To see the other types of publications on this topic, follow the link: Seedling dry weight and Tomato.
Journal articles on the topic 'Seedling dry weight and Tomato'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Seedling dry weight and Tomato.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Massimi, Mohunnad, and Laszlo Radocz. "Preliminary test: Evaluation and selection of tomato (Lycopersicon esculentum Mill.) varieties resistant to drought and powdery mildew." Acta Agraria Debreceniensis, no. 2 (December 8, 2021): 33–37. http://dx.doi.org/10.34101/actaagrar/2/9746.
Full textAbstract:
Powdery mildew (Leveillula taurica) and (Oidium neolycopersici) are two harmful fungi that invade the tomato (Lycopersicon esculentum Mill.) plant and grow in dry conditions. Under the influence of polyethylene glycol 6000 at a concentration of 12%, the total seedlings fresh weight, total seedlings dry weight, seedling growth rate of one seedling, seedling length, and tissue water content percentage for three tomato varieties were assessed. Despite the superiority of the (Mobil) tomato variety in terms of numerical values, the results revealed no significant differences between varieties. As a result, (Mobil) has greater vigor under environmental drought stress of lower osmotic stress than other tomato varieties. More work is required to evaluate the research selection of varieties resistant to biotic stresses in dry areas, such as powdery mildew disease.
2
Ahmadu, Onyinoyi. Martha, Vincent Uchenna Ezewammadu, Uche Emmanuel Augustine, and Sani Abdullahi Mohammed. "Combined effect of hydro priming and root pruning on plant dry matter of tomato (Lycopersicon esculentum) seedlings." International Journal of BioSciences, Agriculture and Technology (IJBSAT) ISSN: 0975 - 4539 11, no. 1 (2020): 1–7. https://doi.org/10.5281/zenodo.3648285.
Full textAbstract:
Combined effect of hydro priming and root pruning on plant dry matter of tomato (Lycopersicon esculentum) seedlings Ahmadu Onyinoyi. Martha, Ezewammadu Vincent Uchenna, Augustine Uche Emmanuel, Mohammed Sani Abdullahi National Biotechnology Development Agency, Bioresources Development Centre, Odi, PMB 170, Bayelsa State, Nigeria martha_ahmadu@yahoo.com, urchmanvinno@yahoo.com, austinemmanueluche@yahoo.com, san4fat@yahoo.com IJBSAT (2020), 11(1):1-7 Abstract This study was conducted as completely randomized design with three replications on plant dry matter of tomato seedling at Bioresources Development Centre, Odi, Bayelsa State, Nigeria. The factor of study included different time hydro priming (control, 24 h, 48 h, 72 h and 96h) and afterwards roots were pruned 25 DAS (rps 1/3-25 DAS and 2/3-25 DAS) and 32 DAS seedlings (rps 1/3-22 DAS and 2/3-32 DAS). The characters measured were: total plant dry matter, dry leaf weight, dry stem weight, dry root weight and root: shoot ratio of mean, min, max and CV. The results showed that hydropriming and root pruning significantly affected the growth of tomato seedlings. The total plant dry matter (W) of non root pruned seedlings for all primed seeds was significantly higher compared with primed seed with root pruned. The highest average dry matter (1.15g and 1.17g) was obtained from seeds primed for 96h (rps 1/3-25DAS and nps 32 DAS respectively) while the lowest average dry matter (0.37g and 0.34g) was obtained from seeds primed for 96h (rps 2/3-25 DAS and same 96h rps 2/3-32 DAS respectively). Mean comparison of root-shoot ratio pruned for 96hrs (rps 2/3-25DAS) and 72hrs (rps 2/3-32 DAS) showed the highest and lowest mean ratio respectively. Leaf and stem weight of all primed seeds including control all exhibited significant variations irrespective of the severity of root pruning and days after sowing. The results demonstrated that the interaction between the different hydropriming duration and root pruning of varying severity of tomato seedlings had significant effect on its plant dry matter. Key words: Hydro priming, pruning, Seedling dry weight and Tomato. URL: https://www.ijbsat.org/papers-published/ijbsat-2020-volume-11-issue-1
3
Zhang, Haoyu, Chen Miao, Cuifang Zhu, et al. "Effects of Different Cultivation Facilities and Planting Densities on Tomato Seedling Production." HortScience 60, no. 7 (2025): 1065–74. https://doi.org/10.21273/hortsci18568-25.
Full textAbstract:
Plant factories with precise control systems create a stable microenvironment, making them essential for cultivating stronger, more uniform seedlings needed for high-quality production. Among the various factors influencing seedling quality, planting density plays a critical role as a key management practice. To explore this relationship, the combined effects of cultivation facilities and planting densities on tomato (Solanum lycopersicum L.) seedlings were investigated in this study. Two facilities were compared: a plant factory with artificial light (PFAL) and a glasshouse with natural light (GHNL). The results revealed that the specific leaf area, health index, ratio of dry weight to fresh weight, and radiation use efficiency (RUE) were predominantly affected by planting density, whereas plant height, leaf area, chlorophyll content, and epicotyl and hypocotyl lengths were mainly influenced by the cultivation facilities. The stem diameter was minimally affected by these conditions. The epicotyl and hypocotyl lengths were significantly greater in the GHNL, while the stem diameter remained unchanged. Seedlings grown in the GHNL had a higher fresh weight, but similar dry weight compared with those grown in the PFAL, with the lowest leaf-to-stem weight ratio observed in the GHNL for both fresh and dry weights. Among treatments, natural light with low planting density (NL, 80 seedlings per tray) produced the highest dry weight, whereas artificial light with high planting density (AH, 240 seedlings per tray) resulted in the lowest. Both the health index and the ratio of dry weight to fresh weight were enhanced with low planting density. The PFAL significantly increased the chlorophyll and carotenoid levels. Furthermore, the RUE of seedlings with high planting density was significantly greater than seedlings with low planting density. The combination of a higher planting density and the PFAL appears to offer certain benefits for seedling production, including graft suitability and production costs.
4
Ghimire, Santosh, Sapana Acharya, Chiran Adhikari, Suman Chaurel, and Randhir Paudel. "Effect of Growing media on Germination and Seedling Growth of Four Different Varieties of Tomato [Solanum lycopersicum (L.)] in Khumaltar Lalitpur, Nepal." Asian Journal of Agricultural and Horticultural Research 11, no. 4 (2024): 49–61. http://dx.doi.org/10.9734/ajahr/2024/v11i4339.
Full textAbstract:
Aims: Food security is one of the global challenges in this developing world, and the quality of seedlings influences the overall production of vegetables. Thus, the core objective of the study was to determine the impact of various growing media on high-quality seedling production and to analyze whether these media were variety-specific or not. Study Design: A two-factor factorial experiment using a completely randomized design (CRD) was conducted to assess the interaction effects of both factors. Place and Duration of Study: The experiment was conducted at the seedling production greenhouse of Vegetable Crops Development Centre-Khumaltar Lalitpur, Nepal in March, 2023. Methodology: Six different combinations of growing media: soil, sand + soil + FYM, sand + soil + vermicompost, coco peat, coco peat + FYM, and coco peat + vermicompost, and four different varieties of tomato: Srijana, Khumal-2, Khumal-3 and Monoprecos were tested in a two-factor factorial completely randomized design (CRD) with three replications for each combination of treatments. Results: The results of this experiment revealed that seeds of all varieties of tomato on coco peat and vermicompost were successful in better seedling growth and seedling health. Also, growing media with coco peat led to a higher germination percentage (72.92%), lower mean germination time (8.922 days), and higher speed of germination (1.745). Coco peat + vermicompost showed superior seedling growth parameters, including shoot length (7.852 cm), root length (7.123 cm), root to shoot ratio (1.161), dry weight (0.1781 g), fresh weight (1.483 g), and dry matter accumulation (12.90%). Among the varieties, Monoprecos exhibited the highest germination percentage (66.1%) and seed vigor index (933.8), although it had the highest mean germination time (10.26 days). Shoot length, speed of germination, root length, and root to shoot ratio were statistically similar among varieties. Fresh and dry weights were higher in the Srijana variety, while dry matter accumulation did not vary significantly among varieties. Conclusion: Vermicompost in the presence of coco peat has a significant impact on the germination and growth of tomato seedlings. No variety-specific growing media was recommended for seedling production in tomatoes. Based on the results, it is recommended to explore the effect of different compositions of vermicompost on tomato seedlings for healthy seedling production.
5
Maynard, Elizabeth T., Wenjing Guan, Petrus Langenhoven, and Lori Hoagland. "Tomato Seedling Performance in Commercial Organic Growing Media." HortTechnology 34, no. 1 (2024): 80–91. http://dx.doi.org/10.21273/horttech05244-23.
Full textAbstract:
Healthy transplants are critical to productivity in the field. For certified organic production in the United States, seedlings must be grown in media that meet the standards of the US Department of Agriculture’s National Organic Program. Many commercial organic media options are available, they vary substantially in composition, and it is unknown to what extent this influences seedling performance. This project compared tomato (Solanum lycopersicum L.) seedling emergence and growth in seven commercially available media for organic production and evaluated posttransplant performance. Tomato seedlings were grown in greenhouses at Wanatah, West Lafayette, and Vincennes, IN, USA. Chemical characteristics of the media measured in saturated media extract ranged as follows: pH 5.2–7.5; electrical conductivity (EC) 0.79–4.68 dS·m−1; 1–332 ppm nitrate-nitrogen, 5–69 ppm phosphorus, 41–451 ppm potassium, 78–714 ppm calcium, and 25–121 ppm magnesium. Higher media EC was associated with slower and less uniform seedling emergence and reduced total emergence. Seedling aboveground dry weights were significantly greater in media that contained compost. Relative performance in media containing compost varied across trials. The aboveground dry weight of tomato seedlings 4 weeks after transplanting did not differ for seedlings started in the five compost-based media, and those plants were significantly larger than plants started in the two media without compost. Larger plants tended to flower and set fruit earlier. Media testing protocols that predict nutrient supply over the production cycle could likely improve management in organic transplant production.
6
Akter, Amaily, Kee Zuan Ali Tan, Susilawati Binti Kasim, et al. "Influence of Beneficial Bacterial Inoculation on Nitrogen Concentration and Tomato Seedling Growth Under Glasshouse Conditions." Sains Malaysiana 52, no. 4 (2023): 1069–85. http://dx.doi.org/10.17576/jsm-2023-5204-04.
Full textAbstract:
Many types of soil bacteria through antagonistic activity, thrive in the rhizosphere of plants or surround the tissues of plants and encourage plant development and reduce the nematode population. Bacteria as such are commonly known as Plant Growth-Promoting Rhizobacteria (PGPR). The purpose of this research was to determine Bacillus spp. inoculations impact on tomato seedling development with varying rates of chemical nitrogen-fertilizer. To minimize the recommended quantity of N fertilizer for tomato seedling development, a small pot experiment with selected PGPB was undertaken with varying amount of N fertilizer. Plant growth-promoting bacteria (PGPB) labeled as UPMB10 and UPMRB9 (identified as Bacillus subtilis and Bacillus tequilensis, respectively) were utilized as microbial inoculants because they showed a significant improvement in seedling growth and N concentration in tomato plant tissues in a pot culture investigation. These microbial inoculants significantly improved the development of the plants, stem length, root length, leaves number, dry weight of shoots (stem, leaves), dry weight of roots, SPAD value, N concentration in tissues, and soil bacterial population. Bacteria-treated seedlings with 50% N fertilizer significantly increased stem length (69.07%), root length (78.51%), leaves number (68.58%), shoots (92.45%, 90.39%, stem and leaves, respectively), roots (73.33%), SPAD value (50.31%), and N concentration in plant tissues (63.79%) as compared to the uninoculated control. The findings also showed that inoculation of the Bacillus spp. tomato seedlings could save up to 50 percent of the recommended rate of chemical N fertilizer without affecting tomato seedling growth. The findings of this study suggest that the amount of nitrogen fertilizer given during tomato seedling development can be reduced by half, resulting in increased soil health and reduced environmental pollution.
7
Jarak, Mirjana, Simonida Djuric, and Biljana Djordjevic. "Benefits of inoculation with azotobacter in the growth and production of tomato and peppers." Zbornik Matice srpske za prirodne nauke, no. 119 (2010): 71–76. http://dx.doi.org/10.2298/zmspn1019071j.
Full textAbstract:
The aim of this research was to investigate the effects of Azotobacter chroococcum in tomato and pepper growth and production by using two types of inoculation - seed inoculation and seedling inoculation. The effect of inoculation was observed thirty days after sowing, thirty days after transplanting, and in the phase of technological maturity. The following were measured: height of the plants, dry matter of the plants and number and the weight of the fruits. Inoculation had a positive effect on these in both plants. With tomato, better results were achieved when seedlings were inoculated. With pepper, the length of the plant and the dry matter were greater with seedling inoculation, whereas the number and the weight of the fruits were greater with seed inoculation.
8
Pertuit, A. J., Jerry B. Dudley, and Joe E. Toler. "Leonardite and Fertilizer Levels Influence Tomato Seedling Growth." HortScience 36, no. 5 (2001): 913–15. http://dx.doi.org/10.21273/hortsci.36.5.913.
Full textAbstract:
New Mexico-mined raw leonardite was characterized by comparing it with the International Humic Substances Society's Standard Leonardite. In the first experiment, adding as little as 1/64 leonardite (v/v) to a sand medium increased tomato [Lycopersicon esculentum (L.) Mill. `Mountain Pride'] root and shoot growth compared with plants produced with fertilizer alone. Growth increased linearly with increasing leonardite levels, from 0% to 25%; however, 50% leonardite inhibited growth. In a second experiment, leonardite alone had no effect on plant height, shoot or root fresh and dry weight, or total leaf area, but stimulated growth when combined with a complete fertilizer. Adding 1/3 leonardite (v/v) (the highest level) and a complete fertilizer increased plant height 40%, total leaf area 160%, shoot fresh weight 134%, root fresh weight 82%, shoot dry weight 133%, and root dry weight 400%.
9
MASSON, JEAN, ANDRÉ GOSSELIN, and NICOLAS TREMBLAY. "EFFETS DE LA FERTILISATION AZOTÉE SUR LA CROISSANCE DE TRANSPLANTS DE TOMATE ET DE LAITUE CULTIVÉS EN PLATEAUX MULTICELLULAIRES AVEC OU SANS ÉCLAIRAGE D’APPOINT." Canadian Journal of Plant Science 70, no. 4 (1990): 1199–205. http://dx.doi.org/10.4141/cjps90-148.
Full textAbstract:
Tomato (Lycopersicon esculentum Mill. ’Springset’) and lettuce (Lactuca sativa L. ’Ithaca’) transplants were grown under natural and supplemental light (100 μmol m−2 s−1 PAR) and fertilized with four nitrogen doses (100, 200, 300, and 400 mg L−1 N). Supplemental light increased tomato shoot dry weight, shoot percent dry matter, leaf area, root dry weight, and root-to-shoot ratio. Lettuce transplants showed increased shoot and root dry weight as well as leaf area when supplemental light was present. For both species, nitrogen increased shoot dry weight and leaf area, but decreased shoot percent dry matter and root-to-shoot ratio. High nitrogen doses increased tomato and lettuce shoot dry weight and leaf area chiefly under supplemental light.Key words: Lycopersicon esculentum, Lactuca sativa, pretransplanting nutritional conditioning, seedling
10
LIPTAY, A. "REDUCTION OF SPINDLINESSS OF TOMATO TRANSPLANTS GROWN AT HIGH DENSITIES." Canadian Journal of Plant Science 65, no. 3 (1985): 797–801. http://dx.doi.org/10.4141/cjps85-104.
Full textAbstract:
The spindliness of tomato transplants grown at high densities in a greenhouse was reduced by an ethephon spray or intermittent vibration of the seedlings with air movement. Either treatment reduced the following growth parameters: plant height, height-to-stem-diameter ratio, stem diameter, fresh weight, and dry weight. One ethephon spray alone reduced the height and improved the stalkiness of the seedling. Vibration of the plants with air movement had an even greater height-reduction effect while a combination of the two treatments was the most effective in producing the stalkiest transplants.Key words: Lycopersicon esculentum, plant height, stem diameter, tomato, growth regulator
11
Fierro, Alejandro, André Gosselin, and Nicolas Tremblay. "Supplemental Carbon Dioxide and Light Improved Tomato and Pepper Seedling Growth and Yield." HortScience 29, no. 3 (1994): 152–54. http://dx.doi.org/10.21273/hortsci.29.3.152.
Full textAbstract:
The experiment was conducted to determine the effects of CO, enrichment (900 μl·liter-1, 8 hours/day) in combination with supplementary lighting of 100 μmol·s-1·m-2(16-h photoperiod) on tomato (Lycopersicon esculentum Mill.) and sweet pepper (Capsicum annuum L.) seedling growth in the greenhouse and subsequent yield in the field. Enrichment with CO2 and supplementary lighting for ≈ 3 weeks before transplanting increased accumulation of dry matter in shoots by ≈ 50% compared with the control, while root dry weight increased 49% for tomato and 6270 for pepper. Early yields increased by =1570 and 11% for tomato and pepper, respectively.
12
R, Sivakumar, Durga Devi D, and Chandraseka C N. "In-vitro Screening of Tomato Genotypes for Drought Tolerance." Madras Agricultural Journal 98, December (2011): 369–73. http://dx.doi.org/10.29321/maj.10.001217.
Full textAbstract:
A study was carried out to assess the drought tolerance ability of 32 tomato genotypes using PEG - 6000 induced moisture stress, on the basis of seedling parameters such as germination percentage, root length, shoot length, seedling dry weight and vigour index. In vitro screening revealed that seedling characters were reduced significantly at -0.2 MPa compared to control. Among the genotypes LE 18, LE 57, LE 27, LE 13 and LE 118 performed better under stress in terms of germination percentage, root length, shoot length, seedling dry weight and vigour index. Many of the genotypes did not germinate at -0.35 MPa. Varieties like CO 3, PKM 1, TNAU TH CO 3 and COTH 2 showed poor performance in terms of germination percentage, root and shoot length. This result can be used for pot and field level screening and manipulations in tomato cultivars for improvement of drought tolerance.
13
Aguirre-Becerra, Humberto, Juan Fernando García-Trejo, Cristina Vázquez-Hernández, et al. "Effect of Extended Photoperiod with a Fixed Mixture of Light Wavelengths on Tomato Seedlings." HortScience 55, no. 11 (2020): 1832–39. http://dx.doi.org/10.21273/hortsci15342-20.
Full textAbstract:
Light is an abiotic factor, and its quality, quantity, and photoperiod can be modulated to work as eustress inductors to regulate plant processes. It is known that red (R), blue (B), far-red (FR), and ultraviolet-A wavelengths can promote photomorphogenesis and secondary metabolite production in plants. Several ratios of R:B and the addition of end of-day FR, separately, have beneficial effects on plant development, whereas adding ultraviolet-A enhances the production of secondary metabolites such as phenols. However, the effects of extended photoperiods with a mixture of these four wavelengths and extra end-of-day FR have not been evaluated for plants of commercial interest. The objective of this study was to determine the effects on tomato seedlings (‘Saladette’, CORDOBA F1) of different overnight photoperiods using a fixed combination of R (625 nm), B (460 nm), FR (720 nm), and ultraviolet-A (410 nm). We expected increases in the production of specialized metabolites and the generation of beneficial changes in the seedling biomass and morphology. Four treatments involving overnight artificial light provided by a light-emitting diode (LED) module were established: TC (control), 0 h; T1, 4 hours; T2, 8 hours; and T3, 12 hours. All treatments were subjected to a 12-hour natural photoperiod and 12 hours of overnight artificial light. The experiment lasted 4 weeks, and plants were sampled every week for physical and phytochemical measurements. In general, seedlings subjected to 4-hour and 8-hour treatments presented better results than those subjected to the control and 12-hour overnight photoperiod treatments. Seedlings subjected to treatments with an 8-hour overnight photoperiod presented large accumulation of biomass in the stem rather than in the leaves because they had large stem dry weight, stem weight, and elongation and higher first, second, and third internode lengths; however, they had lower leaf area, leaf dry weight, and health index. Seedlings subjected to treatment with a 4-hour overnight photoperiod were visually bigger, with large leaf expansion, total length, stem weight, total weight, and specific leaf area; however, this treatment had a negative impact on the biomass accumulation, with lower leaf weight, stem dry weight, and health index. The 12-hour treatment had a negative impact on the leaf area, and thus the specific leaf area, of seedlings; however, the biomass accumulation was large, with higher leaf dry weight, total dry matter, and specific leaf area, but no difference in stem dry weight compared with the control. At the end of the experiment, the total phenolic content increased in all treatments compared with the control, but the flavonoid content decreased. Moreover, the antioxidant capacity was higher for T2 during the last 2 weeks of the experiment. Results are discussed according to the possibilities of using this light strategy for seedling production.
14
A. Desher, Mohsen. "The Effect of Phosphate Fertilizer Starter Solution on Growth of Two Tomato(Lycopersicon Esculentum Mill)Varieties in Sandy Soil." Al-Qadisiyah Journal For Agriculture Sciences (QJAS) (P-ISSN: 2077-5822 , E-ISSN: 2617-1479) 7, no. 1 (2018): 137–47. http://dx.doi.org/10.33794/qjas.vol7.iss1.17.
Full textAbstract:
A field experiment is conducted during the growing season of 2012 - 2013 on a sandy loam soil at Al-Berjsia researches station / Ministry of Agriculture , Basrah province , south of Iraq . The aim of study is to determine the effect of phosphate fertilizer starter solution on the growth of Two Tomato( Lycopersicon Esculentum Mill ) varieties ( Hotuf and Speedy ) and P-uptake . Phosphate fertilizer as consternated super Phosphate (CSP)is applied at level 120 Kg P ha-1 . An equivalent of 0 , 0.05 , 0.10 and 0.20 % of Phosphor level are added as starter solution either at transplanting time or three days after transplanting . The remaining of Phosphorus level was applied to soil at two doses . Percentage of dead seedling , plant height , number of leaves plant-1 , number of branchesplant-1 , number of flower clusters plant-1 , shoot and root dry weight , P concentration in leaves and P-uptake by plant are investigated . The results showthat addition of CSP starter solution significantly decreases the percentage of dead seedling of compared with the control treatment. Plants received Phosphor starter solution show a higher growth parameters and P-uptake as compared with control treatment plants . Increasing the level of Phosphor starter solution from 0 to 0.20 % decreases percentage of dead seedling by 90.1 % and increased plant height by 19.23 % , number of leaves by 33 % , number of branches by 23.52 % , number of flower clusters by 69.24 % , shoot dry weight by 183.1 % , root dry weight by 175 % , P concentration by 60.8 % and P-uptake by 309.7% . Comparing between two tomato varieties ,results show thatSpeedy tomato varietyis more tolerant to transplanting and gives a higher growth and P-uptake ,the results show also tomato seedlings received starter solutions at three days after transplanting time appear more resistant to soil shuck of transplanting than those plants received starter solution at transplanting.
15
A. Desher, Mohsen. "The Effect of Phosphate Fertilizer Starter Solution on Growth of Two Tomato(Lycopersicon Esculentum Mill)Varieties in Sandy Soil." Al-Qadisiyah Journal For Agriculture Sciences (QJAS) (P-ISSN: 2077-5822 , E-ISSN: 2617-1479) 7, no. 2 (2018): 98. http://dx.doi.org/10.33794/qjas.vol7.iss2.32.
Full textAbstract:
A field experiment is conducted during the growing season of 2012 - 2013 on a sandy loam soil at Al-Berjsia researches station / Ministry of Agriculture , Basrah province , south of Iraq . The aim of study is to determine the effect of phosphate fertilizer starter solution on the growth of Two Tomato( Lycopersicon Esculentum Mill ) varieties ( Hotuf and Speedy ) and P-uptake . Phosphate fertilizer as consternated super Phosphate (CSP)is applied at level 120 Kg P ha-1 . An equivalent of 0 , 0.05 , 0.10 and 0.20 % of Phosphor level are added as starter solution either at transplanting time or three days after transplanting . The remaining of Phosphorus level was applied to soil at two doses . Percentage of dead seedling , plant height , number of leaves plant-1 , number of branchesplant-1 , number of flower clusters plant-1 , shoot and root dry weight , P concentration in leaves and P-uptake by plant are investigated . The results showthat addition of CSP starter solution significantly decreases the percentage of dead seedling of compared with the control treatment. Plants received Phosphor starter solution show a higher growth parameters and P-uptake as compared with control treatment plants . Increasing the level of Phosphor starter solution from 0 to 0.20 % decreases percentage of dead seedling by 90.1 % and increased plant height by 19.23 % , number of leaves by 33 % , number of branches by 23.52 % , number of flower clusters by 69.24 % , shoot dry weight by 183.1 % , root dry weight by 175 % , P concentration by 60.8 % and P-uptake by 309.7% . Comparing between two tomato varieties ,results show thatSpeedy tomato varietyis more tolerant to transplanting and gives a higher growth and P-uptake ,the results show also tomato seedlings received starter solutions at three days after transplanting time appear more resistant to soil shuck of transplanting than those plants received starter solution at transplanting.
16
Banjade, Dhurba, Dipak Khanal, Sanchita Karkee, and Aman Shrestha. "Effect of different germination media on seed germination and seedling growth of tomato (Solanum lycopersicum L.) in Bhojpur, Nepal." Archives of Agriculture and Environmental Science 9, no. 4 (2024): 741–47. https://doi.org/10.26832/24566632.2024.0904015.
Full textAbstract:
The research was conducted following a Complete Randomized Design (CRD) under plastic tunnel with three replications to investigate the effects of different germination media on seed germination and seedling growth of tomato in Bhojpur Nepal. Nine different compositions of growing media are soil, cocopeat, vermicompost, soil + FYM (1:1), soil + cocopeat (1:1), soil + vermicompost (1:1), cocopeat + vermicompost (1:1), soil + cocopeat + vermicompost (1:1:1) and soil+ cocopeat + vermicompost + FYM (1:1:1:1). Seeds of tomato variety (Srijana) was sown in Plastic tray. Germination parameters such as germination percentage, germination speed, germination energy, and vigor index were recorded for seven consecutive days. Growth parameters including root length, shoot length, number of leaves, stem diameter, fresh seedling weight and dry seedling weight were measured at 20, 25 and 30 days after sowing. There were significant differences in the germination parameters and growth parameters. The maximum germination percentage (100%), maximum seedling vigor index (2329), root length (10.967cm), number of leaves (20.87cm) was recorded in soil + cocopeat + vermicompost + FYM (1:1:1:1) as a growing media. However maximum shoot length (12.847cm), maximum stem diameter (0.310cm) and maximum fresh weight (1.540g) was recorded in soil + cocopeat + vermicompost (1:1:1) as a growing media. Hence, optimum growth of tomato seedlings was observed when soil, cocopeat, vermicompost and FYM were used in equal proportions.
17
Yu, Ping, Qiansheng Li, Lan Huang, Genhua Niu, and Mengmeng Gu. "Mixed Hardwood and Sugarcane Bagasse Biochar as Potting Mix Components for Container Tomato and Basil Seedling Production." Applied Sciences 9, no. 21 (2019): 4713. http://dx.doi.org/10.3390/app9214713.
Full textAbstract:
To investigate the potential of biochar as a propagation mix component, three experiments were conducted. A phytotoxicity test was conducted with water extract of sugarcane bagasse biochar (SBB), SBB mixes (10%, 30%, 50%, and 70% SBB with 30% perlite (P) and the rest being peat moss (PM); by vol.), mixed hardwood biochar (HB) mixes (10%, 30%, 50%, 70% and 100% HB with PM; by vol.), PM, P, 70%PM:30%P, and a commercial propagation mix (exp. 1). None of the mixes caused phytotoxicity. The same biochar mixes (except 100% HB) were used for the seedling growth test (exp. 2). Both tomato and basil seedlings grown in all of the biochar mixes (except 50% HB) had significantly lower fresh weight, dry weight and growth index (GI) compared to a commercial propagation mix. Six seedlings from each biochar mix were transplanted into a commercial growing mix and grown for four weeks (exp. 3). Tomato seedlings from all biochar mixes (except 30% SBB) had similar SPAD (Soil-Plant Analyses Development) and GI to the control. Basil seedlings from all HB mixes, 70% and 100% SBB mixes had similar GI to the control. In conclusion, 70% HB could be amended with PM for tomato and basil seedling production without negative effects on plant biomass.
18
Nisha, Nisha, Axay Bhuker, Mukesh Kumar, Rahul Rahul, and Gagandeep Singh. "Effect of priming treatment and storage containers to enhance the seed quality of tomato seeds." International Journal of Environment, Agriculture and Biotechnology 9, no. 1 (2024): 026–33. http://dx.doi.org/10.22161/ijeab.91.4.
Full textAbstract:
A study was undertaken at the Department of Seed Science and Technology, CCS Haryana Agricultural University, to investigate the Effect of priming treatment and storage containers to enhance the seed quality of tomato seeds. The experiment, conducted in 2021-2022, utilized a randomized complete block design to assess various seed priming techniques and their influence on tomato germination and morphological characteristics. Eighteen month-old seeds of tomato seeds were exposed to the following priming treatments T0: Control (untreated). T1: Priming with GA3 @ 25, 50 and 75 ppm for 24 hours and drying at room temperature. T2: Priming with KNO3 (Potassium Nitrate) @ 0.5 %, 1 %, and 1.5 % for 24 hours followed by drying at room temperature. T3: Priming with Ethanol @ 25, 50 and 75 ppm for 24 h and drying at room temperature. Within the various priming treatments, tomato seeds subjected to GA3 priming at a concentration of 50 ppm exhibited the highest rates of germination, seedling length, seedling dry weight, seed vigor index, viability percentage, and radicle emergence. Following closely were seeds primed with KNO3 at 1.5%. Conversely, ethanol at 50 ppm resulted in the lowest values for germination percentage, seedling length, seedling dry weight, seed vigor index, and viability percentage. Notably, GA3 priming at 50 ppm demonstrated a substantial improvement, enhancing tomato germination by 24.6% compared to unprimed seeds in 18-month-old seed samples.
19
Maldonado, Jorge Federico, Marta Susana Agüero, María Belén Buglione, Facundo Iturmendi, Marcela Viviana Filippi, and Daniel Alfredo Martínez. "Pear and apple pomace compost as an alternative to commercial substrates in the production of tomato seedlings." Revista de la Facultad de Ciencias Agrarias UNCuyo 53, no. 1 (2021): 128–38. http://dx.doi.org/10.48162/rev.39.013.
Full textAbstract:

 It is important to look for alternative substrates to replace non-renewable resources such as peat used in growing media in horticulture. The aim of this work was to evaluate if the compost of pear and apple pomace could be used as an alternative to a commercial substrate for the production of tomato seedlings. Two experiments were carried out on trays with alveoli of 100 cm3 (experiment 1) and 30 cm3 (experiment 2). In experiment 1, three substrates were used: commercial substrate (CS), mixture of CS and pomace compost (CS+C) and pure compost (C). In experiment 2 a fourth treatment with a mixture of compost and perlite (C+P) was incorporated. The obtained results indicate that the development of the seedlings using CS+C and CS as a substrate was similar in cells of 100 cm3 and higher in cells of 30 cm3. In addition, the growth of seedlings on C+P in relation to CS showed similar or higher values in some variables. These results indicate that it would be feasible to replace the use of non-renewable resources such as peat in the production of tomato seedlings by a product obtained from a residue.
 Tomato seedling growth was evaluated on trays with 100 cm3 alveoli and 30 cm3 alveoli on different substrates mixtures: commercial substrate (CS), mixture of CS and pomace compost (CS+C), pure compost (C) and mixture of compost and perlite (C+P).
 Highlights
 
 Seedling development using CS+C and CS as substrates was similar in cells of 100 cm3 and higher in cells of 30 cm3.
 Seedling growth on C+P in relation to CS, showed similar or higher values for some variables such as root dry weight, shoot dry weight, stem diameter and shoot height.
 In 30 cm3 cell trays of the compost and perlite treatment (3:1 v/v), obtained seedling quality would enable a high post-transplant survival percentage.
 Pear and apple pomace compost may be an alternative to a commercial substrate containing peat for tomato seedlings production (Lycopersicon esculentum Mill.).
20
McAvoy, R. J., and H. W. Janes. "Cumulative Light Effects on Growth and Flowering of Tomato Seedlings." Journal of the American Society for Horticultural Science 115, no. 1 (1990): 119–22. http://dx.doi.org/10.21273/jashs.115.1.119.
Full textAbstract:
Tomato seedlings (Lycopersicon esculentum Mill. cv. Laura) were grown in an environmental chamber. In two separate experiments, plant growth from emergence to anthesis was divided into three equivalent segments based on either the actual number of days or the stage of plant development. In both experiments, plants were exposed to a high PPF (300 μmol·s-1·m-2)2) treatment (H) for one segment and a lower PPF (150 μmol· s-1·m-2) treatment (L), for the other two segments, resulting in three light treatment combinations (i.e., HLL, LHL, and LLH). Total dry weight and dry weight per unit of leaf area increased significantly in response to high PPF during all three treatment periods. Final plant weights and plant heights differed significantly between treatments, resulting in distinct plant growth characteristics. Plants from the HLL treatment began to flower 1 day before the LHL treatment and 2 days before the LLH treatment. The HLL plants initiated fewer leaves before initiation of the floral axis than the LHL and LLH plants. The light environment following the initial segment of seedling development most influenced final truss position at anthesis.
21
Mavi, Kazım, and Fulya Uzunoğlu. "Effects of pre-sowing treatments with allelopathic plant extracts on tree tomato (Solanum betaceum Cav.) seedling emergence and performance." Agronomía Colombiana 38, no. 2 (2020): 190–96. http://dx.doi.org/10.15446/agron.colomb.v38n2.84373.
Full textAbstract:
Seeds of the tree tomato (Solanum betaceum Cav.) were treated with allelopathic plant extracts: ferula gum (FER, 0.2 g gum L-1, 25°C, 24 h), lantana petal extract (LAN, 4 g dried petal L-1, 25°C, 24 h) and marigold petal extract (TAG, 4 g dried petal L-1, 25°C, 24 h) along with an untreated control to determine the effect of these extracts on seedling emergence and performance. The pre-sowing influence of the allelopathic extracts (FER, LAN and TAG) on the emergence percentage (%), mean emergence time (days), emergence index, coefficient of velocity of emergence (%), seedling length (cm), seedling fresh weight (mg), seedling dry weight (mg), and stimulatory allelopathic index (%) was investigated in tree tomato seeds. The results revealed that pre-sowing treatment with the studied allelopathic plant extracts showed higher seedling emergence and performance. The greatest advantage of the pre-sowing treatment was observed in the TAG treatment. Allelopathic TAG treatment resulted in 15% higher seedling emergence rates, 3.3 d faster mean emergence time, 153 mg heavier seedling weights, and higher emergence index compared to untreated seeds. In addition, the effect of allelopathic FER and LAN treatments was better than the control.
22
Foysal, Foysal, Md Delwar, Md Ahsan, Farjana Farjana, and Muhammad Kabir. "Effect of salinity on seed germination and seedling growth of tomato." Fundamental and Applied Agriculture 7, no. 4 (2022): 336. http://dx.doi.org/10.5455/faa.131830.
Full textAbstract:
The study was carried out to investigate the effects of different salt concen- trations on germination and seedling growth of four varieties of tomato. Experimental treatment included five levels of NaCl concentration (0, 25, 50, 100 and 150 mM) and four varieties of tomato (Binatomato-6, Binatomato-7, Binatomato-8, Binatomato-9). Data on germination percentage, radicle and plumule length, fresh weight of plumule and radicle, dry weight of plumule and radicle were recorded at different days after sowing (DAS) in Petri dishes. Results on main effects of varieties on germination of seed revealed that there was significant difference among four varieties of tomato at different days after sowing. At 9th days after sowing seeds, the highest percentage of seed germination (94.67%) was recorded in the variety Binatomato-6 and the lowest percentage of seed germination (61.33%) was observed in the variety Binatomato-8. NaCl solutions significantly affected seed germina- tion in tomato with the increase of NaCl solutions. At 11 days after sowing seeds, the highest percentage of seed germination (81.33%) of tomato was recorded in case of control (0 mM NaCl) and the lowest percentage of seed germination (0%) was observed in case of 150 mM NaCl salt solution. In case of combined effects of varieties and different levels of NaCl solutions on seed germination of tomato, the highest seed germination was recorded in the variety Binatomato-6 with control i.e. without any NaCl at 11 days after seed sowing. The germination percentage, germination coefficient, radicle and plumule length, seed vigor index, fresh weight of plumule and radicle, dry weight of plumule and radicle decrease with increasing NaCl salt solutions in the germination media compare to control. Result showed that among the four varieties of tomato, Binatomato-6, Binatomato-7 and Binatomato-9 are relatively more salt tolerant than Binatomato-8.
23
Kumar, Vivek, Bandana Bose, and Padmanabh Dwivedi. "Seed priming with Mg(NO3) 2 and Ca(NO3) 2 salts influence the growth of tomato seedlings." Ecology, Environment and Conservation 29 (2023): 378–85. http://dx.doi.org/10.53550/eec.2023.v29i02s.061.
Full textAbstract:
Seed is the most valuable input in agriculture, and high-quality seeds are required for healthy crop production. Various seed quality enhancement technologies are continuously used for better establishment of crop in field. Seed priming is one of the best, cheapest, reliable and cost-effective strategies to boost seed germination and seedling establishment. This experiment was conducted to determine the effect of seed priming with various concentration of Mg(NO3 )2 , and Ca(NO3 )2 salts in two tomato genotypes (VRT 06 and Punjab Chhuhara) on germination and seedling growth. The concentration level C0 to C7 (2.5 mM to 20 mM) were used for priming purpose and germination parameters were recorded. From the study of germination %, mean germination time (MGT)(days), Germination index (GI), Coefficient of velocity of germination (CVG) and Germination rate index (GRI) (%/day), seedling length (cm), seedling fresh weight (FW) (mg), seedling dry weight (DW) (mg) and seedling vigor index (SVI), it was revealed that 7.5mM of Mg(NO3 )2 , and Ca(NO3 )2 , were the most effective treatments, which were able to improve performance of seedling establishment of tomato seeds.
24
Kulkarni, Manoj G., Glendon D. Ascough, and Johannes Van Staden. "Effects of Foliar Applications of Smoke-Water and a Smoke-isolated Butenolide on Seedling Growth of Okra and Tomato." HortScience 42, no. 1 (2007): 179–82. http://dx.doi.org/10.21273/hortsci.42.1.179.
Full textAbstract:
The ecologic significance of smoke-related seed germination is now well recognized. Consequently, smoke solutions and a pure butenolide, the active compound from smoke that stimulates germination of a number of plant species, show great potential for enhancing the growth of vegetable crops. Achieving maximum production and better and faster growth of the seedlings has always been a priority for vegetable growers. This study therefore highlights the effects of foliar application of smoke-water and a butenolide on seedling growth of okra [Abelmoschus esculentus (L.) Moench] and tomato (Lycopersicon esculentum Mill.). Treating okra seedlings with smoke-water (1:500 v/v) showed a significant (P < 0.05) increase in shoot/root length, shoot fresh/dry weight, number of leaves, total leaf area, and stem thickness compared with the control treatment. Treatment of okra seedlings with smoke-water significantly (P < 0.05) increased the absolute growth rate (AGR) per week. However, the seedling vigor index (SVI) did not improve as a result of no change in root fresh weight. On the other hand, foliar application of smoke-water and butenolide showed a pronounced effect on the seedling growth of tomato. Most of the growth parameters examined for both the treatments were significantly (P < 0.05) increased, resulting in a significantly (P < 0.05) higher SVI and AGR than the control. This study indicates that the foliar application of smoke-water or butenolide may be a useful and inexpensive technique for enhancing seedling growth of vegetable crops.
25
Schuerger, Andrew C., and Philip D. Laible. "Biocompatibility of Wheat and Tomato in a Dual Culture Hydroponic System." HortScience 29, no. 10 (1994): 1164–65. http://dx.doi.org/10.21273/hortsci.29.10.1164.
Full textAbstract:
`Yecora Rojo' Wheat (Triticum Aestivum L.) And `Florida Petite' Tomato (Lycoper-Sicon Esculentum Mill.) Plants Were Grown In Monocultured Or Intercropped Recirculating Hydroponic Systems To Determine Whether Plant Growth Or Yield Would Be Affected By Intercropping. Mean Fruit Weight Was Slightly Lower (12%) For Intercropped Than For Monocultured Tomato Plants. The Number Of Tillers Per Plant Was Slightly Lower (7%) For Wheat, And Grain Dry Weight Per Plant And Mean Seed Dry Weight Were Slightly Higher (14% And 15%, Respectively) For Intercropped Than For Monocultured Plants. A Lettuce Seedling Bioassay Showed No Evidence Of Allelopathic Compound Accumulation In Monocultured Or Intercropped Hydroponic Systems.
26
Kandel, Pradeep, Subedi Yuvraj, and Bibek Thapaliya. "Influence of Organic Amendments on Growth and Development of Solanum lycopersicum: Insights from Baglung, Nepal." Peruvian Journal of Agronomy 9, no. 1 (2025): 31–41. https://doi.org/10.21704/pja.v9i1.2024.
Full textAbstract:
An experiment was carried out in Baglung, Nepal, to determine how different soil amendments affected the growth and health of Srijana cv. tomato seedlings. The experiment followed a completely randomized design, with six treatments and four replications. The substrates were prepared using a variety of organic amendments, including control, cattle manure, goat manure, urea, vermicompost, and a coco peat-cattle manure blend. Soil amendments were applied in specific ratios that represented local farming practices. Observations included parameters such as germination percentage, emergence duration, leaf count, final plant stand, plant height, root length, root to shoot ratio, stem diameter, seedling vigor, and fresh/dry seedling weight. The findings revealed significant differences in seedling quality and performance due to various substrates. Seedlings grown in coco peat combined with cow dung had the highest germination percentage (75 %), required the fewest days (8) to reach 50 % germination, produced most leaves (27.5), had the tallest seedling height (26.55 cm), and had the highest final plant stand when compared to other treatments, followed by vermicompost. However, urea-treated seedlings displayed superior biomass accumulation. Control treatment showed inferior performance across most parameters except for a relatively higher root to shoot ratio (0.41). This study emphasizes the importance of soil amendment composition in influencing the early–stage growth and vigor of tomato seedlings, with specific treatments providing varying benefits across several growth metrics.
27
Hossain, Md Farid. "Impact of Transplant Age on the Yield and Yield Contributing Characteristics of Cherry Tomato Varieties (Solanum lycopersicum var. cerasiforme)." Journal of Agroforestry and Environment 18, no. 1 (2024): 44–51. https://doi.org/10.55706/jae1806.
Full textAbstract:
Cherry tomatoes are a high-value crop with growing demand. This research focused on identifying the ideal seedling age for transplanting and evaluating the most productive variety of cherry tomatoes in terms of yield during winter in Gazipur district, Bangladesh, with a specific emphasis on local environmental adaptation. The experiment, designed as a two-factor study focusing on seedling age and variety, was organized using a Randomized Complete Block Design (RCBD) with four replications. Seedlings of varying ages (21, 28, 35, and 42 days) along with two cherry tomato varieties (red and yellow) were used in the study. All experimental plots were transplanted based on the seedling age concurrently. Data analysis involved conducting a two-way ANOVA to assess the relationship between seedling age and variety using R statistical software. Mean separation was performed using Duncan’s Multiple Range Test (DMRT) at a 5% significance level. The interaction between variety and seedling age had a significant impact (P< 0.05) on fruit yield and other traits of cherry tomatoes. The highest average yield per hectare (39.37 t/ha) was observed in the 28-day-old seedlings of the red cherry tomato. This result was attributed to a higher number of fruits per plant (141.25) and greater individual fruit weight (7.08g). Among the varieties, the red cherry tomato exhibited superior plant height, number of fruits per plant, fruit weight per plant, and yield per hectare. So, it may be concluded that transplanting of cherry tomato seedlings at approximately 28 days old is optimal for achieving higher yield during winter in Gazipur district of Bangladesh.
28
Wang, Kelei, Muhammad Moaaz Ali, Keke Pan, Shiwen Su, Jian Xu, and Faxing Chen. "Ebb-and-Flow Subirrigation Improves Seedling Growth and Root Morphology of Tomato by Influencing Root-Softening Enzymes and Transcript Profiling of Related Genes." Agronomy 12, no. 2 (2022): 494. http://dx.doi.org/10.3390/agronomy12020494.
Full textAbstract:
Ebb-and-flow subirrigation is a promising strategy to increase water use efficiency, avoid waterlogging or drought conditions, and promote the overall growth of vegetable crops. The aim of this study was to evaluate the seedling growth, root morphology, activities of root-softening enzymes, and transcript profiling of those enzyme-related genes in tomato under top sprinkle irrigation and ebb-and-flow subirrigation. The results showed that ebb-and-flow subirrigation could significantly improve stem diameter, root fresh weight, root dry weight, root volume, and root diameter of tomato by 9.42%, 45.92%, 44.82%, 15.61%, and 9.41%, as compared with top sprinkle irrigation, respectively. The ebb-and-flow subirrigation also maintained the root activity and photosynthetic rate of tomato seedlings. The activities of superoxidase dismutase, peroxidase, catalase, glutathione reductase, and ascorbate peroxidase of tomato roots under ebb-and-flow subirrigation were remarkably increased, while the malondialdehyde content was decreased compared with the plants grown under top sprinkle irrigation. Correlation analysis among activities of root-softening enzymes and transcriptomic profiling of their biosynthesis-related genes revealed that 10 genes might be responsible for regulation of studied enzymes. Overall, ebb-and-flow subirrigation could significantly promote the growth of tomato seedlings, so as to maintain high activity and promote the cultivation of high-quality and strong seedlings.
29
Wei, Hao, Jiangtao Hu, Chen Liu, et al. "Effect of Supplementary Light Source on Quality of Grafted Tomato Seedlings and Expression of Two Photosynthetic Genes." Agronomy 8, no. 10 (2018): 207. http://dx.doi.org/10.3390/agronomy8100207.
Full textAbstract:
Supplementary lighting is commonly used in high-quality seedling production. In this study, grafted tomato seedlings were grown for 10 days in a glasshouse with 16-h daily supplementary lighting at 100 μmol·m−2·s−1 PPFD (Photosynthetic photon flux density) from either high-pressure sodium (HPS), metal halide (MH), far-red (FR), white LEDs (Light emitting diodes) (W), or mixed LEDs (W1R2B1, where the subscript numbers indicate the ratio of the LED chips) to determine which light sources improve the seedling quality. The control seedlings did not receive any supplementary light. Physiological parameters and the expression of genes related to photosynthesis were analyzed. The results showed that root length, biomass, number of leaves, chlorophyll (SPAD), scion dry weight to height ratio (WHR), and specific leaf weight (SLW) were the greatest for grafted seedlings grown in W1R2B1. The level of root ball formation was the greatest for seedlings grown in W1R2B1, followed by those grown in W, HPS, and MH. Seedlings grown in FR did not fare well, as they were very thin and weak. Moreover, the expression of two photosynthetic genes (PsaA and PsbA) was significantly increased by W1R2B1 and W, which suggests that the plastid or nuclear genes might be regulated. The overall results suggest that W1R2B1 was the most suitable light source to enhance the quality of grafted tomato seedlings. The results of this study could be used as a reference for seedling production in glasshouses, and may provide new insights in the research on lights affecting the development of plants.
30
Nisha, A. Bhuker, SS Jakhar, and N. Singh. "Assess the effect of natural ageing and storage containers on seed quality of tomato seeds." Journal of Agriculture and Ecology 14 (November 5, 2022): 131–34. http://dx.doi.org/10.58628/jae-2214-218.
Full textAbstract:
The present study entitled "Seed quality assessment in the naturally aged seed of tomato was conducted during rabi 2020-2021 and 2021-2022 at the Department of Seed Science and Technology, CCS Haryana Agricultural University, Hisar. The freshly stored seed was observed to be highest in seed quality parameters i.e., germination per cent, seedling length, seedling dry weight and seed vigour indices as compared to when seeds were stored in different containers during 18 months storage period. As the storage period increase, the seed quality parameter goes on decreasing. Among the containers, 18-month seeds stored in a polythene bag (> 700 gauge) recorded significantly higher seed germination (60.67%), seedling length (8.77cm), seedling dry weight (11.42 mg), vigour index -I (532) and seed vigour index-II (793) as compared to a cloth bag. Standard germination percentage was maintained up to 15 months of storage in a polythene bag. In both containers, polythene bags performed better than cloth bags throughout the storage period.
31
Ferreyra, Matías G., Brenda Santamaría, María M. Caffaro, et al. "Large-Scale Plasma-Activated Water Reactor: The Differential Impact on the Growth of Tomato and Bell Pepper Plants in Nutrient-Rich and Nitrogen-Free Substrates." Agronomy 15, no. 4 (2025): 829. https://doi.org/10.3390/agronomy15040829.
Full textAbstract:
In this study, plasma-activated water (PAW) was generated using a large-volume (5 L) plasma reactor with a quasi-stationary, water-cathode glow-type discharge in atmospheric pressure air. Tap water was activated up to 75 min. PAW exhibited high concentrations of long-lived reactive nitrogen species (RNSs), reaching 8 mM, which is between 4 and 26 times higher than those reported in previous studies. The reactor reached an RNS synthesis efficiency of 61 nmol/J and an RNS production rate of 526 μmol/min, both among the highest reported. PAW was evaluated on tomato and bell pepper. Seedling emergence was determined in a nutrient-free substrate. To assess plant growth, seedlings were transplanted into pots filled with either nitrogen-free or nutrient-rich substrate. PAW-irrigation significantly promoted seedling emergence and leaf expansion, especially in tomato plants. The plant growth-stimulating effects of PAW were more pronounced in nitrogen-free substrate: fresh weight of tomato and bell pepper increased up to 13.1-fold and 2.6-fold, respectively. In contrast, the effect on the nutrient-rich substrate was negligible. Tomato plants grown in the nitrogen-free substrate and irrigated with 75-min PAW reached a dry weight comparable to those grown in nutrient-rich substrate. PAW irrigation did not induce oxidative stress, as confirmed by malondialdehyde (MDA) levels and antioxidant enzyme activity.
32
Melo, Raphael AC, Marçal HA Jorge, Adriel Bortolin, Leonardo S. Boiteux, Caue R. Oliveira, and José M. Marconcini. "Growth of tomato seedlings in substrates containing a nanocomposite hydrogel with calcium montmorillonite (NC-MMt)." Horticultura Brasileira 37, no. 2 (2019): 199–203. http://dx.doi.org/10.1590/s0102-053620190210.
Full textAbstract:
ABSTRACT The correct use of hydrogels in some situations can increase seedling survival rates, plant growth, and the water-retention capacity of the growing medium. A technique for the production of a nanocomposite hydrogel using calcium montmorillonite (NC-MMt) was recently developed. However, additional research is necessary in order to validate this innovative input, particularly for the production of vegetable crops seedlings. In this context, the main objective of the present study was to evaluate the growth and development of seedlings, tomato hybrid ‘BRS Nagai’, in substrates containing different amendments of hydrogel NC-MMt. The trial was conducted in a 3x3 factorial arranged in a complete randomized blocks design, with three replications. Three substrates (peat moss, pine bark, and coconut peat) corresponded to the first factor and three rates of the NC-MMt hydrogel (0%= R1, 1.5%= R2 and 2.0%= R3, on a w/w basis) corresponded to the second factor. Each plot was composed of 16 plants that were assessed after three weeks. Overall, peat moss-based and pine bark-based substrates resulted in higher values for most of the analyzed traits: plant emergency percentage, plant height, stem diameter, leaf area, plant height/shoot dry weight ratio, root dry weight, shoot dry weight/root dry weight ratio and the Dickinson Quality Index. Rates of NC-MMt hydrogel displayed significant responses only to root superficial area and root volume. NC-MMt hydrogel amendment (mainly 1.5%) combined with specific substrates (mainly peat moss-based substrate) was able to improve the growth of ‘BRS Nagai’ tomato seedlings, with no observed toxic effects.
33
Rajametov, Sherzod Nigmatullaevich, Eun Young Yang, Hyo Bong Jeong, Myeong Cheoul Cho, Soo Young Chae, and Niroj Paudel. "Heat Treatment in Two Tomato Cultivars: A Study of the Effect on Physiological and Growth Recovery." Horticulturae 7, no. 5 (2021): 119. http://dx.doi.org/10.3390/horticulturae7050119.
Full textAbstract:
High temperature (HT) significantly affects crop physiological traits and reduces productivity in plants. To increase yields as well as survival of crops under HT, developing heat-tolerant plants is one of the main targets in crop breeding programs. The present study attempted to investigate the linkage of the heat tolerance between the seedling and reproductive growth stages of tomato cultivars ’Dafnis‘ and ’Minichal.’ This research was undertaken to evaluate heat tolerance under two experimental designs such as screening at seedling stage and screening from reproductive traits in greenhouses. Survival rate and physiological responses in seedlings of tomatoes with 4-5 true leaves were estimated under HT (40 °C, RH 70%, day/night, respectively) and under two control and HT greenhouse conditions (day time 28 °C and 40 °C, respectively). Heat stress significantly affected physiological–chemical (photosynthesis, electrolyte conductivity, proline) and vegetative parameters (plant height, shoot fresh weight, root fresh weight) in all tomato seedlings. The findings revealed that regardless of tomato cultivars the photosynthesis, chlorophyll, total proline and electrical conductivity parameters were varied in seedlings during the heat stress period. The heat tolerance rate of tomatoes in the seedling stage might not always be associated with reproductive parameters. HT reduced fruit parameters such as fruit weight (31.9%), fruit length (14.1%), fruit diameter (19.1%), and fruit hardness (9.1%) compared to NT under HT in heat-susceptible tomato cultivar ‘Dafnis’, while in heat-tolerant cultivar ‘Minichal’ fruit length (7.1%) and fruit diameter (12.1%) was decreased by the effects of HT, but on the contrary fruit weight (3.6%) and fruit hardness (8.3%) were increased. In conclusion, screening and selection for tomatoes should be evaluated at the vegetative and reproductive stages with consideration of reproductive parameters.
34
Haghighi, Maryam, Zahra Afifipour, and Maryam Mozafarian. "The Alleviation Effect of Silicon on Seed Germination and Seedling Growth of Tomato Under Salinity Stress." Vegetable Crops Research Bulletin 76, no. 1 (2012): 119–26. http://dx.doi.org/10.2478/v10032-012-0008-z.
Full textAbstract:
The Alleviation Effect of Silicon on Seed Germination and Seedling Growth of Tomato Under Salinity StressThis study was conducted to evaluate the effectiveness of silicon (Si) application under salinity levels on seed germination and growth characteristics of tomato seeds. A laboratory experiment was performed on completely randomized design with two levels of salinity (25 and 50 mM NaCl) and 2 concentration of Si (1 and 2 mM) with 4 replications. Germination percentage, germination rate, seedling shoot and root length, fresh and dry weight of seedling and mean germination time was measured. Seed germination ofLycopersicon esculentumL. was significantly affected by salinity levels, Si and their interaction. Germination characteristics of tomato seeds decreased drastically by increasing NaCl concentrations. However, 1 mM Si had positive effects on seed germination characteristics and improved germination percentage, germination rate and mean germination time. Si alleviated the harmful effect of salinity stress on tomato seed germination at almost all germination characteristics.
35
Liptay, A., and P. Sikkema. "Phosphorus restriction: control of transplant growth." Canadian Journal of Plant Science 80, no. 4 (2000): 875–77. http://dx.doi.org/10.4141/p99-120.
Full textAbstract:
Control of tomato (Lycopersicon esculentum Mill.) seedling growth and height during production in the greenhouse is critical for efficient subsequent transplanting and acceptable field performance. Height can be reduced by P fertilisation. Eliminating P from nutrient solutions severely restricted growth. When fed a 10 mg P L−1 in the nutrient solution, seedlings were 11 cm tall after 49 d of growth, but only 3 cm tall without P. Intermediate P reduced height within this range. Transplanting was simulated after 49 d of seedling production by transferring the transplants to a temperature-controlled root chamber in larger volume cells plus fertilisation with a complete nutrient solution. Transplant growth with a complete nutrient solution caused differential growth according to the prior P feeding regime. New root growth in the various treatments was dependent on root growth during the transplant stage. However, shoot growth differed greatly among the P levels. Seedlings grown without any P during transplant production grew very slowly with only a 25% increase in leaf growth after 9 d. With the 2 mg L−1 feeding during transplant production of leaf dry weight increased over 200% during the 9-d period. In conclusion, seedling growth restriction can be achieved by P deprivation; the amount of P deprivation, however, affects subsequent seedling growth. Key words: Phosphorus, nutrients, tomato, transplant.
36
Khan, Md Nazmul Haque, S. M. Abdul Alim, M. M. Islam, et al. "https://jagroforenviron.com/wp-content/uploads/2024/09/Effect-of-Salt-on-Seed-Germination-and-Seedling-Growth-of-Tomato.pdf." Journal of Agroforestry and Environment 17, no. 2 (2024): 61–66. http://dx.doi.org/10.55706/jae1718.
Full textAbstract:
Tomato considered as an important cash crop in terms of vegetable production worldwide. An experiment was conducted at Plant Physiology Laboratory, Dept. of Crop Botany, Bangladesh Agricultural University, Mymensingh in order to investigate the effects of different levels of NaCl concentrations on seed germination and seedling growth of five varieties of tomato. The experiment was carried out by completely randomized design (CRD) with three replications. Experimental treatments consisted of five varieties of tomato (BARI Tomato-2, BARI Tomato-8, BARI Tomato-14, BARI Tomato-17 and BARI Tomato-20) and three levels of NaCl (0, 30, 60 mM). Results on main effects of varieties on germination of seed revealed that there was significant difference among five varieties of tomato seeds at different days after sowing. At 10th day after sowing seeds, the highest percentage of seed germination (64.89%) was recorded in the variety BARI Tomato-8 and the lowest percentage of seed (35.11%) observed in the variety BARI Tomato-2. NaCl solutions significantly affected seed germination in tomato. At 10th day after sowing seeds, the highest percentage of seed germination (56.80%) of tomato was recorded in control. In case of combined effects of varieties and different levels of NaCl solutions on seed germination of tomato, the highest seed germination was recorded in the variety BARI Tomato-20 and BARI Tomato-8 with control at 10th day after seed sowing. The germination percentage, germination coefficient, root and shoot length, seed vigor index, fresh weight of shoot and root, dry weight of shoot and root decreased with the increase of NaCl salt solutions in the germination media compared to control. Results showed that among the five varieties of tomato, BARI Tomato-20, BARI Tomato-8 were relatively more salt tolerant than BARI Tomato-2 and BARI Tomato-14. To accelerate tomato production in saline prone areas of Bangladesh, it is necessary to identify salt tolerant tomato varieties.
37
Song, Jinxiu, Rong Zhang, Fulin Yang, Jianfeng Wang, Wei Cai, and Yue Zhang. "Nocturnal LED Supplemental Lighting Improves Quality of Tomato Seedlings by Increasing Biomass Accumulation in a Controlled Environment." Agronomy 14, no. 9 (2024): 1888. http://dx.doi.org/10.3390/agronomy14091888.
Full textAbstract:
Tomato (Solanum lycopersicum L. cv. Zhongza NO. 9) was used as the experimental material to investigate the effects of nocturnal LED supplemental light with the photosynthetic photon flux density (PPFD) of 100, 200, 300 μmol·m−2·s−1, and the light time of 1, 2 h on the seedling quality in a controlled environment, with seedlings without nocturnal supplemental lighting serving as the control. The results demonstrate that an increase in PPFD at night progressively enhances the plant height and leaf number of tomato seedlings, while stem diameter and leaf area initially increase and subsequently decrease. Although light time and light period-of-time at night did not significantly affect seedling morphology, PPFD and light time notably influenced chlorophyll content and net photosynthetic rate. An optimal lighting energy amount at night augmented photosynthetic capacity. However, excessive PPFD induced photoinhibition in the leaves. Additionally, appropriate nocturnal LED supplemental lighting significantly improved the antioxidant capacity of the seedlings, increased proline content, reduced malondialdehyde content, and bolstered the self-protection mechanisms of the seedlings against nocturnal light stress. Both the PPFD and light time at night promoted biomass accumulation in tomato seedlings. Specifically, when supplemental lighting was applied for 2 h at an intensity of 200 μmol·m−2·s−1, both the fresh and dry weights of the shoot and root significantly increased, and the seedling health index was highest. Therefore, appropriate nocturnal LED supplemental lighting positively impacts the health index and photosynthate accumulation of tomato seedlings, but controlling PPFD is essential to avoid photoinhibition.
38
Ding, Xiaotao, Chen Miao, Rongguang Li, et al. "Artificial Light for Improving Tomato Recovery Following Grafting: Transcriptome and Physiological Analyses." International Journal of Molecular Sciences 24, no. 21 (2023): 15928. http://dx.doi.org/10.3390/ijms242115928.
Full textAbstract:
Grafting is widely used to enhance the phenotypic traits of tomatoes, alleviate biotic and abiotic stresses, and control soil-borne diseases of the scion in greenhouse production. There are many factors that affect the healing and acclimatization stages of seedlings after grafting. However, the role of light has rarely been studied. In this study, we compared the effects of artificial light and traditional shading (under shaded plastic-covered tunnels) on the recovery of grafted tomato seedlings. The results show that the grafted tomato seedlings recovered using artificial light had a higher healthy index, leaf chlorophyll content, shoot dry weight, and net photosynthetic rate (Pn) and water use efficiency (WUE) compared with grafted seedling recovered using the traditional shading method. Transcriptome analysis showed that the differentially expressed genes (DEGs) of grafted seedlings restored using artificial light were mainly enriched in the pathways corresponding to plant hormone signal transduction. In addition, we measured the endogenous hormone content of grafted tomato seedlings. The results show that the contents of salicylic acid (SA) and kinetin (Kin) were significantly increased, and the contents of indoleacetic acid (IAA) and jasmonic acid (JA) were decreased in artificial-light-restored grafted tomato seedlings compared with those under shading treatments. Therefore, we suggest that artificial light affects the morphogenesis and photosynthetic efficiency of grafted tomato seedlings, and it can improve the performance of tomato seedlings during grafting recovery by regulating endogenous hormone levels.
39
Islam, S. Z., M. Babadoost, and Y. Honda. "Effect of Red Light Treatment of Seedlings of Pepper, Pumpkin, and Tomato on the Occurrence of Phytophthora Damping-off." HortScience 37, no. 4 (2002): 678–81. http://dx.doi.org/10.21273/hortsci.37.4.678.
Full textAbstract:
A study was conducted in the greenhouse to investigate the effects of red light (600-700 nm) on the subsequent occurrence of seedling infection of bell pepper, pumpkin, and tomato caused by Phytophthora capsici. Three- or 4-week-old seedlings were inoculated with zoospores or transplanted into pots filled with artificially infested soil mix. Red light treatment of seedlings reduced Phytophthora damping-off by up to 79%. Only 21% to 36% of red light-treated seedlings became infected, whereas 78% to 100% of the control seedlings, grown either in natural daylight (NDL) or under white light (WL), became infected and died. The height, and fresh and dry weight of seedlings treated with red light were significantly higher than those grown under NDL or WL.
40
Chen, Junne-Jih, Yung-Wei Sun, and Tzay-Fa Sheen. "Use of Cold Water for Irrigation Reduces Stem Elongation of Plug-grown Tomato and Cabbage Seedlings." HortScience 34, no. 5 (1999): 852–54. http://dx.doi.org/10.21273/hortsci.34.5.852.
Full textAbstract:
Seedlings of tomato (Lycopersicon esculentum Mill.) and cabbage (Brassica oleracea L. var. Capitata) were planted in 240-cell plug trays in the greenhouse and subjected to irrigation with water at different temperatures once a day. Irrigation with cold (5 to 15 °C) water reduced stem length of tomato by 28% to 32% in comparison with irrigation with water at room temperature (27.5 to 30.5 °C). Use of water at 10 °C did not affect total shoot dry weight but increased the shoot dry weight per centimeter of stem. Irrigation with water at 5 °C reduced stem length of cabbage seedlings 40%, but use of water at 10 and 15 °C did not. Both shoot and root dry weights were increased by irrigation with water at 10 °C. These results demonstrate that irrigation with cold water provides an effective method for improving the quality of plug-grown seedlings.
41
DJ, Bagyaraj. "Influence of am fungus funneliformis mosseae and k solubilizing bacterium bacillus mucilaginosus on the growth of tomato seedlings raised in pro trays Running head: influence of am fungi and ksb on the growth of tomato seedlings." Journal of Microbes and Research 1, no. 2 (2022): 01–06. http://dx.doi.org/10.58489/2836-2187/006.
Full textAbstract:
Raising vegetable seedlings in pro trays is becoming an innovative approach to produce quality seedlings in horticulture. The present investigation was conducted to evaluate the effect of AMF Funneliformis mosseae and K solubilizing bacterium Bacillus mucilaginosus singly and together in enhancing the growth of tomato seedlings raised in pro trays under polyhouse conditions. Different growth parameters like shoot and root length, total seedling length, stem diameter, dry weight of seedlings, biovolume index, plant strength, vigourindex, macro and micro nutrientuptake, mycorrhizal root colonization and the population of B. mucilaginosus in the root zone soil were monitored. Significantly higher shoot length,root length, stem diameter and biovolume indexwere recorded in the treatments inoculated with F. mosseae alone followed by B. mucilaginosus alone. Most of the plant growth parameters were significantly less in the dual inoculation treatment with F. mosseae + B. mucilaginosus compared to single inoculation with either of them. This brings out the negativeinfluence of the two inoculants on each other leading to a reducedeffect on plant growth.
42
Poot-Poot, Wilberth A., Rafael Delgado-Martínez, Sergio Castro-Nava, Ma Teresa Segura-Martínez, Alejandro Carreón-Pérez, and Jesús Guillermo Hernández-Martínez. "Effect of salicylic acid on pre-transplant acclimatization of native tomato populations." Horticultura Brasileira 36, no. 4 (2018): 480–85. http://dx.doi.org/10.1590/s0102-053620180409.
Full textAbstract:
ABSTRACT The aim of this study was to evaluate the effect of salicylic acid (SA) application on pre-transplant acclimatization of native populations of tomato. SA is a growth regulator that modifies plant growth and development by inducing changes in cell processes, physiology and morphology. Five populations of native tomato were sown in polystyrene trays. Peat moss was used as substrate and plants were maintained at field capacity continuously. After emergence, seedlings were applied during three weeks with different concentration of SA (0.0, 0.01, 0.1, 0.5 and 1.0 μM). A completely random experimental design was used with five replications per treatment. The growth parameters evaluated were height, stem diameter, number of leaves, hypocotyl length, shoot fresh and dry weight (leaves and stem), and root length and fresh and dry weight. An analysis of variance was carried out, and means were compared with the Tukey test (5%) using SAS statistical software. The recorded data show that pre-transplant seedlings of each of the evaluated populations responded significantly (P=0.01) to the SA treatments. Also, the comparison of means of each of the factors under study showed positive changes. With the concentrations of 0.5 and 0.1 μM SA, higher values of the studied variables were obtained than with the concentrations 0.01 and 1.0 μM SA. The native tomato populations sprayed with SA at concentrations of 0.5 and 0.1 μM responded positively in terms of seedling growth and development. Based on these findings, SA treatments can help acclimatize and present better growth conditions to the seedlings before being transplanted.
43
Ruiz-Espin, Alba, Pedro Garcia-Caparros, Alfonso Llanderal, Julian Colunje, Jorge Francisco Moreira, and Maria Teresa Lao. "Physiological and Nutritional Responses to Ozone Application in Tomato Seedling Plants." Agriculture 13, no. 1 (2022): 60. http://dx.doi.org/10.3390/agriculture13010060.
Full textAbstract:
Research on environmentally friendly techniques for the agroindustry is growing constantly. In this sense, the supply of ozone (O3) has been taken into consideration, especially for disinfection because of its high oxidizing power. However, there is not enough information about the application of dissolved O3 via fertigation in crops. For that reason, in this study, two trials were carried out simultaneously to determine the consequences of O3 application on plant growth and quality of tomato plants. The first trial aimed to assess the effects on tomato fertigated with the nutrient solution and the application of O3. The second trial was performed to establish the ideal O3 supply rate for tomato plants. In both experiments, we measured the biometric, physiological, and nutritional parameters of the tomato plant. The results obtained showed that the application of O3 treatment resulted in the highest overall dry weight gain, whereas O3 application decreased leaf proline and total soluble sugars concentrations. There was no clear effect on chlorophyll and total soluble sugars in tomato plants under O3 application. Regarding nutritional parameters, the application of O3 led to a higher content of P and K in tomato plants. These findings indicate that the use of dissolved O3 via fertigation may present several advantages for tomato plants’ growth and quality.
44
López, Henry López, Mariana Beltrán Beache, Yisa María Ochoa Fuentes, Ernesto Cerna Chavez, Epifanio Castro del Ángel, and Juan Carlos Delgado Ortiz. "Phytotoxicity of Extracts of Argemone mexicana and Crotalaria longirostrata on Tomato Seedling Physiology." Plants 12, no. 22 (2023): 3856. http://dx.doi.org/10.3390/plants12223856.
Full textAbstract:
Phytotoxicity caused by secondary metabolites of botanical extracts is a drawback in agriculture. The objective of this study was to evaluate the phytotoxic effects of methanolic extracts of Crotalaria longirostrata and Argemone mexicana on the germination and physiological variables of tomato seedlings. The results indicated that high doses of both extracts (Clong500 and Amex500) inhibited tomato seed germination, while their mixture (Cl50 + Am50) promoted germination by 100%. At 30 days after transplanting (dat), the plant height increased by 15.4% with a high dose of C. longirostrata (Clong500) compared to the control. At 30 dat, the vigor index displayed a notable increase with Cl50 + Am50, reaching 29.5%. The root length increased with the mean dose of A. mexicana (Amex95) at 10, 20, and 30 dat (59.7%, 15.1%, and 22.4%, respectively). The chlorophyll content increased with Amex95 by 66.1% in 10 dat, 22.6% at 20 dat, and 19.6% at 30 dat. On the other hand, Amex95 had a higher nitrogen content throughout the trial. Amex95 produced the greatest increase in root dry weight by 731.5% and 209.4% at 10 and 20 dat. The foliage dry weight increased by 85.7% at 10 dat with Amex95 and up to 209.7% with Amex50 at 30 dat. The present investigation reveals the ability of the extracts to stimulate tomato growth at low and medium doses, though at high doses they exhibit allelopathic effects.
45
Yang, Mengyuan, Dongxian Zhou, Huixian Hang, et al. "Effects of Balancing Exchangeable Cations Ca, Mg, and K on the Growth of Tomato Seedlings (Solanum lycopersicum L.) Based on Increased Soil Cation Exchange Capacity." Agronomy 14, no. 3 (2024): 629. http://dx.doi.org/10.3390/agronomy14030629.
Full textAbstract:
(1) Background: Previous research has demonstrated that the cation exchange capacity (CEC) of soil and the balance of exchangeable cations Ca, Mg, and K are key factors affecting plant growth and development. We hypothesized that balancing exchangeable cations based on increased CEC would improve plant growth and development. (2) Methods: This study conducted a two-phase experiment to evaluate methods for increasing soil CEC and the effects of increasing CEC and balancing Ca, Mg, and K on plant growth. Therefore, we first conducted a soil culture experiment using organic fertilizer, montmorillonite, and humic acid to investigate fertilizers that can effectively increase CEC in the short term. Then, a tomato seedling pot experiment was conducted using the control (CK) and OMHA fertilizer-treated soils collected from soil culture experiments. The CK and OMHA treatment soils were constructed with balanced exchangeable cations and an unbalanced control, respectively. (3) Results: The soil culture experiments revealed that the combination of organic fertilizer, montmorillonite, and humic acid (OMHA treatment) had the most significant effect on increasing CEC. The CEC of the OMHA treatment increased by 41.07%, reaching 27.10 cmol·kg−1. The tomato pot experiments demonstrated that balancing the exchangeable cations in OMHA soil improved the Mg and K nutrition of tomato seedlings and significantly increased SPAD, leaf nitrogen content, and dry weight, while balancing the exchangeable cations in CK soil improved only the K nutrition of tomato seedlings. (4) Conclusions: Overall, balancing exchangeable cations based on increasing CEC can improve soil nutrient availability and alleviate the competition effects of Ca, Mg, and K cations. Low CEC and imbalanced exchangeable cations can be detrimental to tomato seedling growth.
46
Moreno-Pérez, Esaú del Carmen, Felipe Sánchez-del Castillo, Mario Ruiz-Díaz, and Efraín Contreras-Magaña. "Effect of population densities and paclobutrazol applications on seedling quality and yield in tomato." Revista Chapingo Serie Horticultura 27, no. 1 (2021): 5–17. http://dx.doi.org/10.5154/r.rchsh.2020.05.010.
Full textAbstract:
he development of an alternative greenhouse tomato (Solanum lycopersicum L.) production system to obtain four annual growing cycles requires delaying transplantation from 50 to 60 days after sowing (das). The study objectives were to evaluate the effects of paclobutrazol applications and population densities in the seedbed on the quality of seedlings to be transplanted at 60 das, and on the number of flowers and yield of plants pruned to three clusters. A randomized complete block experimental design was used with a split-plot arrangement with four replicates and 16 treatments that resulted from combining two population densities (150 and 300 seedlings∙m-2) and seven paclobutrazol treatments (one, two and three applications with 25 and 50mg∙L-1 of active ingredient), plus two controls (without application). The lower density in the seedbed resulted in lower height, larger stem diameter and higher seedling dry weight at 60 das; however, at the end of the growing cycle the number of flowers and the yield per plant were lower. Triple applications of paclobutrazol, with 25 and 50 mg∙L-1, significantly decreased height and leaf area, but dry weight and stem thickness were similar to the control. Triple application of paclobutrazol resulted in two flowers and two more fruits per plant compared to the control, possibly because the temporary arrest of vegetative growth, caused by paclobutrazol, left more photoassimilates available for the inflorescences in formation.
47
He, X. J., W. W. Zhu, and F. Z. Wu. "Effects of crop rotations on microbial community in rhizosphere soil of cucumber seedlings and its feedback." Allelopathy Journal 52, no. 2 (2021): 239–50. http://dx.doi.org/10.26651/allelo.j/2021-52-2-1318.
Full textAbstract:
We studied the effects of 7-crop rotations and continuous - monocropping systems on soil microorganism and its feedback. The results showed that absolute abundance of soil bacteria (Pseudomonas and Bacillus) in tomato - celery - cucumber - cabbage and cucumber - tomato - cucumber - cabbage rotation were significantly higher than control (CK). Absolute abundance of soil fungi in tomato - celery - cucumber - cabbage, kidney bean - celery - cucumber - cabbage, cucumber - kidney bean - cucumber - cabbage and cucumber - tomato - cucumber - cabbage rotation were significantly higher than CK. Dry weight of cucumber seedlings was significantly positively correlated with bacterial (Pseudomonas and Bacillus) abundance, and negatively correlated with fungal count. The results of inoculation with Fusarium oxysporum f.sp. cucumerinum showed that plant dry weight of cucumber seedlings in tomato - celery - cucumber - cabbage, cucumber - kidney bean - cucumber - cabbage, cucumber - tomato - cucumber - cabbage rotation soil was significantly higher than other treatments, and their disease index was significantly lower than other treatments. There was no significant difference in dry weight of cucumber seedlings in rotation and CK in the soil sterilization test. The results of plant - soil feedback experiment showed that soil microbial changes caused by different rotation patterns had a positive feedback effect on growth of cucumber seedlings.
48
Sivakumar, J., and P. Osman Basha. "Response of Solanum lycopersicum L. Genotypes to Saline Stress on Seed Germination and Seedling Stage." Asian Journal of Plant and Soil Sciences 8, no. 1 (2023): 59–65. http://dx.doi.org/10.56557/ajopss/2023/v8i195.
Full textAbstract:
Salt stress is one of the abiotic factors that restricted crop growth and productivity. One of the crucial approaches for addressing this issue is screening-based selection of germplasms that are resistant to salt stress. Seed germination and seedling development are the crucial stages of plant development that are most significantly affected by salt stress. The current study's objective is to compare the responses of 15 tomato genotypes to two different salt stress conditions. Experimental analysis of present research was carried in Agri-Science park laboratoty, Yogi Vemana University, YSR Kadapa at 2018. Tomato seeds were allowed to grow for ten days at control (non-saline), 75 mM and 125 mM salt stress conditions and analyzed the germination percentage, shoot lengths, root lengths, fresh weight, dry weight, and stress tolerance trait indices. All the studied variables have shown gradual decreases as a result of increased salt stress. The EC 251649, EC 251581, EC 164329, and EC 523851 genotypes has shown better germination than the other genotypes under tested stress conditions. The genotypes IC 164656 and EC 315478 have better fresh weight and dry weight under 125 mM salt stress, while the EC 177297 genotype has healthier root and shoot lengths among the studied germplasms. Our results revealed that a greater proportion of the variation in the parameters was accounted for type of germplasms. It can be inferred that seedling traits may serve as a valid criteria for choosing genotypes that are more tolerant of salinity stress at seedling stage.
49
Odell, Gerald B., Daniel J. Cantliffe, Herbert H. Bryan, and Peter J. Stoffella. "Stand Establishment of Fresh-market Tomatoes Sown at High Temperatures." HortScience 27, no. 7 (1992): 793–95. http://dx.doi.org/10.21273/hortsci.27.7.793.
Full textAbstract:
Primed, pregerminated, or nontreated tomato (Lycopersicon esculentum Mill.) seeds were field-sown with several soil amendments to assess stand establishment at high temperatures. Soil amendments did not consistently improve tomato stand establishment. However, covering seeds with a fine-textured calcined montmorillonite clay (Growsorb) resulted in similar or improved total percent emergence, emergence rate, and seedling shoot dry weight as compared to the soil cover (control) for nontreated, primed, or pregerminated seeds. Plug-mix (a peat-vermiculite medium) or gel-mix [a 1:1 mixture (v/v) of plug-mix and gel, starch-acrylate copolymer, or polyacrylate polymer], covered over or mixed with nontreated, primed, or pregerminated seeds, did not consistently improve total percent emergence over the soil cover. However, soil amendments generally resulted in faster emergence than the soil cover. Pregerminated seeds imbibed for 60 or 72 hours at 25C generally resulted in reduced stands compared to primed or nontreated seeds. Moisturized seeds imbibed for 48 hours at 25C had faster emergence and heavier seedling shoots than nontreated seeds, regardless of soil amendment. However, primed seeds generally resulted in faster emergence and more plants with heavier seedling shoot weights than nontreated or pregerminated seeds sown at high temperatures.
50
Zhang, Yao, Yingying Li, Sibo Liang, et al. "Study on the Preparation and Effect of Tomato Seedling Disease Biocontrol Compound Seed-Coating Agent." Life 12, no. 6 (2022): 849. http://dx.doi.org/10.3390/life12060849.
Full textAbstract:
Tomato damping-off and root rot are the two most common diseases of tomatoes at the seedling stage. At present, biological compound seed-coating agents are gradually replacing chemical agents in preventing and controlling plant diseases and insect pests, regulating plant growth, and ensuring crop yields. In this study, five biocontrol bacteria (Bacillus amyloliquefaciens (Ba), Bacillus subtilis (Bs wy-1), Bacillus subtilis (WXCDD105), Pseudomonas fluorescens (WXCDD51), and Bacillus velezensis (WZ-37)), with broad antibacterial spectra were mixed with auxiliary factors (inactive components of seed-coating agent) after fermentation to compound a seed-coating agent. In this study, the formula for a compound seed-coating agent was selected through orthogonal experiment. Gaseous silica was used as a thickener, and gum arabic and sodium dodecylbenzene sulfonate were used as a film-forming agent and dispersant, respectively. The mass of fumed silica, gum arabic, sodium dodecylbenzene sulfonate, and pearlescent powder was 1.3 g, 1 g, 0.05 g, and 0.5 g respectively. Adding gibberellin can improve the ability of seed-coating agents to promote seed germination and plant growth. This showed high efficiency in preventing and controlling seedling diseases and promoting seedling growth. After 6 days of inoculation with Pythium aphanidermatum, which caused tomato damping-off disease, the seedling mortality rate was 26.7% lower than that of the sterile water control, and 20% lower than that of carbendazim. After 21 days of inoculation with Fusarium sp., which caused tomato root rot disease, the seedling mortality rate was 44.31% lower than that of the control, and 22.36% lower than that of carbendazim. The plant height, stem diameter, root length, fresh weight, and dry weight of tomato seeds treated with biological compound seed-coating agent were significantly higher than that of the control. We tested the shelf life of the biological compound seed-coating agent, and found that the effect of seed germination and radicle growth did not decrease. This research provides information on the production technology and application of biological seed-coating agents in tomato production.