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1
Botova, Anastasiya Vladimirovna, and Svetlana Valer'evna Mukhametova. "Dynamics of gladiolus leaves growth." Сельское хозяйство, no. 1 (January 2022): 17–26. http://dx.doi.org/10.7256/2453-8809.2022.1.38291.
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Gladiolus L. are beautifully flowering perennials that do not overwinter in the open ground in the conditions of central Russia. Its varieties are characterized by a huge variety in the height of the peduncle, the color scheme and the corrugation degree of the flowers. The disadvantage of this crop is the complexity of the annual digging and planting of corms. The purpose of the article is to study the growth dynamics of real gladiolus leaves in the open ground. Leaf height measurements were carried out after 15 days in the process of growing plants on ridges. The objects of the study were 9 varieties: 'Aurora', 'Granatovyj braslet', 'Grad Kitezh', 'Devichi tajny', 'Dolgozhdannyj debyut', 'Majya Plisetskaya', 'Tanyusha', 'Shapka Monomaha', 'Noon Moon'. The study showed that the most intensive growth of gladiolus leaves occurred after the emergence of sprouts. On the 20th day after planting, the plants reached about 1/3 of their final height, and on the 35th day – 50%, after 2 months – the height was almost 90%. Most varieties were characterized by the greatest increase in the first accounting period, in the future its value decreased, reaching a minimum in the last accounting period. In the process of growth, the taller varieties remained tall, the shorter ones remained stunted. At each date of the study, 'Devichi tajny' had the highest height, 'Grad Kitezh' had the lowest height. The obtained data can be used in the cultivation of gladioli in nurseries and landscaping location.
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Mitchison, Graeme. "Conformal growth of Arabidopsis leaves." Journal of Theoretical Biology 408 (November 2016): 155–66. http://dx.doi.org/10.1016/j.jtbi.2016.08.023.
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Rudiyanti, Siti. "Toxicity of Extract Tobacco Leaves to The growth of Oreochromis niloticus." Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology 6, no. 1 (February 22, 2012): 56–61. http://dx.doi.org/10.14710/ijfst.6.1.56-61.
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Tobacco can be used as natural pesticide since it contained high concentration of nicotine that may killed pest and fish diseases. This work aimed to know the influence and inhibiting concentration of tobacco leaves extract to the growth of Tilapia. The research was conducted on March to May 2007 at laboratory of Satker PBIAT Ngrajek, Magelang. Fish fry used were in between 1,74±0,105 g with the density of 10 were tested in 20 L fresh water, were tested using several concentration of tobacco leaves extract. Sub lethal toxicity tested in the laboratory using complete random design for 28 days. The result showed that LC50 -96 hours is 22,492 mg/L. It is shown that extract of tobacco leaves has a significant influence to the fish growth. The highest absolute biomass growth is at treatment K (3,72 g), followed by treatment A (3,29 g), B (2,96 g), C (2,75 g), and D (2,24 g). Whereas the highest daily growth rate is also at treatment K (3,93 %), followed by A (3,75 %), B (3,59 %), C (3,45 %), and D (3,06 %). The inhibiting concentration (IC 50) is 15,733 mg/L. Water quality during the experiment indicated a suitable condition for fish life medium. Key Words : Extract of tobacco leaves, Tilapia fry, Growth
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He, Hua, and Xiao Hua Yi. "Effect of Root Zone Aeration on the Growth of Film-Mulched Tomato in Greenhouse." Applied Mechanics and Materials 675-677 (October 2014): 1087–90. http://dx.doi.org/10.4028/www.scientific.net/amm.675-677.1087.
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Due to film-mulched cultivation and poor irrigation practices, low oxygen stress could be often caused in root zone in greenhouse, and has negative effects on crops growth. In this study, a barrel experiment was conducted to probe the effects of root zone aeration on tomato (Lycopersicon esculentum Mill) leaves, root systems and biomass accumulation, using calcium peroxide (CaO2) as oxygen release agent. The results show that i) root zone aeration has little effect on the number of leaves and leave chlorophyll content, while reduces leaf areas of per leave and per plant, ii) root zone aeration could promote the growth and development of roots through increasing the volume, absorption area, specific surface area and total length of tomato roots and iii) root zone aeration raises the biomass of tomato plants, which mainly manifests in the increase of stems and leaves, especially in leaves.
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Ikhsan, Shara Lutfiyona, Detty Iryani, and Nelvi Yohana. "PERBANDINGAN EFEKTIVITAS DAYA HAMBAT INFUSUM DAUN SIRIH (PIPERBETIE L) DAN DAUN MENGKUDU (MORINDA CITROFILIA L) TERHADAP PERTUMBUHAN JAMUR CANDIDA ALBICANS." Andalas Dental Journal 2, no. 2 (October 7, 2014): 121–27. http://dx.doi.org/10.25077/adj.v2i2.120.
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Many people tend to consider using plants for medicine. Beatle’s leaves are contained of some active substance such as kavikol,kavibetol and eugenol while mengkudu’s leave have active substance such as Scalopoetin ,antrhakuinon and saponin that known as antifungi. One of fungi as the main agent of Candidiasis diseases in mouth is Candida albicans. The purpose of study is to compairing the difference inhibitions activity of infusion beatle’s Leaves (Piper beatle L) and infusion mengkudu’s leaves (Morinda citrofilia L) against Candida albicans growth. The Study use dilution method to determine of Minimun Inhibitory Concentration (MIC). This research using 32 sample of infusion beatle’s leaves and infusion mengkudu’s leaves and mixing with Candida albicans and then incubation with Sabouroud Dextrose Broth media. The result is concentration 80% of infusion beatle’s leaves had an inhibitions power against Candida albicans growth. Concentration 100% infusion mengkudu’s leaves had an inhibitions power against Candida albicans growth.The Conclusion of the study is concentration needed of infusion beatle’s leaves low than infusion mengkudu’s leaves for inhibition against Candida albicans growth.
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Maksymowych, Roman, and Joseph A. J. Orkwiszewski. "Allometric growth of Xanthium (Compositae) leaves." Acta Societatis Botanicorum Poloniae 66, no. 3-4 (2014): 293–96. http://dx.doi.org/10.5586/asbp.1997.033.
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When <em>Xanthium</em> lamina width is plotted versus leaf length during the entire period of growth, a straight line is obtained representing an allometric relationship with a regression correlation coefficient of 0.9973 a lamina width to length ratio of 0.502 ± 0.01 and chordate morphology. On the other hand, gibberellic acid treated plants yield a correlation coefficient of 0.9871 a lamina width to length ratio of 0.372 ± 0.0074 and lanceolate leaves. The fraction of leaf width to leaf length is a measure of lamina width reduction. Gibberellic acid alters the mechanism which controls the balance between the leaf length and the leaf width.
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Taqi, Raza, Hasnain Kazmi Zurriat, Arshad Ullah Muhammad, Kanwal Iqra, Imran Shakeel, Ahmad Rizwan, and Ishtiaq Hyder Syed. "Comparative Effectiveness of Different Growth Media on Growth, Biomass and Morphology Features of Kinnow Mandarin Seedling." Food Processing & Nutritional Science 1, no. 1 (June 30, 2020): 1–7. http://dx.doi.org/10.46619/fpns.2020.1-1001.
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An experiment was conducted at the University of Agriculture, Sub-campus Burewala Vehari during spring 2018 to investigate the most effective growth media for the growth of kinnow Mandarin seedlings along with highest potential of root, shoots, branches and leaves growth. The growing media is crucial for better plant growth and development. Seeds of Kinnow Mandarin were sown in twelve (12) different composite media (made from different proportions of peat moss, coco coir, compost, baggase, and soil) in CRD with three repeats. Data regarding germination of kinnow seeds and seedling quality parameters (Fresh weight, dry weight, seedling length, root shoot ratio, dry matter contents) were recorded during the experiment. The results proved that the peat moss was the most efficient among all the other growing media for producing the maximum number of leaves, shoot length, root length and seedling length while, compost was found to be a most effective medium for maximum seed germination. The composition in 1:1 of baggase + peat moss was most prominent to produce leaves with larger surface areas. Therefore, peat moss is an effective growth media among other growing media for Kinnow production.
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Haffner, Oto, Erik Kučera, Peter Drahoš, Ján Cigánek, Alena Kozáková, and Barbora Urminská. "Lemna minor Bioassay Evaluation Using Computer Image Analysis." Water 12, no. 8 (August 5, 2020): 2207. http://dx.doi.org/10.3390/w12082207.
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This article deals with using computer vision in the evaluation of the Lemna minor bioassay. According to the conventional method, the growth of Lemna minor mass is determined from the number of leaves grown. In this work, instead of counting individual leaves, we propose measuring the area occupied by the leaves using computer vision and compare the new approach with the conventional one. The bioassay is performed according to the ISO 20079 standard as a 168 h growth inhibition test; the aim of the experiment was to quantify the negative effects on the vegetative growth using two parameters—the number of leaves and the area occupied by the leaves. The method based on image processing was faster and also more precise since it enabled us to detect the negative effect of the tested substance on leave size, not only on their number. It can be concluded that the toxic effect has shown to be more significant when considering the leaves area rather than the number of leaves. Moreover, mistakes caused by human factor during leaves counting are eliminated using the computer vision based method.
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Abdulrahman, Pola Manaf, and Jassim Mohammed Khalaf. "Effect of Pruning Treatments and the Addition of Humic Acid on Growth and Yield of Zaytoni Cultivar Grape Trees." IOP Conference Series: Earth and Environmental Science 1158, no. 2 (April 1, 2023): 022012. http://dx.doi.org/10.1088/1755-1315/1158/2/022012.
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Abstract This study was conducted in one of the private orchards located in the Altun Kobri sub-district of Dibs district, about (20) km away from Kirkuk governorate, during the growing season (2020-2021). This is to study the effect of six levels of summer pruning, the first level (T1) without pruning, the second level (T2) removing the tops of the main branches after the decade, and the third level (T3) removing the tops of the main branches after the decade and the fourth level (T4) removing leaves and leaving (8) Leaves for each fruit cluster, the fifth level (T5) remove the leaves and leave (10) leaves for each fruit cluster, the sixth level (T6) remove the leaves and leave (12) leaves for each fruit cluster. And the addition of three levels of humic acid (zero, 20, 40) g. vine-1 and its symbol (H1, H2, H3) sequentially, in the growth and yield characteristics of grape vines of the olive variety, and it was added a week after the contract (25/5/2021). The experiment was carried out according to a randomized complete block design with three sectors.
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Tang, An‐Ching, and John S. Boyer. "Growth‐induced water potentials and the growth of maize leaves." Journal of Experimental Botany 53, no. 368 (March 1, 2002): 489–503. http://dx.doi.org/10.1093/jexbot/53.368.489.
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Remphrey, W. R., and C. G. Davidson. "Shoot and leaf growth in Fraxinuspennsylvanica and its relation to crown location and pruning." Canadian Journal of Forest Research 24, no. 10 (October 1, 1994): 1997–2005. http://dx.doi.org/10.1139/x94-256.
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Elongation of shoots in various crown locations, and of individual internodes and leaves of the leading shoot, were recorded at 2-day intervals throughout the 1991 growing season in four clones of Fraxinuspennsylvanica var. subintegerrima (Vahl) Fern. (green ash). Other trees were disbudded and pruned to a single leader. Using a logistic growth function, nonlinear regression equations were generated and parameter estimates were used to determine maximum growth rates. Terminal leading shoots had a longer growth duration and a greater maximum growth rate than lateral shoots. The pruning treatment resulted in larger shoots, which grew 2–3 weeks longer and had a higher maximum growth rate. Leaf emergence occurred at regular intervals but the rate of emergence varied among clones. Leaf maximum growth rates were not significantly different among clones. Leaf size declined acropetally whereas internode length increased and then decreased. The longest leaves and internodes had the highest maximum growth rates. The size and maximum growth rates of putative preformed leaves were larger than putative neoformed leaves. As a shoot expanded, growth of one internode tended to cease during the linear phase of growth of its associated leaf and that of the succeeding internode.
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Nurjanah, Raynesa Nurul, Widya Hermana, and Yuli Retnani. "Influenced of the Liquid Chaya Leaves (Cnidoscolus aconitifolius) Supplementation on Growth Performance of the Quails." Jurnal Ilmu-Ilmu Peternakan 33, no. 2 (August 1, 2023): 197–206. http://dx.doi.org/10.21776/ub.jiip.2023.033.02.07.
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The purposed of this study was to analysed the influenced of liquid Chaya leave (Cnidoscolus aconitifolius) to drinking water of quail starter. A total 30 Day-Old-Quail (DOQ) were used in this research. The experimental design in this study used a Completely Randomized Design (CRD) with 4 treatments and 5 replications. The treatment consisted T0 = control; T1 = drinking water added Vita Chick; T2 = drinking water containing 2,5% chaya leaves extract; and T3 = drinking water containing 5% chaya leaves extract. Data were analyzed by analysis of variance (ANOVA), if there were significantly different results, Duncan's test was performed. The study showed that chaya leaves extract supplementation had no significant effect (p >0.05) for water intake, feed intake (FI), body weight (BW), feed conversion ratio (FCR) and mortality of quail starter. In summary, Chaya leaves infusion supplementation as much as 2.5% and 5% through drinking water with a frequency of twice a week has the best body weight gain and feed conversion ratio. Further research is needed regarding the effect of administering chaya leaves infusion, and the concentration of chaya leaves infusion on the laying period of quail eggs.
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Çavuşoğlu, K., S. Kılıç, and K. Kabar. "Effects of pretreatments of some growth regulators on the stomata movements of barley seedlings grown under saline (NaCl) conditions." Plant, Soil and Environment 53, No. 12 (January 7, 2008): 524–28. http://dx.doi.org/10.17221/2193-pse.
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In this work, the effects of double, triple and quadruple combinations of gibberellic acid, kinetin, 24-epibrassinolide and polyamines (cadaverine, putrescine, spermidine, spermine) on the stomata movements in the leaves of barley seedlings grown under saline conditions were studied. In the control seedlings, the stomata number, stomata index and stomata length increased in the upper surfaces of leaves in comparison with their lower surfaces. In addition, the epidermis cell number in the leaves of control plants were fewer in the upper surface than that in the lower surface, but the stomata were statistically in the equal width in both surfaces. As for the applyings, they generally decreased stomata number, stomata index, stomata length and epidermis cell number, while they increased the stomata width in the upper and especially in the lower surface according to the control. The growth regulators used may have served to adaptation of barley seedlings to saline conditions by causing a decrease in most of the mentioned parameters.
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Wolak, Robert A. "Growth of leaves in transversely affine foliations." Proceedings of the American Mathematical Society 127, no. 7 (March 1, 1999): 2167–73. http://dx.doi.org/10.1090/s0002-9939-99-04648-1.
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Jahan, MN, MA Hasan, and MR Islam. "Effect of Defoliation on Growth and Yield of Maize." Bangladesh Agronomy Journal 25, no. 2 (May 7, 2023): 31–41. http://dx.doi.org/10.3329/baj.v25i2.65927.
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The experiment was conducted to evaluate the effect of defoliation on grain and fodder yield of maize at the research field and laboratory of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur during the period of December 2018 to June 2019. The trial was carried out in a randomized completely block design with three replications. The experimental treatments were: T1– Control (without leaf removal), T2–Defoliating all leaves except ear and adjacent two leaves above the ear at 7 days after silking (DAS), T3–Defoliating all leaves except ear and adjacent two leaves above the ear at 14DAS, T4–Defoliating all leaves below the ear at 7 DAS, T5–Defoliating all leaves below the ear at 14 DAS, T6– Detopping except two leaves above the ear at 7 DAS and T7–Detopping except two leaves above the ear at 14 DAS. Light intensity was increased (66.9 to 81.05%) when only lower leaves (T5) or both upper and lower leaves (T2) were removed, but when only the upper leaves (T6) were removed it was not increased. SPAD value was increased (13.58 to 24.5%) but number of leaves and leaf area plant-1 were reduced (60.5 to 63.09% and 64.4%) due to defoliation. Substantial amount of green fodder was obtained (0.776 Kg m-2) due to defoliation of maize. Grain yield of maize was reduced (5.56 to 21.83%) due to different defoliation treatments but the yield reduction was not significant when only lower (T4) or upper (T7) leaves were removed.
Bangladesh Agron. J. 2022, 25(2): 31-41
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HIRAISHI, S., K. ISHII, S. MATSUYAMA, H. SUGAI, Y. MIURA, M. KARAHASHI, Y. NOZAWA, S. YAMAUCHI, H. YAMAZAKI, and T. TADA. "PIXE STUDY ON THE GROWTH ENVIRONMENT OF PLANTS." International Journal of PIXE 22, no. 01n02 (January 2012): 201–6. http://dx.doi.org/10.1142/s0129083512400116.
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Growth environment of plants was investigated by analyzing the elemental concentration in leaves of the plants. Camellia was selected as the sample and the leaves of the camellias were collected from Miyagi and Chiba prefectures. The species of elements and their concentrations in the leaves were measured by the in-air PIXE system at Tohoku University. More than 10 elements were detected from the leaves. The concentrations of Mn , Fe , and Rb in the leaves were strongly affected by the place where the tree grew. On the other hand, the concentration of P, S, K, and Ca were less affected by the place of the tree. The determination of the place of the tree was also performed by evaluating the similarity of the elemental concentration in the leaves quantitatively. The difference due to the place was clearly identified and the sampling place was successfully determined by using the elemental concentrations in the leaves.
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Roper, Teryl R., and John S. Klueh. "Removing New Growth Reduces Fruiting in Cranberry." HortScience 29, no. 3 (March 1994): 199–201. http://dx.doi.org/10.21273/hortsci.29.3.199.
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The sources of photosynthate for fruit growth in cranberry (Vaccinium macrocarpon Ait.) can be spatially partitioned as new growth, old leaves and woody stems, or adjoining uprights. New growth, l-year-old leaves, or both were removed at the time of fruit set and following fruit set. Removing new growth at the time of fruit set reduced fruit set, fruit count, and yield. Removing old leaves at fruit set generally did not reduce fruit set, fruit count, or yield. Removing both often had an additional effect. Removing new leaves after fruit set did not affect fruit set or count, but did reduce fruit size. Removing old leaves after fruit set did not reduce fruit set, fruit count, or size. These data suggest that new growth is an important source of photosynthate for fruit set.
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Uemura, Shigeru. "Patterns of leaf phenology in forest understory." Canadian Journal of Botany 72, no. 4 (April 1, 1994): 409–14. http://dx.doi.org/10.1139/b94-055.
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Foliar phenologies of forest understory plants were categorized, and the distribution pattern of leaf habit was examined among different forest environments. Various patterns of foliar phenology were found, especially in herbaceous plants. In addition to the seasonal light regime controlled by the phenology of canopy trees, differences in the length of period with snow cover led to the divergence. Perennial-leaved plants predominate in intensely shaded habitats while annual-leaved plants are more abundant in less shaded habitats. The shade tolerance of perenniel-leaved plants can be considered a preadaptation to snow tolerance. In contrast with the perennial-leaved plants, biennial-leaved plants with leaves overwintering 1 year appear to be favored in euphotic habitats with high insulation both in spring and in autumn. These species are effective competitors in spring because of rapid emergence of current leaves, probably through retranslocation of resources accumulated in the previous year. Another adaptive trait is found in heteroptic plants simultaneously having summer-green leaves and overwintering leaves; these types of leaves seem to function in predictable and quite different environments in a year. Key words: foliar phenology, growth form, light resource, overwintering leaf, snow cover.
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Błażewicz-Woźniak, Marzena, Agnieszka Rybicka, and Monika Fil. "Growth, decorative and nutritional values of ornamental cabbage (Brassica oleracea L.) in flowerbed conditions." Horticultural Science 48, No. 1 (March 31, 2021): 30–37. http://dx.doi.org/10.17221/21/2020-hortsci.
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Ornamental cabbages are cultivars of cabbages grown for decorative purposes due to the varied shape and colour of their internal leaves. The aim of the study was to determine the course of growth and to assess the decorative and nutritional value of two cultivars of ornamental cabbage (‘Pigeon Red’, ‘Coral Prince’) grown in a flowerbed along with annual plants: the French marigold (Tagetes patula nana L.) and flossflower (Ageratum houstonianum Mill.), using a pine bark mulch. The impact of the marigold and flossflower on the cabbage height and foliage changed with the plant growth. Cabbages growing without the proximity to the other species had the smallest diameter and formed the least leaves; and the plant’s height was lower in September. The cabbage height, foliage and leaf colour were modified by the weather in the subsequent years of research. The proximity of the marigold or flossflower and mulching of the soil with bark did not affect the colour of the leaves. The nutritional value of the ornamental cabbage was high, and the content of the mineral components in the leaves depended largely on their colour. The coloured leaves were more abundant in nitrogen, phosphorus, potassium and magnesium, while the green leaves contained more calcium and sulfur, and slightly more dry matter.
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Santoso, Budi, I. Gusti Bagus Sila Dharma, and Elok Faiqoh. "Pertumbuhan dan Produktivitas Daun Lamun Thalassia hemprichii (Ehrenb) Ascherson di Perairan Tanjung Benoa, Bali." Journal of Marine and Aquatic Sciences 4, no. 2 (November 8, 2017): 278. http://dx.doi.org/10.24843/jmas.2018.v4.i02.278-285.
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Thalassia hemprichii is one of the seagrass as favorite food of two protected herbivores such as Green Turtle and Dugong. The existence of Thalassia hemprichii and knowing the growth rate becomes very important for sustainability of two herbivores. The study was conducted in Tanjung Benoa waters that covering three parts of the coast such as Samuh, Conrad and Tanjung beach in February until March 2017. Thalassia hemprichii leaves growth is observed consist of long and heavy growth (dry weight) and measured leaf age that has been observed such as young, half old and old leaves. The method that used to measure the growth of Thalassia hemprichii is pruning method and determination the research location using purposive sampling method. The aim of this research is explained the growth rate, biomass, and productivity of young leaves, old leaves of Thalassia hemprichii in Tanjung Benoa Bali. Measurement results of Thalassia hemprichii growth between age group of leaves has different young leaves faster growth if compared with the half old leaves and old leaves with average growth is 3.41mm/day indicates that the efficiency of this seagrass growth will decrease as the leaves age. The highest biomass values ??were found in older leaves if compared with young leaves and half-old leaves with average 0.205 gbk/m2 expected because the thick and wide leaf size will produced larger leaf biomass. The highest productivity value is found in oldest leaves in each station with average 0.028 gbk/m2/day expected morphology and different nutrient content in each leaf tissue.
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Stopińska, Jadwiga. "Studies on the interaction of growth regulators with potassium ions in some physiological processes in the bean (Phaseolus vulguris L.). II. The effect of potassium on growth of bean leaves and on their potassium and hormone levels." Acta Societatis Botanicorum Poloniae 55, no. 2 (2014): 209–25. http://dx.doi.org/10.5586/asbp.1986.021.
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The subject of study was the effect of K on the growth of primary and trifoliate leaves of the bean and on their potassium and hormone levels. Bean seedlings were grown in Hoagland's water solution in which the potassium concentrations (K –NO<sub>3</sub>,) were 1 and 3 mM. The increase in the amount of potassium in bean leaves. elicited by increased K concentration in the medium or by partial defoliation. was correlated with a stimulation of growth of these organs and an increase in their H<sub>2</sub>O content. These effects were connected with an increase in the amount of ABA and bound GA and decrease in the amount of auxins. The effect of potassium on the level of free gibberellins and cytokinins depended on the kind of leaves. In young, i.e. trifoliate leaves_ K was found to have a positive effect on the level of free GA, whereas in older. i.e. primary leaves, this effect concerned the level of cytokinins.
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Wang, Chien Y. "Methyl Jasmonate Inhibits Postharvest Sprouting of Radishes." HortScience 33, no. 3 (June 1998): 458b—458. http://dx.doi.org/10.21273/hortsci.33.3.458b.
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Treatment of topped radishes (Raphanus sativus L., cv. Cherry Belle) with methyl jasmonate was effective in inhibiting postharvest sprouting of new leaves and the growth of roots. Radishes were trimmed to 10-mm tops and dipped in various methyl jasmonate suspensions for 3 min. After storage at 15 °C for 7 days, the growths of new leaves were 26, 22, 7, 3, and 1 mm in 0, 10–5, 10–4, 10–3, or 2 × 10–3 M methyl jasmonate-treated radishes, respectively. The lengths of root growth were also reduced by methyl jasmonate particularly at higher concentrations. These treatments also substantially reduced weight loss possibly as a secondary effect. Fumigation with methyl jasmonate vapor in enclosed containers was also effective in inhibiting the sprouting of leaves and root growth, but to a lesser extent than dipping treatments. Radishes stored at 0 °C did not show any new growth of leaves or roots, and therefore were not affected by the methyl jasmonate treatments.
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Barlow, EWR. "Water Relations of Expanding Leaves." Functional Plant Biology 13, no. 1 (1986): 45. http://dx.doi.org/10.1071/pp9860045.
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The reactivity of leaf growth to changes in plant water status has been analysed in terms of leaf development, water transport and turgor. The different growth patterns of monocotyledonous and dicotyledonous leaves result in fundamental differences in the water relations of expanding leaves. Most monocotyledonous leaf cells complete their expansion phase within the protective older leaf bases, while the majority of dicotyledonous leaf cells expand in an exposed evaporative environment. The consequence of this morphological difference is that expanding monocotyledonous leaves behave similarly to other enclosed tissue during water stress by exhibiting turgor maintenance through osmotic adjustment. Expanding dicotyledonous leaves do not exhibit this response. The maintenance of turgor in monocotyledons in the absence of leaf expansion suggests that growth is controlled by the yield threshold of the cell wall during episodes of water stress.
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Bandu, Vivi S., D. A. Kaligis, Rustandi ., and W. B. Kaunang. "PENGARUH LEVEL PUPUK BOKASHI KOTORAN AYAM TERHADAP PERTUMBUHAN SORGUM BROWN MID RIB (BMR)." ZOOTEC 38, no. 1 (December 28, 2017): 77. http://dx.doi.org/10.35792/zot.38.1.2018.18533.
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EFFECT OF BOKASHI FERTILIZER LEVEL CHICKEN MANURE ON THE GROWHTH OF BROWN MID RIB (BMR) SORGHUM. The purpose of the present research was to determine effect of bokashi fertilizer level chicken manure on the growhth of brown mid rib (bmr) sorghum. The research was used in a completely randomized design arrangement, with 4 treatments and 7 replications. Treatments were formulated as follow : b1 = 0 g/polybag, b2 = 200 g/polybag, b3 = 400 g/polybag, b4 = 800 g/polybag. Parameters measured were : plant height, number of leaves length of leaves. Research result showed that, bokashi fertilizer of chicken manure gave a significant different (p<0,05) on plant height, number of leaves leaves length of brown mid rib sorghum. Based on the research result, it can be concluded that, the utilization of bokashi fertilizer level chicken manure with 200 g/polybag, enough to support the growth of plant height, number of leaves and leaves length of brown mid rib sorghum.Keywords : Bokashi Fertilizer Level Chicken Manure, Brown Mid Rib Sorghum, Growth.
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Yulianti, Ida, Yulian Fakhrurrozi, and Sri Rahayu. "PERTUMBUHAN SETEK BEBERAPA VARIETAS Hoya coronaria DARI KAWASAN HUTAN KERANGAS AIR AINYIR, BANGKA." EKOTONIA: Jurnal Penelitian Biologi, Botani, Zoologi dan Mikrobiologi 3, no. 1 (June 15, 2018): 1–10. http://dx.doi.org/10.33019/ekotonia.v3i1.750.
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The research on vegetative propagation of several H. coronaria varieties from heath forest of Air Anyir Bangka, is the first step to cultivate as well as for conservation purpuses. This research purpose to study the growth of stem cutting from several H. coronaria varieties as well as to find the best cutting method. This research was done on Oktober 2015 until January 2016 at trial house on Gabek 2, Pangkalpinang. The experiment applied randomized factorial completely design of 2 factors with 15 level combinations. The first factor is 5 variety of H. coronaria and the second factor is 3 cutting methods with different leaves numbers. Three replications was applied with 3 cutting each of replications. The parameters were observed on the establishment of cuttings (life cutting presentation), root length, root total number, shoot total number, shoot length, stem diameter, leaves total number, leaf wide and internode total number. The result showed that most of all growth parameters except stem diameter were significantly influenced by the varieties differences. All growth parameters were also significantly influenced by the cutting methods as well as all treatment interaction. This result was assumed influence by cutting age an 7 weeks. The best fast growth varieties was variety 5. The best cutting method was 4 leaves cutting. The best treatment interaction was variety 4 with 4 leaves cutting. The slowest growth varieties was variety 1, and the slowest cutting was non leaves cutting. This result were assumed influencing by some factors such us the numbers of leave, nutrition, hormone, genetic and environment.
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Tang, Xinglin, Guangzheng Liu, Jiang Jiang, Changju Lei, Yunxing Zhang, Liyan Wang, and Xinliang Liu. "Effects of growth irradiance on photosynthesis and photorespiration of Phoebe bournei leaves." Functional Plant Biology 47, no. 12 (2020): 1053. http://dx.doi.org/10.1071/fp20062.
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Light intensity is a major environmental factor affecting the growth and survival of trees in a forest. The effect of light reduction on photosynthesis and photorespiration of an evergreen broad-leaved tree, Phoebe bournei (Hemsley) Yang was examined with three levels of full light, 50.5% light, and 21.8% light. The results showed that shading led to significant increase in plant height and crown diameter. Light-saturated leaf photosynthetic rate (Amax), maximal carboxylation activity (Vcmax), maximum electron transfer rate (Jmax), stomatal conductance (gs), mesophyll conductance (gm) and chloroplast CO2 concentration (Cc) significantly increased in response to shade. Photorespiratory CO2 release rate (PR) was higher in plants grown under shade conditions than under full light. The relative limitations of gm (lm) was higher than the relative limitations of gs (ls) and the relative limitations of biochemical factors (lb) in leaves of P. bournei grown under full light, whereas lm was lower than ls and lb under shade. Our results suggest that increase of photosynthesis in P. bournei leaves grown under shade is associated with enhanced CO2 diffusion and biochemistry. And we propose that enhancement of the photorespiratory is essential for shade leaves to improve photosynthesis.
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Repková, J., M. Brestič, and K. Olšovská. "Leaf growth under temperature and light control." Plant, Soil and Environment 55, No. 12 (December 28, 2009): 551–57. http://dx.doi.org/10.17221/93/2009-pse.
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Dynamics of crop growth and photosynthesis are two main processes that are of major importance for adaptation of plants to their environment. Two experiments were carried out during 2005 and 2006 with sun and shaded barley plants. The results showed that leaf area increased with leaf position on the main stem up to leaf position 5 for sun and leaf position 6 for shaded plants, and then declined towards flag leaves. Air temperature affected leaf appearance, mainly at the beginning of the growing season. A positive correlation between leaf expansion duration (LED) and accumulated temperature sum was measured for both variants, LED linearly increased with temperature sum. Leaf expansion rate (LER) showed a similar dependence on accumulated air temperatures in both light variants. A strong relation was found between soil temperature and LER for the first four leaves of the main stem of shaded plants in 2006. In shaded environment the higher LER was associated with lower accumulated irradiance sum when light restriction supported an increase of leaf elongation and final leaf length.
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Firdaus, Muhamad Sidiq Irsyadil, and Retno Cahya Mukti. "Utilization of Papaya Leaves (Carica papaya) in Feed on Growth of Catfish (Clarias sp.) in Muara Enim, South Sumatera." IJOTA (Indonesian Journal of Tropical Aquatic) 4, no. 1 (March 1, 2021): 50–56. http://dx.doi.org/10.22219/ijota.v4i1.14453.
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The feed must have a quality that matches the needs of the fish to produce high fish growth. Feed quality can be improved by adding alternative ingredients to feed. One alternative material that can be used is papaya leaves. The purpose of this study was to determine the effect of adding papaya leaves to feed on the growth of catfish (Clarias sp). This research was conducted in Muara Enim, South Sumatra in August 2020. The treatments were P0: control (without adding papaya leaves) and P1: with the addition of papaya leaves. The data observed included absolute growth, specific growth rate, feed efficiency, and survival. Fish maintenance data that obtained in treatment P0, that absolute weight growth of 8.43 g, absolute length growth 5.13 cm, specific growth rate 6.41 %, feed efficiency 95.77 %, and survival 76 %, while in P1 treatment using leaves papaya produced absolute weight growth of 10.57 g, absolute length growth of 5.17 cm, the specific growth rate of 5.84 %, feed efficiency 100.83 %, and survival 60 %. The results obtained indicate that the provision of papaya leaves affects the growth of catfish.
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Hasham, Nisreen Sabbar, Khamael Ali Kareem, Aiymen Ahmed Abdul-Kareem Al-Abassi, and Abdelmonnem Sadalaha Kahle. "Effect of Planting Season and Variety in some Growth Characters of Corn." IOP Conference Series: Earth and Environmental Science 1213, no. 1 (July 1, 2023): 012041. http://dx.doi.org/10.1088/1755-1315/1213/1/012041.
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Abstract Two experiments were conducted during the spring and autumn seasons of 2020 in a field of Sabtiyah village/ Diyala Governorate to study the effect of planting season and variety in some growth characteristics of corn. The seeds of maize varieties (Buhooth -106 and El-Maha) were sowed on 15/3/2020 for the spring season and 15/7/2020 for the autumn season in a randomized complete block design (RCBD) with three replications. The results showed that the spring season was superior in %50 anthesis, %50 silking, leave the area, diameter and chlorophyll, in order 54.33 days,61.67 days, 43.33 dm2, 35.80mm and 56.03 SPAD.So the suitable of the autumn season in plant height and the number of leaves is 186.87 cm and 13.67 leaves. The results showed that El-Maha was superior to booth-106 variety in most characters; it increased in %50 anthesis, %50 silking, leave the area, diameter and chlorophyll to 54.33 days, 61.33 days, 41.09 dm2,32.85 mm and 54.89 SPAD. The interaction between season and variety significantly affected all trait parameters compared with the interaction treatment of control.
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Ya’acob, A., N. Zainol, P. N. Y. Mohd Ridza, and S. H. Mortan. "Pineapple Leaves Juice Characterization for Microbial Growth Inhibition." IOP Conference Series: Materials Science and Engineering 1092, no. 1 (March 1, 2021): 012088. http://dx.doi.org/10.1088/1757-899x/1092/1/012088.
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Golz, J. F. "GRAMINIFOLIA promotes growth and polarity of Antirrhinum leaves." Development 131, no. 15 (June 23, 2004): 3661–70. http://dx.doi.org/10.1242/dev.01221.
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Tominaga, Tohru, and Osamu Watanabe. "Weed Growth Suppression by Cogongrass (Imperata cylindrica) Leaves." Journal of Weed Science and Technology 42, no. 3 (1997): 289–93. http://dx.doi.org/10.3719/weed.42.289.
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Jin, Jung-Kang, Hui-Ling Chen, Chih-Wen Yu, and Chin-Ho Lin. "Establishment of a plastochron index for growth assessment of Phalaenopsis." Canadian Journal of Botany 83, no. 1 (January 1, 2005): 47–53. http://dx.doi.org/10.1139/b04-150.
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A plastochron index was established for four commercial cultivars of Phalaenopsis: Phalaenopsis 'Taisuco Carol' × (Doritaenopsis 'New Cinderella' × P. 'Isaribi') (Taiwan Sugar Corp., code No. S88-41); Phalaenopsis 'Taisuco Swan' × (P. 'Casablanca Dream' × (P. 'Hohoemi' × P. 'Grace Palm')) (code No. S88-89); Doritaenopsis 'I-Hsin Dreamer' × Phalaenopsis 'Taisuco Harmonylip' (code No. S88-104), and Phalaenopsis aphrodite. The plastochron was based on a 20-mm reference leaf length. Semilogarithmical plots of ln-transformed leaf lengths versus time and linear regression analysis were used to evaluate three criteria of the plastochron index. The results showed that leaves 39 of Phalaenopsis aphrodite and leaves 38 of the other cultivars grow exponentially (r2 values between 0.90 and 0.97). Therefore, leaves that fulfilled all three criteria for the plastochron index were leaves 35 of No. S88-41, leaves 34 of No. S88-89, leaves 56 of No. S88-104, and leaves 45 of Phalaenopsis aphrodite. However the plastochron index can not be used for the slow-growing Phalaenopsis, because two successive leaves could not be measured simultaneously during the exponential phase of leaf development. The average relative growth rate of 0.43 mm/week for Phalaenopsis aphrodite was significantly lower than that of the other three cultivars (0.52 mm/week); plastochron duration also showed significant variation among the four cultivars (P value = 0.0269). In addition, the linear relationship (r2 = 0.970.99) of the plastochron index plotted versus time indicates that the intervals between initiation of successive leaves was equal for each of four cultivars. Thus, for these cultivars of Phalaenopsis, leaves that emerge before the reproductive phase can not be fully assessed by the plastochron index.Key words: plastochron index, Phalaenopsis.
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Howitt, Angus J., and Alan R. Hays. "Pear, Insect Growth Regulator Psylla Test, 1985." Insecticide and Acaricide Tests 11, no. 1 (January 1, 1986): 72–73. http://dx.doi.org/10.1093/iat/11.1.72.
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Abstract Treatments consisted of 0.14 acre blocks replicated 4 times. On 26 Jul 3785 ml/acre of MIT AC 1.5 EC was applied to a psylla population which had developed pyrethroid tolerance to reduce the population prior to randomization of this experiment. Materials were applied by airblast sprayer on 2 Aug, 16 Aug and 29 Aug in 78 gal/acre. At each sample period 25 leaves were randomly selected from the center 4 trees of each block, resulting in 100 leaves per replication (400 per treatment). This sample of 25 leaves from each tree was examined for psylla nymphs using a stereo microscope.
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AZEVEDO SCÁRDUA, B. C., and J. C. CANILLE MARTINS. "ON THE GROWTH OF HOLOMORPHIC PROJECTIVE FOLIATIONS." International Journal of Mathematics 13, no. 07 (September 2002): 695–726. http://dx.doi.org/10.1142/s0129167x02001502.
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In the theory of real (non-singular) foliations, the study of the growth of the leaves has proved to be useful in the comprehension of the global dynamics as the existence of compact leaves and exceptional minimal sets. In this paper we are interested in the complex version of some of these basic results. A natural question is the following: What can be said of a codimension one (possibly singular) holomorphic foliation on a compact hermitian manifold M exhibiting subexponential growth for the leaves? One of the first examples comes when we consider the Fubini–Study metric on [Formula: see text] and dimension one foliations. In this case, under some non-degeneracy hypothesis on the singularities, we may classify the foliation as a linear logarithmic foliation. In particular, the limit set of ℱ is a union of singularities and invariant algebraic curves. Applications of this and other results we prove are given to the general problem of uniformization of the leaves of projective foliations.
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Wang, Yin-Tung. "Potassium Nutrition Affects Phalaenopsis Growth and Flowering." HortScience 42, no. 7 (December 2007): 1563–67. http://dx.doi.org/10.21273/hortsci.42.7.1563.
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Bare-root, vegetatively propagated plants (average 15-cm leaf spread) of a white-flowered Phalaenopsis Taisuco Kochdian clone were imported in late May and planted either in a mix consisting of three parts medium-grade douglas fir bark and one part each of perlite and coarse canadian sphagnum peat (by volume) or in chilean sphagnum moss. All plants were given 200 mg·L−1 each of nitrogen and phosphorus, 100 mg·L−1 calcium, and 50 mg·L−1 magnesium at each irrigation with 0, 50, 100, 200, 300, 400, or 500 mg·L−1 potassium (K). After 8 months, K concentration did not alter the number of new leaves on plants in either medium. Plants grown in moss produced four to five leaves, whereas those planted in the bark mix produced only two to three leaves. K concentration did not affect the length of the uppermost mature leaves when grown in the bark mix. However, in moss, plants had increasingly longer and wider top leaves as K concentration increased. The lower leaves on plants in the bark mix lacking or receiving 50 mg·L−1 K showed symptoms of yellowing, irregular purple spots, and necrosis after spiking and flowering, respectively. Yellowing and necrosis started from the leaf tip or margin and progressed basipetally. Symptoms became more severe during flower stem development and flowering. All of the plants lacking K were dead by the end of flowering. Leaf death originated from the lowest leaf and advanced to the upper leaves. K at 50 mg·L−1 greatly reduced and 100 mg·L−1 completely alleviated the symptoms of K deficiency at the time of flowering. However, by the end of flowering, plants receiving 50 or 100 mg·L−1 K had yellowing on one or two lower leaves. Plants grown in moss and lacking K showed limited signs of K deficiency. All plants in the bark mix bloomed, whereas none in sphagnum moss receiving 0 mg·L−1 K produced flowers. For both media, as K concentration increased, flower count and diameter increased. Flower stems on plants in either medium became longer and thicker with increasing K concentration. To obtain top-quality Phalaenopsis with the greatest leaf length, highest flower count, largest flowers, and longest inflorescences, it is recommended that 300 mg·L−1 K be applied under high N and high P conditions regardless of the medium.
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Jurásek, A., J. Leugner, and J. Martincová. "Growth and physiological state of beech seedlings grown in a nursery in different light conditions." Journal of Forest Science 56, No. 10 (September 30, 2010): 442–50. http://dx.doi.org/10.17221/8/2010-jfs.
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Seedlings of European beech of two populations (from the 4<sup>th</sup> and 7<sup>th</sup> forest altitudinal zone) were grown in a shaded and unshaded plastic greenhouse. The objective was to compare seedling growth and the function of assimilatory organs and to determine their reactions after transfer to different light conditions.Seedlings grown in the unshaded plastic greenhouse (the sun variant) were taller and stronger at the end of the first growing season and had the higher weight and volume of shoots and root systems than seedlings grown in the shade. A higher number of leaves, larger total leaf area and higher dry matter of leaves per 1 plant were determined in seedlings grown in the sun. The average area of one leaf was larger in seedlings grown in the shade. The higher photosynthetic electron transport rate (ETR) determined from the light curves of chlorophyll fluorescence in seedlings grown in the sun was apparently connected with the higher photosynthetic rate and more intensive growth of these seedlings. The transfer of seedlings from full sun to shade resulted only in small changes in chlorophyll fluorescence (Fv/Fm, ETR). On the contrary, the transfer of seedlings from the shaded plastic greenhouse to the sun induced photoinhibition leading to a significant reduction in the maximum quantum yield of photochemistry Fv/Fm and in the photosynthetic electron transport rate (ETR).
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Janowska, B. "Effect of growth regulators on flower and leaf yield of the calla lily (Zantedeschia Spreng.)." Horticultural Science 40, No. 2 (May 23, 2013): 78–82. http://dx.doi.org/10.17221/263/2012-hortsci.
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To assess the effect of a mixture of benzyladenine and gibberellic acid on the quality and yield of flowers and leaves of cvs Albomaculata, Black Magic and Mango, their tubers were soaked before planting for 30 min in a water solution with 100–600 ppm BA and 150 ppm GA3. The BA + GA3 mixture application resulted in 2.5–3.5 times as many flowers in comparison to the control plants, which did not affect the quality of flowers and the yield of leaves. The leaves, however, showed higher greenness index and protein quantity.
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Gould, Kevin S., Elizabeth G. Cutter, and J. Peter W. Young. "Does growth rate determine leaf form in Pisum sativum?" Canadian Journal of Botany 67, no. 9 (September 1, 1989): 2590–95. http://dx.doi.org/10.1139/b89-334.
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We have examined the long-standing hypothesis that leaves are morphologically more complex following prolonged proximity to the shoot apical meristem. Growth rates of the petiole and rachis of conventional and mutant pea leaves were compared for successive nodes of insertion in seedling plants. Leaves were longer at higher nodes, though the relative growth rate did not vary. Mature afila leaves were longer than those of conventional and tendril-less genotypes. The afila leaf alone exhibited a transient, highly significant rise in relative growth rate during the plastochron interval P4.5–P5.5. This rise occurred after the stage at which leaves of the different genotypes were anatomically distinguishable (stage P2–P3). Rates of vertical displacement of the leaf primordium from the shoot apical meristem did not differ significantly among genotypes. Our data suggest that the rate of leaf extension is one of the consequences, rather than a cause, of leaf morphology.
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Farni, Yulfita, Retno Suntari, and Sugeng Prijono. "Utilization of Tithonia diversifolia and sugarcane leaves to improve soil properties and plant growth on a sandy soil of Malang, East Java." Journal of Degraded and Mining Lands Management 9, no. 2 (January 1, 2022): 3227–36. http://dx.doi.org/10.15243/jdmlm.2022.092.3227.
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A study on the addition of organic matter of different qualities was carried out to improve plant growth on a degraded sandy soil of Bambang Village, Wajak Malang, East Java. Two potential sources of organic matter in Bambang Village are Tithonia diversifolia and sugarcane leaves. This study aimed at elucidating the changes in some chemical properties of a degraded sandy soil of Malang, East Java, and nutrient uptake and growth of maize plants by applying mixtures of Tithonia diversifolia and sugarcane leaves of different quality. Treatments tested in this study were mixtures of Tithonia diversifolia leaves and sugarcane leaves at various proportions (%w/w), i.e. 100% Tithonia diversifolia leaves (T1), 100% sugarcane leaves (T2), 75% Tithonia diversifolia leaves + 25% sugarcane leaves (T3), 50% Tithonia diversifolia leaves + 50% sugarcane leaves (T4); without organic matters (T6), and control, without organic matter and inorganic fertilizers (T7). The results showed that the application of Tithonia diversifolia and sugarcane leaves affected soil pH, soil exchangeable bases, maize growth, and nutrients uptake. Nutrients taken up by maize plants significantly increased with the addition of Tithonia diversifolia leaves, either alone or in combination with sugarcane leaves. The application of 100% sugarcane leaves did not significantly affect maize growth and nutrient uptake.
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Suberkropp, Keller. "Fungal Growth, Production, and Sporulation during Leaf Decomposition in Two Streams." Applied and Environmental Microbiology 67, no. 11 (November 1, 2001): 5063–68. http://dx.doi.org/10.1128/aem.67.11.5063-5068.2001.
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ABSTRACT I examined the activity of fungi associated with yellow poplar (Liriodendron tulipifera) and white oak (Quercus alba) leaves in two streams that differed in pH and alkalinity (a hardwater stream [pH 8.0] and a softwater stream [pH 6.7]) and contained low concentrations of dissolved nitrogen (<35 μg liter−1) and phosphorus (<3 μg liter−1). The leaves of each species decomposed faster in the hardwater stream (decomposition rates, 0.010 and 0.007 day−1 for yellow poplar and oak, respectively) than in the softwater stream (decomposition rates, 0.005 and 0.004 day−1 for yellow poplar and oak, respectively). However, within each stream, the rates of decomposition of the leaves of the two species were not significantly different. During the decomposition of leaves, the fungal biomasses determined from ergosterol concentrations, the production rates determined from rates of incorporation of [14C]acetate into ergosterol, and the sporulation rates associated with leaves were dynamic, typically increasing to maxima and then declining. The maximum rates of fungal production and sporulation associated with yellow poplar leaves were greater than the corresponding rates associated with white oak leaves in the hardwater stream but not in the softwater stream. The maximum rates of fungal production associated with the leaves of the two species were higher in the hardwater stream (5.8 mg g−1 day−1 on yellow poplar leaves and 3.1 mg g−1 day−1 on oak leaves) than in the softwater stream (1.6 mg g−1day−1 on yellow poplar leaves and 0.9 mg g−1day−1 on oak leaves), suggesting that effects of water chemistry other than the N and P concentrations, such as pH or alkalinity, may be important in regulating fungal activity in streams. In contrast, the amount of fungal biomass (as determined from ergosterol concentrations) on yellow poplar leaves was greater in the softwater stream (12.8% of detrital mass) than in the hardwater stream (9.6% of detrital mass). This appeared to be due to the decreased amount of fungal biomass that was converted to conidia and released from the leaf detritus in the softwater stream.
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León-Burgos, Andrés Felipe, Carlos Ramírez, José Raúl Rendón Sáenz, Luis Carlos Imbachi-Quinchua, Carlos Andrés Unigarro-Muñoz, and Helber Enrique Balaguera-Lopez. "Fitting growth curves of coffee plants in the nursery stage of growth: A functional approach." Agronomía Colombiana 40, no. 3 (November 9, 2022): 344–53. http://dx.doi.org/10.15446/agron.colomb.v40n3.101333.
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The growth patterns of coffee plants are determined by interactions between genetic, physiological, and climate factors. The objective of this study was to evaluate the growth patterns of coffee plants in the nursery under the climatic conditions of Chinchiná, Caldas, Colombia, during the first semester of 2019. Measurements were carried out in the Cenicafé 1 variety during six months. Growth parameters such as leaf area, number of leaves, height, stem diameter, and length of the main root were evaluated every 15 d after transplanting (DAT) in 20 plants and the averages of absolute growth (Ĝ) rate of each growth variable were calculated. For the total leaf area, total number of leaves, and stem height, a sigmoidal-type growth curve was adjusted, while the growth curve was linear for the stem diameter (R2 = 0.97) and main root length (R2 = 0.95). Average values were obtained for 520 cm2 for total leaf area, with an Ĝ of 3.31 cm2 d-1, 11 for total leaves (Ĝ 0.055 leaves d-1), 30.23 cm for height (Ĝ 0.155 cm d-1), 4.87 mm for stem diameter (Ĝ 0.199 mm d-1), and 28.80 cm for main root length (Ĝ 0.087 cm d-1) at 180 DAT. These results suggest that growth curves could be a useful tool for describing the growth patterns of coffee seedlings during the nursery stage of growth.
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Dickson, Richard E., Patricia T. Tomlinson, and J. G. Isebrands. "Allocation of current photosynthate and changes in tissue dry weight within northern red oak seedlings: individual leaf and flush carbon contribution during episodic growth." Canadian Journal of Forest Research 30, no. 8 (August 1, 2000): 1296–307. http://dx.doi.org/10.1139/x00-058.
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Relatively little is known about the changing carbon allocation patterns in species with episodic growth cycles such as northern red oak (Quercus rubra L.). To examine such changing allocation and growth patterns, northern red oak plants were grown from seed in controlled environment chambers through four cycles of growth. 14CO2 was supplied to leaves of the first, second, or third flushes at different Quercus morphological index growth stages within each flush, and the distribution of 14C within the plant was analyzed. Carbon allocation from source leaves of the first and second flush was primarily upward during the subsequent cycle of shoot growth and downward during lag and bud growth stages. All leaves within a flush did not respond the same. Upper leaves allocated most 14C-photosynthate upward during leaf and shoot growth while lower leaves supplied more 14C to lower stem and roots. During the third and fourth flushes, differential allocation from leaves within a flush resulted in essentially equal upward and downward carbon allocation. Growth and allometric relationships reflected these changes in carbon allocation.
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Vieira, Elvis Lima, and Adriana Queiroz de Almeida. "Plant stimulant effect on Brasil-Bahia tobacco growth and production." Pesquisa Agropecuária Tropical 40, no. 4 (December 2010): 468–75. http://dx.doi.org/10.1590/s1983-40632010000400013.
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The purpose of the study was to evaluate the effect of the Stimulate® plant stimulant, applied to leaves by spraying, on tobacco (Nicotiana tabacum L.) growth and production. The Brasil-Bahia tobacco and Stimulate®, at the doses of 0.0 mL L-1 (control - water); 1.0 mL L-1; 3.0 mL L-1; 5.0 mL L-1; and 11.0 mL L-1, in watery solution, were used. On the fifteenth day after sowing (DAS), the treatments were applied. A total of six sprayings were made, once a day, each five days. After forty-three DAS, the number of leaves; stem and root length; stem, roots, and leaves dry matter; and leaf area were evaluated, under nursery conditions. In the field, the plants remained for 64 days (107 DAS) and the number of leaves; number of viable leaves; plant height; stem and leaves dry matter; and leaf area were evaluated. Stimulate®, under nursery conditions, decreased stem, root and leaf dry matter and leaf area for tobacco. Stimulate® was also efficient to increase the number of leaves and stem length, under nursery conditions, for the Brasil-Bahia tobacco. Under field conditions, Stimulate®, applied during the vegetative stage, was not efficient to increase leaf production, however, it increased stem height and dry matter.
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Janowska, B., R. Grabowska, and E. Ratajczak. "Post-harvest longevity of leaves of the sea lavender (Limonium latifolium (Sm.) Kuntze) after application of growth regulators." Horticultural Science 40, No. 4. (November 28, 2013): 172–76. http://dx.doi.org/10.17221/112/2013-hortsci.
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Conditioning is a simple and effective method of post-harvest longevity of both flowers and florists’ greens. Performing this treatment immediately after harvest by the producer increases the quality of floral products expressed as their post-harvest longevity. The purpose of this study was to assess the influence of four growth regulators from the gibberellin and cytokinin groups applied as a 4-h conditioning treatment of leaf blades and to determine any effects on post-harvest longevity of leaves of Limonium latifolium. The leaves were harvested early in the morning from the department of ornamental plants collection. Selected leaves were fully-developed and had no damage or discolouring. Gibberellic acid, benzyladenine, meta- methoxytopolin and its riboside at the concentrations of 25, 50 and 75 mg/dm<sup>3 </sup>were taken up in a solution for 4-h leaf-conditioning of Limonium latifolium at the temperature of 18–20°C. After the conditioning treatment the leaves were placed in distilled water. Leaves placed into distilled water immediately after cutting served as control. Gibberellic acid, benzyladenine and topolins applied as leaf conditioning treatment extended the post-harvest longevity of leaves of Limonium latifolium. Examined growth regulators, with the exception of riboside of meta-methoxytopolin, also had a favourable effect on the index of leaf greenness.
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Ciupak, Anna, Bożena Gładyszewska, Władysław Michałek, and Katarzyna Rubinowska. "Mechanical properties of Polygonatum multiflorum leaves after treatment with growth stimulants." Canadian Journal of Plant Science 99, no. 3 (June 1, 2019): 303–11. http://dx.doi.org/10.1139/cjps-2018-0120.
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The mechanical properties of leaves are important in many aspects of plant science. Because of their delicate structure, leaves are sensitive to different, potentially harmful, environmental factors. The mechanical properties of leaves are important factors affecting leaf quality, longevity, susceptibility to damage, and decomposition. Two growth stimulants were applied to investigate selected mechanical properties of Solomon’s seal Variegatum [Polygonatum multiflorum (L.) All.] leaves grown under field cultivation and in an unheated polytunnel. The mechanical properties of leaves were assessed by measuring Young’s modulus. The agents used in the treatment were Actisil Hydro Plus at a concentration of 0.4% in the first series and Pentakeep V at a concentration of 0.04% in the second series. Foliar treatment with the stimulants was conducted six times at weekly intervals. The control plots were sprayed with distilled water. The research was carried out between 2012 and 2014. In comparison to the test series, the respective effects of Actisil Hydro Plus and Pentakeep V on the change in Young’s modulus was more notable in plant leaves obtained from the tunnel than those from field cultivation. Specifically, growth stimulants had more impact on the stiffness of leaves obtained from plants grown in the tunnel. Generally, plant leaves from field cultivation were stiffer than those from the tunnel.
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Mane, Priyanka Sunil, P. C. Haldavanekar, P. C. Mali, A. V. Mane, Y. R. Parulekar, T. Narute, and M. S. Kadam. "Effect of Plant Growth Regulator and Nutrients on the Vegetative Growth of Potted Bromeliad (Aechmea gamosepala albo marginata)." International Journal of Current Microbiology and Applied Sciences 11, no. 5 (May 10, 2022): 160–69. http://dx.doi.org/10.20546/ijcmas.2022.1105.020.
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The present study was conducted at Department of Floriculture department, College of Horticulture, Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli (MS.) during year 2019-2020. The growth parameters were recorded periodically at 30 days intervals and root parameter was recorded at the end of experiment. From the present investigation it was recorded that the highest shoot length (47.94 cm) was found in Ethrel @ 500 ppm and 19:19:19 @ 1%. The highest length of leaves (43.91 cm), width of leaves (10.36 cm), number of leaves (20.93) was observed in ethrel @ 500 ppm and urea @ 2%. The highest leaf area (705.23 cm2) and leaf area index (0.38) was obtained in @ 500 ppm and urea @ 2%.
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Jassim, Anwar Akram, Rafid Ahmed Abbas Al-Khaldy, and Ahmed Saeed Mohmed. "Effect of Three Growth Stages of Sorghum Residues on Lolium temulentum Weeds Associated with the Barley Crop." IOP Conference Series: Earth and Environmental Science 1060, no. 1 (July 1, 2022): 012112. http://dx.doi.org/10.1088/1755-1315/1060/1/012112.
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Abstract The aim of the study was to investigate phytochemical compounds of aqueous extracts leaves of three growth stages of Sorghum., and the study the effect of those three aqueous extracts on the darnel weed associated with the barley. The GC-MS method was used to screen the phytochemical compounds of three-stage of growth Sorghum which showed diagnosis a number of compounds depending on the retention time such as Daucol, 13-Octadecenal, and Oleic Acid for growth stage 4-6 leaves, and 2,2-Dimethylpropanoic acid, 1-Eicosanol, and Batilol for growth stage 8-10 leaves, and Hexadecanoic acid, Bis(2-ethylhexyl) phthalate and 1-Docosene for growth stage 12-14 leaves. The results showed significant effects of aqueous extracts leaves of Sorghum in the percentage of control dernal weed where recorded 64.133, 85.360, and 86.427% after 30, 60, and 90 days of treatment at growth stage 12-14 leaves of Sorghum compared with 0.00,0.00 and 0.00 in the control treatment.
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Nila, J. Nihal, and R. D. Stevens Jones. "Studies on influence of various stages of mulberry leaf in the growth and cocoonic parameters of silkworm Bombyx mori (L.)." ENTOMON 48, no. 2 (June 30, 2023): 219–28. http://dx.doi.org/10.33307/entomon.v48i2.891.
Full textAbstract:
The objective of this work was to determine the effects of different stages of mulberry leaves on growth performance of treated larvae of Bombyx mori L. (Lepidoptera, Bombycidae) and characters of the resulted cocoons were evaluated. Results showed that the food consumption rate and assimilation rate were greatest for larvae fed on tender and over matured mulberry leaves as compared to larvae fed on mature leaves. Assimilation and conversion efficiencies were very high in the larvae grown on matured mulberry leaves (0.189 and 1.99% respectively). Moreover, the larvae fed on matured mulberry leaves showed higher growth rate, cocoon weight and shell ratio. Among the three different growth stages of leaves, the matured leaves were found to be the best food for final instar larvae of Bombyx mori L. which promotes maximum larval growth and it gains to quality cocoon and raw silk production.
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Soros, Connie L., and Nancy G. Dengler. "Leaf morphogenesis and growth in Cyperus eragrostis (Cyperaoeae)." Canadian Journal of Botany 74, no. 11 (November 1, 1996): 1753–65. http://dx.doi.org/10.1139/b96-212.
Full textAbstract:
We identified the zones of leaf extension, cell division, cell elongation, and cell differentiation in developing leaves of a sedge species, Cyperus eragrostis Lam. (Cyperaceae). The zone of leaf extension was located by measuring the separation between pinhole markers and by observing the staining pattern of Calcofluor White after pulse-labelling growing leaves. These observations were supported by determining growth rates of control and punctured leaves and by scanning electron and light microscopy of developing leaves. The location of the zone of cell division was assessed by enumerating mitotic figures, and the zone of cell elongation was established by measuring lengths of epidermal cells in cleared leaves. These studies indicated that the zone of leaf elongation is within the basal 10–15 mm of a leaf and that cell divisions are restricted to the basal 0.2–1 mm. Radial enlargement of internal tissues begins in the basal half of the elongation zone and cells are fully differentiated within a short distance above it. Expanding leaves can be divided into three zones: zone 1, a basal meristematic zone where cell division and some cell elongation occur; zone 2, a zone above the base where cells are elongating but cell division has ceased; and zone 3, a zone where elongation is complete and cells have reached their final length. This pattern of leaf development is similar to, but more condensed than, feat found in the related monocotyledonous family, the Poaceae. Keywords: Cyperus eragrostis, leaf development, leaf extension zone, Cyperaceae, cell enlargement.