Relevant bibliographies by topics / Seedling seeds

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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Academic literature on the topic 'Seedling seeds'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Seedling seeds"

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Frisby, James W., and Schuyler D. Seeley. "CHILLING OF PEACH SEEDS, SEEDLINGS AND CUTTINGS." HortScience 25, no. 9 (1990): 1088f—1088. http://dx.doi.org/10.21273/hortsci.25.9.1088f.

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Correlations were made between the responses of seeds, physiologically dwarfed seedlings and dormant cuttings to similar chilling treatments. Seed germination correlated highly with growth of physiologically dwarfed seedlings and shoot growth of dormant cuttings. Emergence and seedling growth correlated poorly with germination, growth of physiologically dwarfed seedlings and shoot growth of dormant cuttings. Thus, germination was a better seed predictor of the mature peach chilling response than emergence or seedling growth. Growth of dwarfed seedlings correlated highly with shoot growth of dormant cuttings. The anomalous leaf condition of peach seedlings may have confounded seedling growth after seed chilling, but was not a problem when the chilling treatment was provided to physiologically dwarfed seedlings. The dormancy release mechanisms that promoted seed germination, growth of physiologically dwarfed seedlings and growth of dormant cuttings were similar.
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Bodnaryk, R. P., and R. J. Lamb. "Influence of seed size in canola, Brassica napus L. and mustard, Sinapis alba L., on seedling resistance against flea beetles, Phyllotreta cruciferae (Goeze)." Canadian Journal of Plant Science 71, no. 2 (1991): 397–404. http://dx.doi.org/10.4141/cjps91-055.

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Seedlings of Brassica napus L. 'Westar' or Sinapis alba L. 'Ochre' grown from seeds of various size were offered to flea beetles, Phyllotreta cruciferae (Goeze) in feeding tests for damage assessment. The proportion of cotyledon area damaged in both species was highest for seedlings grown from small seeds in choice and no-choice feeding tests. The proportion of seedlings killed by flea beetle feeding was also highest in seedlings from small seeds, an effect that was especially pronounced at high beetle densities (10/seedling) where 100% of seedlings from small seeds of B. napus were killed compared to 28.3% of seedlings from big seeds. For S. alba, at 20 beetles/seedling, 45.4% of seedlings from small seeds were killed compared to only 9.1% of seedlings from big seeds. Seedlings grown from big seeds of S. alba tolerated low levels of damage caused by flea beetle feeding or by scissors. No evidence for tolerance was obtained for seedlings from small seeds of S. alba or for seedlings from big or small seeds of B. napus. "Big seeds" appears to be a desirable trait that enhances crucifer seedling resistance to flea beetle attack and results in increased seedling survival. Key words: Brassica napus 'Westar', Sinapis alba 'Ochre', Phyllotreta cruciferae, flea beetle, seed size, resistance
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Couvillon, Gary A. "Cercis canadensis L. Seed Size Influences Germination Rate, Seedling Dry Matter, and Seedling Leaf Area." HortScience 37, no. 1 (2002): 206–7. http://dx.doi.org/10.21273/hortsci.37.1.206.

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Several studies with annual crops have shown that large seeds improve percent germination, seedling growth, and uniformity, yield, seedling vigor, and stress tolerance. Little information is available on the influence of seed size on the resulting seedlings of woody plant species. Cercis canadensis L. seeds were divided into large and small seed size fractions and the seeds scarified, stratified, and planted. A larger percentage of large seeds germinated than did small seeds. Seedlings from large seeds had a greater peak and germination value than small seeds, indicating greater vigor and a more rapid germination rate thus more uniform seedlings. Seedlings from large seeds, as indicated by fresh and dry weights, were larger and contained a greater leaf area than those produced by small seed.
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Reader, R. J., and J. Buck. "Control of seedling density on disturbed ground: role of seedling establishment for some midsuccessional, old-field species." Canadian Journal of Botany 69, no. 4 (1991): 773–77. http://dx.doi.org/10.1139/b91-100.

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In midsuccessional old fields, seedlings are often concentrated in patches of disturbed ground, such as earth mounds created by burrowing mammals. An experiment was conducted to determine whether interspecific variation in seedling density on mounds reflected interspecific variation in potential seedling establishment (i.e., the number of seedlings established per 1000 seeds sown). Seeds of 13 old-field forbs were sown on experimentally created mounds in an abandoned pasture. Their potential seedling establishment ranged from 0 to 156 seedlings per 1000 seeds sown, and seedling establishment was directly related to seed mass. The number of seedlings becoming established naturally on mounds ranged from 0.1 to 41 seedlings per mound for the 13 species. Natural seedling establishment and potential seedling establishment were not directly related. Instead, natural seedling establishment on mounds was correlated with species' frequency of occurrence off mounds. This suggests that seed availability may be more important than seedling establishment in controlling seedling density on mounds. However, if seed availability is unlimited or equal among species, then seedling establishment could control seedling density on disturbed ground. Key words: disturbance, seedling density, old field.
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Erniwati, Erniwati. "PENGARUH UKURAN BIJI TERHADAP KEMAMPUAN TANAMAN TUMBUH KEMBALI SETELAH RUSAK AKIBAT HERBIVORI." Jurnal Ilmu-Ilmu Pertanian Indonesia 9, no. 2 (2017): 156–64. http://dx.doi.org/10.31186/jipi.9.2.156-164.

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The objective of the study is to investigate the effect of seed size in the resprouting ability of seedling after being damaged and whether it correlates with the reserve effect. We grew the seedlings of two species of oak, namely Quercus robur and Quercus petraea from different seed size, in a greenhouse. The seedlings were harvested at different stages; after emergence, at the first shoot fully developed, and after the seedling had re- grown after the initial shoot was clipped. The result showed that: firstly, at the time of full seedling development, large seeds translocated less percentage of reserve from the seed to seedling. After clipping, the seedlings from large seeds translocated additional resources to the seedling. Secondly, although the larger seed has the larger biomass to re-sprout, the total mass invested in re-sprouting proportional with seedling size. We concluded that the seedlings of larger seeds re-sprout better than those of the smaller seeds. However, we did not find the improved performances correlating with the Reserve Effect Theory
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Zhang, Jianhua, and M. A. Maun. "Effects of partial removal of seed reserves on some aspects of seedling ecology of seven dune species." Canadian Journal of Botany 69, no. 7 (1991): 1457–62. http://dx.doi.org/10.1139/b91-188.

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Greenhouse studies were conducted to determine the effects of partial removal of endosperm or cotyledons from seeds of seven dune species on seed germination, seedling emergence, seedling size, and dry matter allocation. Different proportions (0, 30, and 60%) were surgically removed from seeds of Agropyron psammophilum, Calamovilfa longifolia, Elymus canadensis, Leymus arenarius, Panicum virgatum, Lupinus perennis, and Strophostyles helvola. Partial removal of seed reserves caused a significant reduction in seedling variables 1 or 2 weeks after planting in sand. For example, seedling height, leaf area, dry weight of leaves, stem, and roots were significantly lower than control. The data suggest that the principal determinant of seedling size at an early stage was the amount of energy reserves in the endosperm or cotyledons of seeds. In addition to reduction in food reserves, partial removal of seed reserves caused some physiological damage to seedlings. In grass species, seedlings from surgically treated seeds devoted more dry matter to the roots and less to the leaves and stem than control seedlings. In dicot species, however, plants from treated seeds devoted more dry matter to the leaves and less to the roots. Key words: seed injury, seed germination, seedling size, energy allocation, dune plants.
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Elliott, R. H., L. W. Mann, and O. O. Olfert. "Effects of seed size and seed weight on seedling establishment, seedling vigour and tolerance of summer turnip rape (Brassica rapa) to flea beetles, Phyllotreta spp." Canadian Journal of Plant Science 87, no. 2 (2007): 385–93. http://dx.doi.org/10.4141/p06-166.

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A 3-yr study was conducted on three synthetic Brassica rapa L. cultivars to determine the effects of seed size and seed weight on seedling establishment, seedling growth and susceptibility to feeding damage by flea beetles, Phyllotreta spp. (Coleoptera: Chrysomelidae). Seed lots of AC Boreal, Fairview and Hysyn 110 were sieved to obtain small, medium and large seeds (1.4–1.6, 1.6–1.8 and 1.8–2.0 mm, respectively). In the laboratory, seedlings grown from large seeds had the largest cotyledons, highest shoot dry weight and highest biomass. Shoot weights increased as seed size increased. Sized seeds of the three cultivars were grown in the field without insecticides in 1998–2000. Seedlings of small seeds had the highest flea beetle damage and poorest seedling establishment. Shoot dry weight and biomass 14–35 d after planting increased as seed size and seed weight increased. Compared with small seeds, large seeds improved shoot dry weight, biomass and seed yield by 13–43, 25–57 and 12%, respectively. Results indicated that seedlings of medium and large seeds are more vigorous and tolerant to flea beetle damage than seedlings of small seeds. Tolerance was due to a higher initial seedling weight rather than higher relative growth rate. Shoot dry weights, biomass and yield of the three cultivars were more strongly correlated with 1000-seed weight than with seed diameter. Key words: Canola, flea beetles, seed size, seedling vigour, tolerance, seed weight
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M.G. Nayak and G.S. Mohana, Babli Mog, J. D. Adiga. "Germination and seedling establishment in cashew (Anacardium occidentale L.): An interaction between seed size, relative growth rate and seedling biomass." Journal of Plantation Crops 45, no. 2 (2017): 110. http://dx.doi.org/10.19071/jpc.2017.v45.i2.3305.

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<p>Seeds of cashew were used to determine the effect of seed mass (5.2 to 7.8 g) on germination, seedling emergence and growth<br />under nursery conditions. Germination percentage and germination time showed significant correlation with seed mass. Large<br />sized seeds had higher germination percentage (81.6%) and produced more vigorous seedlings. Per cent seedling emergence was<br />related to seed mass with large sized seeds exhibited faster emergence. Seed mass significantly affected seedling survival and<br />survival rate was high in seedlings arising from large sized seeds (62.9%). Seedling vigor expressed in terms of shoot and root<br />length, leaf number, leaf area and total dry matter was significantly affected by seed mass. Seedlings that emerged from large sized<br />seeds showed better growth and produced heavier seedlings as compared to medium sized seeds. RGR showed significant variation<br />(0.152 to 0.240 g g-1day-1) among two seed size classes positively correlated with seed mass, leaf area (LA), unit leaf rate per unit<br />leaf area (ULRM), root to shoot ratio (R/S) and root mass ratio (RMR) and negatively with stem mass ratio (SMR). The study<br />concluded that the seed mass and RGR have influence on seedling growth and success of seedling establishment in cashew.</p>
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Magnitskiy, Stanislav V., Claudio C. Pasian, Mark A. Bennett, and James D. Metzger. "Controlling Height and Seedling Emergence of French Marigold and Celosia Plugs with Plant Growth Regulators." Journal of Environmental Horticulture 24, no. 3 (2006): 165–68. http://dx.doi.org/10.24266/0738-2898-24.3.165.

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Abstract Soaking French marigold seeds in growth regulator solutions produced larger reductions in seedling height than foliar sprays. Seeds soaked in 1 to 5 ppm uniconazole solutions for 0.15, 5, or 45 min resulted in plants that were up to 23% shorter than controls at 30 DAS, whereas foliar applications of 10 to 20 ppm uniconazole solutions resulted in plants 18% shorter than controls at 14 DAS. French marigold seedlings from seeds soaked in 60 pm ancymidol for 5 or 45 min were 5 or 6%, respectively, shorter than controls. Foliar spray applications of 25 or 100 ppm ancymidol to French marigold seedlings resulted in plants 8% shorter than controls. Chlormequat solutions applied either as a seed soak (1000–5000 ppm) or foliar spray (500–3000 ppm) did not reduce French marigold seedling height. Emergence of French marigold seedlings from seeds soaked in uniconazole, ancymidol, or chlormequat solutions was not different from that of control seeds. No effect on seedling height or emergence was found when soaking celosia seeds in uniconazole, ancymidol, or chlormequat solutions. Spraying celosia seedlings with uniconazole, ancymidol, or chlormequat solutions did not reduce seedling height.
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Zhang, Haiyan. "Seed Germination and Early Seedling Growth of Cynanchum bungei Decne (Asclepiadaceae) in Response to Photoperiod, Temperature, and Seed Size." HortScience 47, no. 9 (2012): 1338–41. http://dx.doi.org/10.21273/hortsci.47.9.1338.

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Cynanchum bungei Decne is a rare, endemic, and important medicinal plant species in China. Seed germination and early seedling growth of large seeds (greater than 7 mm) and small seeds (smaller than 7 mm) were investigated at three temperatures (15, 20, and 25 °C) in both continuous light and alternating light/dark photoperiods to determine seed propagation requirements. Photoperiod significantly affected seed germination and early seedling growth. Germination and seedling growth at a 12:12-h photoperiod performed better than in continuous light. Temperature had a significant effect on germination index (GI), vigor index (VI), germination velocity (GV), mean germination time (MGT), shoot biomass (SB), root biomass (RB), and taproot length (TL), but no significant effect on final germination percentage (FGP). A temperature of 20 °C was the optimum temperature for seed germination and early seedling growth. Average growth height (AGH) and relative growth rate (RGR) of shoots at 15 °C were greater than that at 20 °C. Large seeds had better germination and seedling performance than small seeds. However, small-seeded seedlings had greater biomass allocated to roots (BAR) and root-to-seedling ratio (RSR) than seedlings from large seeds. Small seeds of C. bungei could be more competent in unfavorable soil and light conditions than large seeds.
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Dissertations / Theses on the topic "Seedling seeds"

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Welling, P. (Pirjo). "Regeneration by seeds and vegetation structure in alpine plant communities, subarctic Finland." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:951426861X.

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Abstract The aims were to examine the importance of regeneration by seeds, the influence of plant traits and disturbances, and the role of seed-seedling conflicts in regeneration and in the determination of vegetation structure. The study was carried out at in a subarctic alpine area (Kilpisjärvi 69°01'N 20°50E', Finland). Seed bank and seedling densities were high in many plant communities (ranges 99 -1109 viable seeds/m2 and 0.2-227 seedlings/m2, respectively). Effective seedling recruitment is reflected in vegetation as a high proportion of plants with poor or no vegetative reproduction ability. This development may take place in meadows and snowbeds where herbs (e.g. Gnaphalium supinum, Sibbaldia procumbens, Veronica alpina and Viola biflora) are abundant. On the other hand, the low proportion of these plants in heath vegetation reflects ineffective seedling recruitment. Floristic similarities between the consecutive phases in the regeneration pathway may be low despite effective seedling recruitment. Clonality, large and small seed sizes and appendaged diaspores limit the movement of species from phase to phase. Generally, disturbances facilitate effective regeneration by seeds. Grazing promotes species with large seed banks and is therefore one reason for high seed bank densities. Freezing and melting processes negate a negative influence of altitude on seed bank densities in the phase of seedlings. However, if disturbances are severe and continuous and the soil is compact, unstable or dry, disturbances are not beneficial. The same is true if there is a shift in the species composition of seedlings from gaps to closed vegetation. This phenomenon occurred in a rich meadow. Seed-seedling conflicts limit regeneration by seeds in low-herb snowbeds and Ranunculus glacialis-Gymnomitrion snowbeds. Vegetative reproduction and infrequent pulses of seedling recruitment negate an influence of short-term seedling recruitment on the spatial structure of vegetation. Extreme conditions, such as low temperatures, instability of the soil and late snowmelt modify the influence of factors that are important in more moderate conditions. To conclude, all transitions limit regeneration by seeds. However, favourable conditions (e.g. moist conditions in a meadow) partly eliminate the obstacles against seedling emergence. Regeneration by seeds therefore has a major impact on the dynamics and structure of vegetation. In heath vegetation, where bare soils are dry and the moss cover is thick, large seed banks and seed rains do not guarantee effective seedling recruitment. The regeneration process is reduced in the early phases, and plants that reproduce primarily by seeds have a minor role in vegetation. The accumulation of seed banks is effective in these circumstances.
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Magnitskiy, Stanislav V. "Controlling seedling height by treating seeds with plant growth regulators." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1101741472.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xix, 157 p.; also includes graphics. Includes bibliographical references (p. 147-157).
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Kamboozia, Jafar. "Seedling vigour in winter grain legumes." Title page, table of contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phk152.pdf.

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Cordazzo, Cesar Vieira. "Comparative population studies of four dominant plants of southern Brazilian coastal dunes." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241475.

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De, Villiers Rykie (Rykie Jacoba). "The influence of chemical seed treatment on germination, seedling survival and yield of canola." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50163.

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Thesis (MScAgric)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: The influence of chemical seed treatments on the germination, seedling survival and yield of canola (cv. Varola 44) was investigated in a series of incubation studies, glasshouse experiments, as well as field trials in the canola producing areas in the Western Cape Province. Incubation experiments were conducted to compare germination and seedling growth of untreated (control) seed with that of seed treated at different application rates (0.5, 1.0 and 2.0 times the recommended) of Cruiser® and SA-combination (which consists of Thiulin® at 0.5g a.i.; Apron® at 0.0815 g a.i.; Gaucho® at 0.6125 g a.i. and Rovral® at 0.9975 g a.i.). The results indicated that seed treatment (all rates of SA-combination and highest rate of Cruiser) delayed germination and seedling growth, especially if the seed was subjected to the Accelerated Ageing Test. Glasshouse studies with pasteurised soil at different water contents, seed sources (storage periods) and planting depths confirmed the phytotoxic effects of the chemical seed treatments in the absence of soil borne pathogens. From the results it became clear that extreme water conditions (very wet or dry) increased the suppressing effect on germination and seedling growth, but that no phytotoxic reactions occurred in moist (favourable soil water conditions) soil, regardless of application rate of the chemicals used, planting depth and seed source. In a second glasshouse experiment conducted in moist soil (kept at 50% of field water capacity to prevent any toxic effects) from seven different localities that were naturally infested with pathogens, both chemicals proved to be effective where soil borne pathogens (Rhizocfonia so/ani and Pythium spp.) occurred. No clear trend could however be found due to either chemical or application rates used. Finally, field trials were conducted to study the effect of chemical seed treatments on the plant populations and yield of canola planted in different row widths (17 and 34 cm) and seeding rates (3, 5 and 7 kq.ha'). Results showed that treated seeds produced more plants.rn" and yielded more than untreated seeds at Roodebloem Experimental Farm, while the highest seeding rate produced significantly more plants.rn" (Roodebloem and Langgewens Experimental Farms), but not significantly higher yields than the lowest seeding rate at the same locality. Although row width did not have an effect on plant population, yield (Roodebloem 2003) was significantly less at the wider (34 cm) rows. As in earlier experiments, no consistent differences between the two chemicals used were found. These results clearly illustrated both the negative (in the absence of pathogens) and positive (where soil borne pathogens do occur) effects that chemical seed treatments may have on the germination, seedling growth and even yield of canola under local environmental and soil conditions. Because no significant differences were found between the chemicals used, both chemicals should be regarded as efficient. More research, especially under field conditions and with more cultivars, is needed before the registration of a chemical for seed treatment could be considered.<br>AFRIKAANSE OPSOMMING: Die invloed van chemiese saadbehandeling op die ontkieming, saailing oorlewing en opbrengs van canola (cv. Varola 44) is ondersoek in 'n reeks inkubasie studies, glashuis eksperimente en veldproewe in die canolaproduserende gebiede in die Wes Kaap Provinsie. Inkubasie eksperimente is uitgevoer om die ontkieming en saailing groei van onbehandelde (kontrole) saad te vergelyk met dié van saad wat behandel is teen verskillende dosisse (0.5, 1.0 en 2.0 keer die aanbevole) van Cruiser® en SA-kombinasie (wat bestaan uit Thiulin® teen 0.5g a.i.; Apron® teen 0.0815 g a.i.; Gaucho® teen 0.6125 g a.i. en Rovral® teen 0.9975 g a.i.). Die resultate het aangedui dat saadbehandeling (vir alle dosisse van SAkombinasie en die hoogste dosis van Cruiser) ontkieming en saailing groei vertraag, veral wanneer die saad onderwerp was aan die Versnelde Verouderings Toets. Glashuis studies met gepasteuriseerde grond by verskillende waterinhoude, saad bronne (stoor periodes) en plantdieptes, het die fitotoksiese effekte van die chemiese saadbehandelings bevestig in die afwesigheid van grondgedraagde patogene. Vanuit die resultate het dit duidelik geword dat ekstreme water toestande (baie nat of droog) die onderdrukkende effek op ontkieming en saailinggroei verhoog het, maar dat geen fitotoksiese reaksies plaasgevind het in klam (gunstige grondwater toestande) grond nie, ongeag die dosisse of chemikalieë gebruik, plantdiepte en saad bron. In 'n tweede glashuis eksperiment uitgevoer in klam grond (gehou by 50% van veldwaterkapasiteit om toksiese effekte te voorkom) van sewe lokaliteite wat natuurlik besmet was met patogene, was beide chemikalië effektief waar grondgedraagde patogene (Rhizoctonia so/ani en Pythium spp.) voorgekom het. Geen duidelike tendens is egter waargeneem vir enige van die chemikalieë of dosisse nie. Laastens is veldproewe uitgevoer om die effek van chemiese saadbehandelings op plant populasies en opbrengs te bepaal van canola geplant in verskillende rywydtes (17 en 34 cm) en saaidigthede (3, 5 en 7 kg.ha-1). Resultate het aangedui dat behandelde saad meer plante.rn" produseer en 'n groter opbrengs lewer as onbehandelde saad by Roodebloem Eksperimentele Plaas, terwyl die hoogste saaidigtheid betekenisvol meer plante.m" (Roodebloem en Langgewens Eksperimentele Plase), maar nie betekenisvol hoër opbrengste gelewer het as die laagste saaidigtheid by dieselfde lokaliteit nie. AI het rywydte nie 'n effek op plant populasie gehad nie, was opbrengs (Roodebloem 2003) betekenisvol minder by die wyer (34 cm) rye. Soos in vroeëre eksperimente is geen konsekwente verskille tussen die twee chemikalieë gevind nie. Hierdie resultate illustreer duidelik beide negatiewe (in die afwesigheid van grondgedraagde patogene) en positiewe (in die aanwesigheid van grondgedraagde patogene) effekte wat chemiese saadbehandelings op ontkieming, saailing groei en selfs opbrengs van canola onder plaaslike omgewings en grondtoestande kan hê. Omdat geen betekenisvolle verskille tussen die chemikalieë gevind is nie, moet beide chemikalieë as doeltreffend aanvaar word. Meer navorsing, veralonder veldtoestande en met meer kultivars, is egter nodig voordat die registrasie van 'n chemiese middel vir saadbehandeling oorweeg kan word.
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Mogollones, Barrera Sol C. "Seed dispersal, seedling emergence and bird community structure in a human-modified landscape mosaic in Sri Lanka." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=202126.

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Weatherall-Thomas, Clayton Richard. "Seed dynamics and seedling survival in mainland thicket of the Eastern Cape." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/1048.

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Subtropical Thicket is the dominant vegetation biome in the Eastern Cape. Little regeneration through seedlings has been observed in Thicket. This is of serious concern, as Thicket has been degraded over large areas of its distribution. An understanding of the seed dynamics is necessary for any restoration project. A number of possible causes for the lack of seedlings were therefore investigated. Study sites were best classified according to the biogeographical regions of the Subtropical Thicket Ecosystem Planning (STEP) project. The seed bank of Thicket is dissimilar to the aboveground vegetation, as it lacks woody species and is dominated by herbs and grasses, making little contribution to the regeneration of Thicket species. An increase in canopy cover resulted in lower soil and air temperatures, as well as light, and an increase in litter depth. Seedling abundance and species richness increases with mean annual rainfall, with woody seedlings being dominant in the higher rainfall areas, and succulent species in the lower rainfall regions. Anemochorous species dominated the germinable seed bank, and zoochorous species were more prevalent underneath the canopy, compared to open areas, an indication of active seed dispersal. No germination was recorded in many Thicket species, and dormancy mechanisms were lacking in many of the species that did germinate. Immersion in hot water increased germination in the hard seeds of Acacia karroo, whereas shade enhanced germination in small seeded Burchellia bubalina. The response of seedlings of four Thicket species with varying distribution to shade and drought was studied. Ptaeroxylon obliquum and Aloe africana are drought tolerant species, whereas Burchellia bubalina and Rhus dentata were intolerant to low soil moisture. All four species were able to grow in deep shade, although Rhus dentata would be classified as a shade avoider, unlike the other three species that are shade tolerant. This results in the four species having different regeneration niches. It was concluded that dispersal and the lack of “safe sites” for seedlings were the main limitations to seedling establishment in Mainland Thicket.
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Van, Etten Erica. "Seedling recruitment of large-seeded tropical trees planted as seeds in the Ecuadorian Amazon." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025046.

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Socolowski, Fabio. "Ecologia germinativa, relações alométricas e o efeito da massa das sementes de Tecoma stans L. Juss. ex Kunth (Bignoniaceae) sobre a emergência e desenvolvimento das plântulas /." Rio Claro : [s.n.], 2007. http://hdl.handle.net/11449/100667.

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Orientador: Massanori Takaki<br>Banca: João Domingos Rodrigues<br>Banca: Silvio Moure Cícero<br>Banca: José Marcos Barbosa<br>Banca: Márcia Balistiero Figliolia<br>Resumo: Este estudo teve como objetivo avaliar a relação entre a massa e características morfométricas de frutos e sementes de Tecoma stans, bem como relacionar a massa das sementes a suas características morfológicas, utilizando paquímetro e imagens de raios X, e fisiológicas, através da germinação, emergência e desenvolvimento inicial de suas plântulas, sob duas condições de luminosidade . a pleno sol e sombra. Além disso, também foram avaliados os efeitos de diferentes condições de temperatura e luz constantes, em laboratório, e em ambiente natural no sol e na sombra na germinação e emergência das plântulas. A massa dos frutos apresentou relações lineares significativas e positivas com suas características morfológicas e de produção de sementes. As relações entre a massa das sementes e suas características morfológicas foram positivas e significativas, porém na forma de uma função potência, sendo esta relação mais evidente com a largura do embrião. A massa das sementes também esteve relacionada a determinadas anomalias do desenvolvimento embrionário, observadas nas imagens de raios X. A germinação, a emergência e o desenvolvimento inicial das plântulas foram significativamente afetados pela massa das sementes, porém somente durante os três primeiros meses de desenvolvimento no ambiente de sol. A temperatura apresentou efeito na germinação e suas sementes germinaram tanto na luz quanto no escuro, contudo a emergência e sobrevivência das plântulas no ambiente de sol foi superior em relação ao observado na sombra.<br>Abstract: This study had the objective to evaluate the relationship between the mass and the morphometric characteristics of Tecoma stans fruits and seeds, as well as to relate the seed mass with its morphometric characteristics, utilizing caliper and X-ray images, and physiological characteristics, thought germination, emergency and seedlings initial development, under two conditions of light - at the sun and shade. More than, also were evaluated the effects of different conditions of constant temperature and light, under laboratory, and natural environment under sun and shade in the germination and emergency of the seedlings. The fruit mass presented positive, significative linear relationship with his morphological characteristics and with its seed production characteristics. The relationship between seed mass and its morphological characteristics were positive and significative, nevertheless with the model (shape) of power function, being the relationship more clear with the embryo width. The seed mass also was related to determinate anomalies of the embryo development that could be observed in the X-ray images. The germination, the seedling emergence and the initial seedling development were significative affected by seed mass, but only in the firth three months of development at the sun environment. The temperature affected Tecoma stans seed germination in both light and darkness environment, however the seedlings emergency and survival was greater at the sun environment than shade.<br>Doutor
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Sekharan, Soja. "Aged soybean (Glycine max [L.] Merrill) seeds – their physiology and vigor assessment." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1135809134.

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Books on the topic "Seedling seeds"

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Sanah, Mat Asri Ngah, Zakaria Ibrahim 1948-, and Institut Penyelidikan Perhutanan Malaysia, eds. Germination and seedling records. Forest Research Institute Malaysia, 1991.

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Pierre-Michel, Forget, ed. Seed fate : predation, dispersal, and seedling establishment / edited by Pierre-Michel Forget ... [et al.]. CABI Pub., 2005.

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Tauer, Charles G. Seed source influences juniper seedling survival under severe drought stress. USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1987.

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Williams, Dave. The Tallgrass Prairie Center guide to seed and seedling identification in the Upper Midwest. Published for the Tallgrass Prairie Center by the University of Iowa Press, 2010.

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James, Robert L. Fungal colonization of residual conifer seedling roots in soil: USDA Forest Service Lucky Peak Nursery, Boise, Idaho. U.S. Dept. of Agriculture, Forest Service, Northern Region, 1999.

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Dwight, Kuhn, ed. Seeds and seedlings. Blackbirch Press, 1997.

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James, Robert L. An evaluation of the effects of dazomet on soil-borne diseases and conifer seedling production: USDA Forest Service Lucky Peak Nursery, Boise, Idaho. U.S. Dept. of Agriculture, Forest Service, Northern Region, 1999.

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J, Jennings Terry. Seeds and seedlings: Photocopiable activities. Scholastic, 1994.

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Hasanuzzaman, Mirza, and Vasileios Fotopoulos, eds. Priming and Pretreatment of Seeds and Seedlings. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8625-1.

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Ng, F. S. P. Manual of forest fruits, seeds, and seedlings. Forest Research Institute Malaysia, 1991.

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Book chapters on the topic "Seedling seeds"

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Bewley, J. Derek, and Michael Black. "Cellular Events during Germination and Seedling Growth." In Seeds. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1002-8_4.

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Bewley, J. Derek, and Michael Black. "Cellular Events during Germination and Seedling Growth." In Seeds. Springer US, 1985. http://dx.doi.org/10.1007/978-1-4615-1747-4_4.

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Rehman, Abdul, Komal Mazhar, Muhammad Ijaz, Qasim Ali, and Shakeel Ahmad. "Seedling Pretreatment: Methods and Protocols." In Priming and Pretreatment of Seeds and Seedlings. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8625-1_5.

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Haider, Idrees, Muhammad Akmal, Muhammad Taimoor Shakeel, et al. "Improving Antioxidant Defense in Plants Through Seed Priming and Seedling Pretreatment." In Priming and Pretreatment of Seeds and Seedlings. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8625-1_29.

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Sahoo, Smita, Pankaj Borgohain, Bedabrata Saha, Debojyoti Moulick, Bhaben Tanti, and Sanjib Kumar Panda. "Seed Priming and Seedling Pre-treatment Induced Tolerance to Drought and Salt Stress: Recent Advances." In Priming and Pretreatment of Seeds and Seedlings. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8625-1_12.

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Moulick, Debojyoti, Subhas Chandra Santra, Dibakar Ghosh, and Sanjib Kumar Panda. "An Assessment of Efficiency of Zinc Priming in Rice (cv. MTU-7029) During Germination and Early Seedling Growth." In Priming and Pretreatment of Seeds and Seedlings. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8625-1_24.

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Turley, Rickie B., and Kent D. Chapman. "Ontogeny of Cotton Seeds: Gametogenesis, Embryogenesis, Germination, and Seedling Growth." In Physiology of Cotton. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3195-2_29.

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Fenner, Michael. "Seedling establishment." In Seed Ecology. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4844-0_7.

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Thompson, Gregory A., and Chingying Li. "Altered Fatty Acid Composition of Membrane Lipids in Seeds and Seedling Tissues of High-Saturate Canolas." In Physiology, Biochemistry and Molecular Biology of Plant Lipids. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-017-2662-7_99.

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Quilloy, Fergie Ann, Benedick Labaco, Carlos Casal, and Shalabh Dixit. "Crop Establishment in Direct-Seeded Rice: Traits, Physiology, and Genetics." In Rice Improvement. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66530-2_6.

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AbstractThe changing climate and water availability strongly affect the current state of agricultural production. While the global temperature rises, the occurrence of extreme climatic conditions becomes erratic. This current scenario has driven the development of rice varieties and cultivation practices that require less water and favor mechanization. Although puddled transplanted rice has been more widely used in the past, direct seeding has been gaining popularity in recent years, especially due to its water- and labor-saving features. This technique allows full crop establishment from seeds that were directly sown in the field, thus avoiding puddling, transplanting, and maintaining standing water. Consequently, it offers promising positive environmental effects including decreasing the release of greenhouse gases and increasing water-use efficiency. Historically, rice varieties bred for transplanting are also used in direct seeding, which limits the maximum yield potential of field trials. The success of direct seeding relies strongly on the development of rice varieties with robust crop establishment. Anaerobic germination, seed longevity, and early seedling vigor are the key traits required to achieve this. This chapter expounds on the physiology, molecular mechanisms, genetics, and relevance of the enumerated traits for direct seeding. A brief discussion of breeding for rice varieties with improved germination under direct seeding is also provided.
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Conference papers on the topic "Seedling seeds"

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Tyutyunnikova, E. M., M. A. Sanin, and T. V. Plotnikova. "THE EFFECT OF BIOREGULATOR REGOPLANT ON TOBACCO PRODUCTIVITY DURING THE SEEDING AND FIELD PERIODS." In 11-я Всероссийская конференция молодых учёных и специалистов «Актуальные вопросы биологии, селекции, технологии возделывания и переработки сельскохозяйственных культур». V.S. Pustovoit All-Russian Research Institute of Oil Crops, 2021. http://dx.doi.org/10.25230/conf11-2021-249-254.

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We studied the effect of the growth regulator Regoplant on the mass of seedlings, the quality of seedlings and the productivity of tobacco. Soaking tobacco seeds before sowing in a 0.0001 % solution of the preparation at an exposure of 6 hours, and then spraying the plants at the stage of “auricles” and “seedling ready for planting” with a working solution of an agrochemical with a 0.00001 % concentration significantly improved the quality of seedlings. This technique increases the length of tobacco seedlings to the apical point by 66 %, to the end of elongated leaves by 29 %, the mass of stems by 53 %, the mass of roots by 32 %, the diameter of the stem by 38 %. After planting the plants in the field, developed under the influence of the Regoplant stimulator, we noted an increase in productivity by 16 % and an improvement in the quality of raw materials due to an increase in carbohydrates and a decrease in proteins. The economic effect against the background of the application of Regoplant preparation amounted to 106 thousand rubles.
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Bojovic, Biljana, Milica Kanjevac, and Dragana Jakovljevic. "EFEKAT PRAJMIRANJA SEMENA PŠENICE (Triticum aestivum L.) NA SADRŽAJ FOTOSINTETSKIH PIGMENATA I UKUPNIH SOLUBILNIH PROTEINA." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.401b.

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In this paper, effect of different priming treatments in the pregerminative phase of wheat seeds (Triticum aestivum L.) on the concentration of photosynthetic pigments and total soluble proteins in the leaf of seedling was investigated. Seeds were treated with solutions of the phytohormones gibberellin and auxin (hormone priming), salts of potassium and magnesium (halo priming), ascorbic acid and hydrogen peroxide (chemo priming) and water (hydro priming). Based on the obtained results, it was determined that the content of pigments and total soluble proteins can be increased by applying the appropriate priming treatment. The most favorable effect on the examined parameters was observed in the treatment with potassium nitrate.
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Tiutiunnikova, E. M., and T. V. Plotnikova. "Influence of humic fertilizer Lignohumate on the sowing properties of seeds, seedling quality and tobacco yield." In Scientific achievements of the third millennium. SPC "LJournal", 2018. http://dx.doi.org/10.18411/scc-09-2018-12.

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ALENCAR, N. L. M., C. G. GADELHA, F. A. GONDIM, J. T. PRISCO, and E. GOMES FILHO. "OXIDATIVE STRESS STUDY OF JATROPHA CURCAS SEEDS SUBJECTED TO SALT STRESS DURING GERMINATION AND SEEDLING DEVELOPMENT." In IV Inovagri International Meeting. INOVAGRI/ESALQ-USP/ABID/UFRB/INCT-EI/INCTSal/INSTITUTO FUTURE, 2017. http://dx.doi.org/10.7127/iv-inovagri-meeting-2017-res4700860.

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Semenova, E. F., K. V. Vedernikova, and E. Yu Schetneva. "In vitro culture of Nonea pulla DC. seeds." In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-95.

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Nonea pulla DC. is a promising perennial medicinal plant growing in the Crimea. Controlled in vitro cultivation of nonea seeds allows improving the up-to-date techniques of seedlings preparation. The conducted experiments confirmed the low germinating capacity of seeds (5–9 %). To increase this parameter and to speed up the introduction process, we investigated the Nonea pulla in vitro culture. The initial phases of germination were expectedly observed during seeds cultivation. The seed swelling, rupture of pericarp and seed hull, release of germ with cotyledons, dehiscence of cotyledons were detected. Moreover, in some cases, no subsequent development was observed. However, normal germs formed in 60% of cases. Seeds also sprouted without the prior cold stratification. For the following growth, plants required a relatively simple culture medium. The maximum development conditions were reached after 1.0–1.5 months of in vitro cultivation (26±2 °С, illuminance of 2000–3000 lux, 16-hour photoperiod).
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Aleschenkova, Z. M., P. V. Rybaltovskaya, and I. N. Ananyeva. "Application of nitrogen-fixing and phosphate-mobilizing bacteria to improve the growth-promoting effect of liquid biohumus." In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-102.

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The goal of the work was to study the effect of introducing nitrogenfixing and phosphate-mobilizing bacteria into liquid biohumus on its growth-promoting properties. The group of ammonifying microorganisms dominates in the structure of microbocenosis of liquid biohumus, constituting 98.46 %. The introduction of nitrogenfixing bacterial strains B. aryabhattai Cp-1 and phosphate-mobilizing Ps. Fluorescens Pr-2 at 10 % concentration in 1 % liquid biohumus (initial pH 9.5) changes pH to 7.8. Winter wheat seed treatment with liquid biohumus enriched with Ps. Fluorescens Pr-2 increases length and dry weight of seedlings by 40.0 and 80.2%; with B. aryabhattai Ср-1 – by 16.3 and 2.0% compared to the control (1% liquid biohumus). Application of liquid biohumus enriched with pseudomonades and bacilli for the treatment of cress-lettuce seeds provides increase of length and crude weight of seedlings by 25.7 and 20.0; 5.0 and 10.0%, respectively.
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DAUTARTĖ, Anželika, Vidmantas SPRUOGIS, Romualdas ZEMECKIS, Edmundas BARTKEVIČIUS, and Algirdas GAVENAUSKAS. "THE INFLUENCE OF BIOORGANIC PREPARATIONS ON THE PRODUCTIVITY OF CONVENTIONALY GROWN WINTER RAPE ACTIVATING AND SAVING THE USE OF SYNTHETIC CHEMICALS." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.051.

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The aim was to determine the impact of Raskila bio-organic preparation on the productivity of winter rape ‘Sunday’ grown under conventional system, in order to activate and save the use of treatment Rovral aqua flo and to improve the wintering of plants. The scientific article presents the data of the conventional winter rape ‘Sunday’ growth intensity, plant formation, accumulation of dry matter, seed quality parameters, fertility data and the influence of the use of bioorganic fertilizers e. winter rape 'Sunday' seeds were coated with bioorganic preparations and synthetic treatments, and additionally sprayed with a bioorganic fertilizer solution. Agrotechnics was carried out according to the technology of winter rape growing at Aleksandras Stulginskis University Experimental station. Additional treatment of winter rape seeds and additional spraying with bioorganic fertilizers had a positive influence on the processes of growth and development of winter rape. By combining seed treatments and treatment with bio-organic Raskila fertilizers (3 l for 100 kg) and spray in autumn (3 l ha-1 ), the best results are achieved: the maximum rape seed yield was 3.87 t ha-1 and the best quality production. Bioorganic fertilizers and treatment Rovral aqua flo has significantly increased the following indicators of winter rape ‘Sunday’: the length of the plant (118.16-127.64 cm), the number of branches (6-10), seeds in the silique (28.27), the seed yield (3.16-3.87 t ha-1). The highest seed yield (3.87 l ha-1) was achieved, applying Nagro preparations in the autumn and the Rovral aqua flo treatment and spraying Raskila plants when the rape reaches a height of 5-7 cm (BBCH 10-19). Premium yield was 86.6 % compared to control. Raskila fertilizers and treatment Rovral aqua flo significantly increased the following parameters of winter rape seeds: content of fat (41.52-43.05 %), proteins (20.39-20.91%), glucosinolates decreased from 18.68 to 18.31 m mol g-1. This has improved seed quality. Treatment with Raskila and treatment Rovral aqua flo decreased seeds and seedlings infestation and morbidity due to Fusarium, Drechlera, Alternaria, Penicillium. Rates of treatment can be reduced if combined with bioorganic fertilizers. Application of bioorganic fertilizers and treatment in combination increases the effectiveness of treatment. Bio-organic fertilizer reduces plant stress caused by synthetic treatment.
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Shakhmatov, P. F., S. A. Kabanova, and M. A. Danchenko. "STIMULATING EFFECT OF PRE-SOWING TREATMENT OF COMMON PINE SEEDS." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS Volume 2. DSTU-Print, 2020. http://dx.doi.org/10.23947/interagro.2020.2.269-271.

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The results of research on pre-sowing treatment of common pine seeds with various stimulants are presented. Laboratory germination with theuse of the stimulator "Humat+7 microelements" was 59% and was 72% - with the"EridGrowwatering ". All annual seedlings were higher than the control samples in terms of the experiment options. Ithas been revealed that the most promising stimulants are "EridGrow" and "HUMATE +7 microelements"
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Lin, Shuling, Yizhu Chen, and Nanxian Zhao. "Seed Germination and Seedling Establishment of Ficus microcarpa L." In 2008 International Workshop on Geoscience and Remote Sensing (ETT and GRS). IEEE, 2008. http://dx.doi.org/10.1109/ettandgrs.2008.120.

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KEMESIUS, Martynas, Gerda SILINGIENE, Regina VASINAUSKIENE, and Remigijus ZALKAUSKAS. "THE INFLUENCE OF SEWAGE SLUDGE ON NORWAY SPRUCE (PICEA ABIES (L.) H. KARST.) SEEDLINGS GROWTH." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.079.

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The usage of biodegradable waste as sewage sludge in a proper way for tree nurseries enable to seek for ecological, waste-less, alternative to mineral fertilization farming ways. The aim of this research is to investigate impact of sewage sludge fertilizers on Norway spruce (Picea abies) two years’ seedlings growth. Research has been done in 2013-2014 at Utena State Forest Enterprise nursery. The different fertilization rates (20, 40, 60, 80, 100 t/ha) of sewage sludge were investigated and compared with control – traditional fertilization with mineral fertilizers. The impact of sewage sludge was evaluated by seedlings biometric indicators, also dry mass of sample seedlings (medium seedlings by height and diameter). The bigger rates of sewage sludge showed almost better results in exception of seeds outlet. Sewage sludge has long lasting effect on seedlings growth and could successfully shift soil fertilization by mineral fertilizers. The obtained research results confirm the similar research carried out in 2011 in Rokiskis State Forest Enterprise nursery for first year Norway Spruce seedlings.
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Reports on the topic "Seedling seeds"

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McDonald, Philip M., and John C. Tappeiner. California’s Hardwood Resource: Seeds, Seedlings, and Sprouts of Three Important Forest-Zone Species. U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, 2002. http://dx.doi.org/10.2737/psw-gtr-185.

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Navi, Shrishail S., Xiao-Bing Yang, and David Rueber. Effects of Fungicides Seed Treatments on Seedling Diseases and Yield of Soybeans. Iowa State University, Digital Repository, 2006. http://dx.doi.org/10.31274/farmprogressreports-180814-2595.

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Trujillo, M. L., R. W. Ferenbaugh, E. S. Gladney, and R. G. Bowker. Acute and chronic sulfur dioxide fumigation of Pi{tilde n}on pine seeds and seedlings: Data compilation. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10179620.

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Eaton, D., and C. E. Murphy. Toxicity test of the F-Area seep soils by laboratory lettuce seed germination and seedling growth. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10128249.

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Shelton, Michael G. Effects of seed production, seedbed condition, and overstory basal area on the establishment of shortleaf pine seedlings in the Ouachita Mountains. U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1995. http://dx.doi.org/10.2737/so-rp-293.

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