Relevant bibliographies by topics / Seed survival

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Seed survival'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Seed survival"

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ROBERTS, E. H., and R. H. ELLIS. "Water and Seed Survival." Annals of Botany 63, no. 1 (January 1989): 39. http://dx.doi.org/10.1093/oxfordjournals.aob.a087727.

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D. B. Churchill, S. C. Alderman, G. W. Mueller-Warrant, L. F. Elliott, and D. M. Bilsland. "Survival of Weed Seeds and Seed Pathogen Propagates in Composted Grass Seed Straw." Applied Engineering in Agriculture 12, no. 1 (1995): 57–63. http://dx.doi.org/10.13031/2013.25439.

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Tang, Shande, Dennis M. TeKrony, Dennis B. Egli, Paul L. Cornelius, and Marcy Rucker. "Survival Characteristics of Corn Seed during Storage: I. Normal Distribution of Seed Survival." Crop Science 39, no. 5 (September 1999): 1394–400. http://dx.doi.org/10.2135/cropsci1999.3951394x.

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Gruber, S., Weber EA, and W. Claupein. "Which soils are comfortable for oilseed rape seeds (Brassica napus) to survive?" Plant, Soil and Environment 60, No. 6 (June 2, 2014): 280–84. http://dx.doi.org/10.17221/155/2014-pse.

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The study should reveal the effects of soil texture and of seed characteristics of oilseed rape (Brassica napus L.) on seed survival in the soil by a burial experiment. Seeds of 58 conventional and new trait accessions (genetically modified and/or with altered seed ingredients) were buried for six months in sandy loam (SL), clay (c) or silty clay loam (SICL) in the seasons 2008/2009 and 2009/2010 in Germany. Between 84–93% (2008/2009) and 64–87% (2009/2010) of the conventional seeds survived in the soil, and so did 41–67% and 8–44% of the new trait seeds. Significantly more seeds were found in C and SICL compared to SL. Seed survival also significantly depended on the genotype, with high and low seed survival in both conventional and new trait accessions. Seed survival rates are probably linked with moisture and oxygen provided by different soils. As soils with good water storage conditions seem to have a higher probability for oilseed rape seeds from harvest losses to survive, other measures such as growing low dormancy varieties and proper soil tillage are especially relevant to avoid volunteers on these soils.
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Hill, N. "Endophyte survival during seed storage." NZGA: Research and Practice Series 13 (January 1, 2007): 281. http://dx.doi.org/10.33584/rps.13.2006.3143.

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SPARROW, S. D., C. W. KNIGHT, and J. S. CONN. "CANOLA SEED SURVIVAL OVER WINTER IN THE FIELD IN ALASKA." Canadian Journal of Plant Science 70, no. 3 (July 1, 1990): 799–807. http://dx.doi.org/10.4141/cjps90-097.

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Factors affecting seed survival of spring canola (Brassica campestris L. ’Tobin’), over two winters in the field at Delta Junction, Alaska were studied. In October, seeds were placed in polypropylene mesh envelopes and buried. The packets were exhumed the next spring and seed viability was determined. Factors studied included seed age, seed treatment, protection by snow-fence enclosures, burial depth, and spring retrieval date. During the first winter, survival of seeds near the soil surface until March was 65%, but many died during spring. During the second winter, seed viability in March was much lower than it had been in the previous March, but no significant mortality occurred during spring. Freshly harvested seeds generally survived better than seeds which had been stored for 1 yr. Seeds buried well below the soil surface and seeds placed inside snow-fence enclosures survived better than seeds placed near the soil surface outside enclosures. Results indicate that factors such as seed storage and protection from extreme temperatures and temperature fluctuations during late winter and early spring are important determinants of canola seed survival over winter. These factors could help explain why large populations of volunteer canola arise from seeds which have fallen from mature pods, whereas harvested, stored seeds planted during fall or early spring often produce poor stands in Alaska.Key words: Seed survival, seed mortality, seed germination, seed dormancy, seed overwintering, volunteer canola
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Tsuyuzaki, Shiro. "Seed survival for three decades under thick tephra." Seed Science Research 20, no. 3 (May 19, 2010): 201–7. http://dx.doi.org/10.1017/s0960258510000139.

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AbstractSeed longevity in situ is a prerequisite for understanding the life histories and community dynamics of species, although long-term longevity under thick tephra has not been documented because of a lack of opportunity and/or awareness. The seed bank for this study was estimated by both germination and flotation tests. Seeds of 17 species have survived with high density, having been buried under thick tephra for 30 years, since the 1977–1978 eruptions on Mount Usu, Hokkaido Island, northern Japan. The total seed density was >1000/m2. Rumex obtusifolius was the most common seed-bank species for 30 years, but decreased in density between 20 and 30 years. More seeds of Hypericum erectum occurred in deeper soil. The total seed density decreased gradually for 30 years, but H. erectum and Juncus effusus did not decline. Native seeds tended to be viable longer than exotic seeds. These results suggest that small, native seeds tend to survive longer with deep burial, while the more numerous weedy, exotic seeds located at the soil surface declined faster. The seed bank provides long-term monitoring of seed survival under natural conditions, and could be used to detect genetic changes.
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Tsuyuzaki, Shiro. "Survival characteristics of buried seeds 10 years after the eruption of the Usu volcano in northen Japan." Canadian Journal of Botany 69, no. 10 (October 1, 1991): 2251–56. http://dx.doi.org/10.1139/b91-282.

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In the crater basin of the Usu volcano, where the vegetation has almost completely been destroyed by 1977–1978 eruptions, a study was conducted in 1987 to determine the survival characteristics of buried seed populations. A total of 17 618 seeds were extracted from six 25-L former topsoil blocks by a flotation test. Data showed that even after 10 years burial by 65–140 cm volcanic deposists, 16.6% of the seeds, representing 25 species, were viable. There were few predators in the former topsoil below the thick volcanic deposits. Seed volume of most species was less than 2.0 mm3 and smaller seeds had a greater rate of survival than larger seeds. Seed survival rates of Poa annua, Rumex obtusifolius, Alopecurus aequalis var. amurensis, and Viola grypoceras were positively correlated with the thickness of volcanic deposits, suggesting that the most important factor for seed survival is stable soil temperature with little diurnal fluctuations. Absence of light may be an important variable in seed survival, but this factor did not sufficiently explain survival under the thick volcanic deposits. Key words: buried seed, burial depth, seed size, seed survival, soil temperature, volcano Usu.
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O'Farrill, Georgina, Colin A. Chapman, and Andrew Gonzalez. "Origin and deposition sites influence seed germination and seedling survival of Manilkara zapota: implications for long-distance, animal-mediated seed dispersal." Seed Science Research 21, no. 4 (August 5, 2011): 305–13. http://dx.doi.org/10.1017/s0960258511000201.

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AbstractThe distribution and dynamics of plant populations depend on the recruitment of young individuals, which is influenced by seed production, animal seed dispersal, dispersal distance, and the deposition of seeds in favourable places for seed germination/establishment and seedling survival. In particular, seeds dispersed over long distances will likely encounter new environmental conditions that occur at large spatial scales, with seed and seedling survival influenced by the adaptation of plant populations to soil and climate conditions. In this paper, it is hypothesized that seed germination and seedling survival probabilities depend on seed origin and deposition sites. A reciprocal seed and seedling transplant experiment was carried out with zapote seeds (Manilkara zapota) to determine the effect of origin and deposition sites on seed germination and seedling survival over a year in the Greater Calakmul Region of Mexico. Two origin and two deposition sites were selected that show different soil moisture levels within the habitat of the Baird's tapir, a major seed disperser of M. zapota seeds. The results show that sites of origin and deposition influenced seed germination and seedling survival probabilities. This suggests that the displacement of seeds far from parent trees, while potentially reducing intraspecific competition, does not ensure their survival, and that seeds need to be deposited in microsites within their environmental tolerance for dispersal to be successful. Furthermore, this paper emphasizes the importance of field experiments to provide strong inference about the effects of environmental conditions on recruitment and distribution of plant species.
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Merritt, D. J., D. H. Touchell, K. W. Dixon, J. A. Plummer, and D. W. Turner. "Moisture content influences survival of cryostored seed of Banksia ashbyi (Proteaceae)." Australian Journal of Botany 48, no. 5 (2000): 581. http://dx.doi.org/10.1071/bt99033.

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Seed survival of cryostorage (–196˚C) was examined for Banksia ashbyi (E.G.Baker), a tree species endemic to Western Australia. Seeds were cryostored over a moisture content range of 3–30%. Moisture contents of 18–20% significantly depressed survival for seed of all ages tested (1 month to 13 years old). Cryostorage at seed moisture contents below 18% did not affect seed germination or vigour (radicle growth). Seed age influenced survival with freshly harvested seeds showing a greater tolerance to cryostorage at high moisture contents than older seeds. Exotherms, indicating ice formation within seed tissues, were detected by thermal analysis at seed moisture contents above the critical. However, there was no increase in electrolyte efflux from seeds frozen at lethal moisture contents, suggesting the plasma membrane of cells remained intact. This study shows that seed storage physiology of a Western Australian species is similar to that of other orthodox species and that cryostorage may be successfully applied for conservation of native species without detrimental effects on germination and growth.
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Dissertations / Theses on the topic "Seed survival"

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Wood, Christopher. "Oxidative stress and seed survival." Thesis, Abertay University, 1998. https://rke.abertay.ac.uk/en/studentTheses/79d28b74-9210-4ebd-a3b8-66a610bd8c87.

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Free radical and aldehydic breakdown product content were determined, by EPR and UV / visible spectroscopy, primarily in intermediate (desiccation tolerant) seeds of Carica papaya L. (Papaya) and recalcitrant (desiccation intolerant) seeds of Aesculus hippocastanum L. (Horse chestnut), but also in other species covering a range of desiccation tolerances, with a view to determining the role of oxidative stress as a diagnostic marker for desiccation tolerance. Axes of non-senescent highly viable recalcitrant seeds of horse chestnut were metabolically active, contained products of lipid peroxidation, displayed low levels of enzymatic protection against activated oxygen and peroxides, and a two-peak free radical EPR signal. During fully hydrated storage at 16 °C for up to 18 months, seeds exhibited, sequentially, an increase in germination rate, a transient increase in intensities of both the low field and high field EPR peaks, a significant increase in membrane leakage and decrease in seed viability, germination rate, and SOD and peroxidase activities. Drying 'unstored' seeds below and embryonic axis moisture content of 40 to 50 % initiated viability loss. At < 25 % moisture content all axes were inviable and displayed a 2- to 4-fold increase in solute leakage, lipid peroxidation products and the low field EPR signal. Seed desiccation sensitivity increased with hydrated storage. The accumulation of lipid peroxidation products and free radicals on drying generally occurred to a greater extent, or at a higher moisture content, than observed with unstored seeds. The results indicate a mediating role for oxidative stress in recalcitrant seed viability loss which is differentially expressed during hydrated, 'natural' ageing and desiccation. Similar trends were seen in other recalcitrant species with the increase in lipid peroxidation products occurring around the point of viability loss. However the study of a more orthodox species (papaya) revealed no such trends.
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Butler, Laura Helen. "Seed development, re-hydration and variation in seed survival." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440098.

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Leon-Lobos. "Nothofagus and Fagus seed survival after dessication and storage." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339979.

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Kuprewicz, Erin Kathleen. "The Effects of Large Terrestrial Mammals on Seed Fates, Hoarding, and Seedling Survival in a Costa Rican Rain Forest." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/391.

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Terrestrial mammals affect numerous aspects of plant demography, colonization, and community structure in Neotropical forests. Granivorous mammals destroy seeds via seed predation and seedlings through herbivory, negatively affecting plant fitness. Mammals can also positively affect plants by dispersing or hoarding seeds. Seed fate outcomes are contingent on the interaction between mammal seed handling strategies and the intrinsic anti-predation defenses possessed by seeds. In field experiments at La Selva Biological Station, I investigated how collared peccaries (Pecari tajacu) and Central American agoutis (Dasyprocta punctata) affect five species of large seeds that have various defenses against predation. Overall, peccaries consumed and killed most non-defended and chemically-defended seeds but they could not destroy seeds with physical defenses. Agoutis killed non-defended and physically-defended seeds, but not seeds with chemical defenses. Using seeds of Mucuna holtonii, I investigated how chemical and structural defenses deter mammal and insect seed predation respectively. I also determined how endosperm removal by invertebrates affects seed germination and seedling biomass. Chemical defenses protected seeds from rodents, but not ungulates that digest seeds via pregastric fermentation. Physical defenses protected seeds from invertebrate seed predators, and removal of endosperm negatively affected both seed germination and seedling growth. To determine how scatter-hoarding by agoutis affects seed escape from seed predators, germination, and seedling growth, I created simulated agouti hoards. I also investigated how mammals affect young seedling survival. Hoarding enhanced seed survival, germination, and seedling growth for most species of seeds. Terrestrial mammals killed some seedlings via seed predation rather than by herbivory. Overall, large mammal activity in La Selva negatively affected seed and seedling survival and this likely influences many aspects of forest dynamics.
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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.
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.
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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Johansson, Björn. "Stay below water! - a strategy to avoid seed predators : - seed survival and germination of Mauritia flexuosa in southeastern Peru." Thesis, Ecology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19930.

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The tropical palm Mauritia flexuosa has highly nutritious fruits and is an important food resource for both humans and wildlife throughout its geographic range in South America. Unsustainable harvesting threatens wild populations. Mauritia f. occurs primarily in wetlands called Aguajales where it can become the dominating canopy species. Seed predation and dispersal can dramatically affect the survival and distribution of plant species in tropical rainforests (Janzen 1970, Connell 1971, Bleher & Böhning-Gaese 2001, Paine & Beck 2007, Mari et al. 2008). Increased knowledge of seed predation and germination requirements is essential for successful management of this commercially and ecologically important palm. Four experiments were conducted in Manu National Park in southeastern Peru to study: (1) Seed survival in the Aguajal, (2) Quantify seed predators on dry land, (3) Insect visitors and consumers of fruits and seeds, and (4) Germination in greenhouse experiments. Seed survival was significantly higher below water compared to on dry micro sites within the Aguajal. Seeds and fruits placed on dry land were preyed upon by both insects and mammals. Terrestrial insects were the most important predators. Different insects visited fruits and seeds, indicating a successive breakdown of different tissues. Seed survival was also higher below water and/or soil in the greenhouse experiment. This may suggest that the distribution of Mauritia f. is highly influenced by seed predation and that water protects seeds from their insect enemies.

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Roselli, Sasha Mahani. "The role of seed dispersal, seed predation and drought in the restoration of Ngel Nyaki Forest, Nigeria." Thesis, University of Canterbury. School of Biological Sciences, 2014. http://hdl.handle.net/10092/9967.

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Abstract The restoration of degraded landscapes has become one of our most valuable tools for conservation, however there are many factors which can restrict natural regeneration and impede active restoration attempts. The purpose of this study was to investigate three key processes which commonly limit the establishment of forest tree species into abandoned pasture in tropical forests: i) dispersal limitation, ii) seed predation, and iii) competition from the grass sward. Seed dispersal I identified 59 species of birds that were using the grassland habitat. Through 216 hours of focal tree observations I established that isolated trees in the grassland that had larger canopies, and those that were providing a food source (i.e. flowers or fruit) had significantly higher bird visitation rates and average stay lengths. I found evidence of the “perch effect” as patches of remnant trees encouraged more birds into areas of grassland, and the density of seedlings under tree canopies was significantly positively correlated with bird visitations. 95% of the seedlings found beneath tree canopies in grassland were of a different species to that of the tree canopy above them, demonstrating the dispersal of seeds from elsewhere into these microhabitats. 98% of these seedlings are grassland or forest edge species showing forest core species are still dispersal or microsite limited despite the effect of these trees. Seed predation Removal rates of seeds from experimentally laid out seed piles varied among seed species, the habitat the pile was in, and the predator guild able to access the piles. Preliminary results indicate that these trends are driven by the ecology of the seed predator. Removal of seeds by vertebrates was highest in the core forest, while ant predation was constant across all habitats. Vertebrates removed the larger seeds (Entandrophragma angolense and Sterculia tragacantha) while ants preferred the smaller Celtis gomphophylla and Croton macrostachyus. Overall predation rates in grassland were lower than those in the forest, and the presence of remnant trees did not influence predation rates, a positive sign for regeneration and the survival of seeds dispersed into these areas. Competition from the grass sward While the grass sward provides shade for seedlings of forest tree species it is also a harsh environment for them, as the grass competes with seedlings for water. Removing the grass and covering planted seedlings with artificial shading structures significantly increased both the survival and growth of these seedlings. Recommendations From this study I was able to make recommendations for a low input restoration program at Ngel Nyaki. Planting seedlings in small „islands‟ takes advantage of the natural increase in dispersal of seeds under isolated trees, while low seed predation rates increase the chance of survival of these seeds to germination. Planting these seedlings under shade will lead to increases both their growth rates and their survival. Once the secondary forest develops, under-planting seedlings of core forest trees will introduce them to the system, as the natural establishment of these seeds appears to be limited in the current environment. This study has also served to remind us how little we know about this particular forest-grassland system, and has led to the development of ideas for further investigations into several more aspects of regeneration.
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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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Melifronidou, Anthemis Ioanni. "Influence of storage conditions and fungal activity on the survival of vegetable seeds." Thesis, University of Salford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308208.

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Santos, Marta Sofia Sousa. "Efeito de pré-tratamentos na germinação de sementes da espécie Corema album L.(subsp. album)." Master's thesis, ISA, 2013. http://hdl.handle.net/10400.5/6462.

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Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de Agronomia
Corema album (Ericaceae) endemic of the Atlantic dunes of the Iberian Peninsula has the possibility to become a new niche berry crop. Considering the agronomic and market possibilities for this specie we characterized C. album populations along its biogeographical area. The results show that different seeds characteristics differ significantly between sites. We also tested the effect of pretreatments on the germination of C. album seeds (subsp. album). Seeds were collected from Duna de Quiaios in 2011, from Comporta in 2011 and Aldeia do Meco in 2011 and in 2012. The results show that there is site-to-site variation in the same year and year-to-year variation in a particular site in percentage of germinated seeds. Acid scarification (30, 60 and 120 minutes) followed by 1000 ppm of gibberellic acid was the most effective pretreatment in breaking dormancy of C. album and this pretreatment promote the best germination from seeds collected from Aldeia do Meco 2011 (30.3%) after 175 days. Our results suggest that the seeds had morphophysiological dormancy. Considering the 4600 seeds collected: 54.5% had ruptured the seed coat, 7.4% had germinated and seedling survival was 0.1%.
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Books on the topic "Seed survival"

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Tauer, Charles G. Seed source influences juniper seedling survival under severe drought stress. [Fort Collins, Colo.?]: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1987.

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Siddiqui, M. R. Survival of Septoria nodorum Berk. in wheat seed stored at 5°C. [Copenhagen]: [Institute of Seed Pathology for Developing Countries], 1989.

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Billetoft, Jørgen. Micro activities in Bangladesh: Seed bed of entrepreneurship or simply a means of survival. Copenhagen, Denmark: Centre for Development Research, 1993.

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Gamble, William E. Survival and growth of Douglas-fir seed sources in the Hospital Tract rangewide source archive plantation. Corvallis, Or: College of Forestry, Forest Research Laboratory, Oregon State University, 1996.

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Page-Dumroese, Deborah S. Relationship of seed microsite to germination and survival of lodgepole pine on high-elevation clearcuts in northeastern Utah. Fort Collins, Colo: RMRS Rocky Mountain Research Station, 2002.

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Never, ever bite into a seed of the lanzones (and other tall tales): A survival guide for visitors to Manila. San Juan, Metro Manila, Philippines: Books for Pleasure, 1999.

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H, Brown James. Survival and growth of trees of a Canaan Valley, West Virginia seed source in relation to varying soil/site conditions. Wooster: Ohio Agricultural Research and Development Center, 2000.

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Isaacson, Judith Magyar. Seed of Sarah: Memoirs of a survivor. Urbana: University of Illinois Press, 1990.

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Seed of Sarah: Memoirs of a survivor. 2nd ed. Urbana: University of Illinois Press, 1991.

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Grant, Katy. Hide and seek. Atlanta: Peachtree, 2010.

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Book chapters on the topic "Seed survival"

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Gutterman, Yitzchak. "Germination, the Survival of Seedlings and Competition." In Seed Germination in Desert Plants, 207–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-75698-6_6.

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Somasegaran, Padma, and Heinz J. Hoben. "Testing the Survival of Rhizobia on Inoculated Seeds." In Handbook for Rhizobia, 259–64. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4613-8375-8_29.

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Shah, Wajed A., Salina Jahan Nuri, N.Begum, M. F. Haq, K. Naher, and M. I. Zuberi. "7. Local Vegetable Seed Storage Methods and Women’s Participation in Development; Medicinal Plants for the Survival of Rural People; Indigenous Medicinal Plant Use, Sustainabilty and Biodiversity: Learning from the Grameen Bank Experience." In Indigenous Knowledge Development in Bangladesh, 91–114. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 2000. http://dx.doi.org/10.3362/9781780445748.007.

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Liu, Zhenqiu, Dechang Chen, Guoliang Tian, Man-Lai Tang, Ming Tan, and Li Sheng. "Efficient Support Vector Machine Method for Survival Prediction with SEER Data." In Advances in Experimental Medicine and Biology, 11–18. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-5913-3_2.

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Phillips, Lisa. "‘Hide and Seek: Stories of Survival’: Solving the Problem of the Pencil." In Holocaust Education in Primary Schools in the Twenty-First Century, 199–218. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73099-8_12.

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Li, Jixin, Ilya Muchnik, and Dona Schneider. "Influences on breast cancer survival via SVM classification in the SEER database." In DIMACS Series in Discrete Mathematics and Theoretical Computer Science, 233–42. Providence, Rhode Island: American Mathematical Society, 2007. http://dx.doi.org/10.1090/dimacs/070/12.

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Cirvilleri, G., P. Bella, R. La Rosa, and V. Catara. "Internalization and Survival of Pseudomonas corrugata from Flowers to Fruits and Seeds of Tomato Plants." In Pseudomonas syringae Pathovars and Related Pathogens – Identification, Epidemiology and Genomics, 73–79. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6901-7_8.

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Ramos, M. L. G., and W. Q. Ribeiro. "Effect of fungicides on survival of Rhizobium on seeds and the nodulation of bean (Phaseolus vulgaris L.)." In Enhancement of Biological Nitrogen Fixation of Common Bean in Latin America, 145–50. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2100-2_16.

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Gaufman, Elizaveta. "Cybercrime and Punishment: Security, Information War, and the Future of Runet." In The Palgrave Handbook of Digital Russia Studies, 115–34. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42855-6_7.

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AbstractCybersecurity à la Russe is marked by the authoritarian nature of the state that is primarily concerned by the question of regime survival. This logic motivates continuous securitization of the Internet that is framed as a potential accessory to crimes committed both by foreign and domestic actors. This chapter aims to show the discrepancies in Russian cyber politics at home and abroad, highlighting its struggle for more internet regulation that is seen by the Russian government as a panacea against perceived external attempts at regime change while exploiting digital public spaces abroad. At the same time, this chapter shows that despite seemingly formidable “cyber army” capabilities for external use, domestic surveillance and attempts to build a Great Russian Firewall are still lacking.
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"Seed survival." In Terrestrial Orchids, 28–38. Cambridge University Press, 1995. http://dx.doi.org/10.1017/cbo9780511525452.004.

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Conference papers on the topic "Seed survival"

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Crespo, Andre. "Survival of sugarcane borer on Bt maize and refuge from seed blends." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.112937.

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Теплякова, Ольга, and Наталия Власенко. "Использование супрамолекулярных комплексов тебуконазола с экстрактом корней солодки для контроля обыкновенной корневой гнили в посевах яровой пшеницы." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.35.

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The fungicidal activity of tebuconazole supramolecular complexes with licorice root extract used as a spring wheat seed protectant was evaluated. Their single use at the stage of preparation for sowing made it possible to effectively control the development and prevalence of common root rot during the growing season. The strength of the fungicidal effect depended on the rate of consumption of complexes. All tested compounds provided increased density of standing crops, plant survival for harvesting and grain productivity of the crop.
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Konstantinovich, A. V., A. S. Kuracheva, and E. D. Binkevich. "Improvement of separate elements of the techno-logy of cultivation of white cabbage in the conditions of the of the central region of the non-chernozem zone." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-145.

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In conditions of climate change, when temperature and precipitation fluctuations occur more and more frequently during the growing season, it is necessary to obtain high quality seedlings with "immunity" to various stress factors, including high weediness, the damage from which is associated with a decrease in yield (by 25 -35%) and with a deterioration in the quality of agricultural products. Due to the imbalance in production technology, seedlings are often weakened, overgrown, with a low yield per unit area and survival rate in the field. One of the solutions to this problem is the use of PP for pre-sowing seed treatment to increase the competitiveness of seedlings in the field.
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Baxter, Patricia A., Zhigang Liu, Xuimei Zhao, Hua Mao, Yulung Huang, Yujing Zhang, Jack M. Su, et al. "Abstract 2364: Identification of therapy resistant pediatric brain tumor cells that have extraordinary survival and tumorigenic capabilities: The ultimate seed cells that drives the growth of autopsied tumor cells in mouse brains." In Proceedings: AACR 103rd Annual Meeting 2012‐‐ Mar 31‐Apr 4, 2012; Chicago, IL. American Association for Cancer Research, 2012. http://dx.doi.org/10.1158/1538-7445.am2012-2364.

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Skrypnyk, Iryna. "Finding Survival Groups in SEER Lung Cancer Data." In 2012 Eleventh International Conference on Machine Learning and Applications (ICMLA). IEEE, 2012. http://dx.doi.org/10.1109/icmla.2012.191.

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Al-Bahrani, Reda, Ankit Agrawal, and Alok Choudhary. "Colon cancer survival prediction using ensemble data mining on SEER data." In 2013 IEEE International Conference on Big Data. IEEE, 2013. http://dx.doi.org/10.1109/bigdata.2013.6691752.

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Singh, Nisha. "Cohort study of vulvar cancer cases over a period of 10 years." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685356.

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Objective: To study the risk factors, management protocols and outcome of vulvar cancer cases over a period of 10 years in a tertiary care hospital. Methods: It is a retrospective cohort study of vulvar cancer from January 2004 to January 2014 at King George Medical University, Lucknow. Hospital records of 41 patients with histologically proven diagnosis of vulvar cancer were studied from Department of Obstetrics and Gynecology and Department of Radiotherapy. The presence of risk factors, stage of disease, treatment modalities used and disease outcome in terms survival were studied. The data collected was analyzed and compared with the published literature. Results: The mean age for diagnosis of vulvar cancer was 52 years and peak incidence was seen in age group of 50-70 years. Incidence was significantly more in multiparous (p = 0.001) and postmenopausal women (p = 0.007). An average of 4.1 cases were seen per year. 97.56% cases were squamous cell carcinomas including one case of verrucous carcinoma. Only one non-squamous case of Bowen’s disease was seen. 20 cases belonged to early stage (1 and 2) while 21cases had advanced disease (3 and 4). 48.78% cases were primarily treated with surgery, 26.83% with radiotherapy, 7.3% with chemotherapy and 17.07% with combined chemoradiation. 78% of surgically treated cases had mean survival of 5 years. Mean survival of 1 year was recorded in advanced disease cases. Limitation of the study was poor follow up after treatment. Conclusion: Incidence of vulvar cancer is significantly high in multiparous and postmenopausal women. Surgical treatment is the best option in early stage of disease (stage I and II) and gives high survival rates while advanced disease treated with chemoradiation has poor survival.
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Wallace, Nathan J., and Anand K. Devaiah. "Gains Realized in Pituitary Carcinoma Survival: A Contemporary Evaluation Using the Seer Database." In 30th Annual Meeting North American Skull Base Society. Georg Thieme Verlag KG, 2020. http://dx.doi.org/10.1055/s-0040-1702448.

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Garg, Poonam. "Leiomyosarcoma: Case report." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685339.

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Introduction: Uterine sarcomas are rare aggressive mesenchymal tumours with limited prognosis which accounts for only 2%-8% of all uterine malignancies. The most frequent type in uterine sarcomas is leiomyosarcoma (LMS) which is seen in about 60% of cases. Case Report: We report 2 cases who presentated with different symptomology. After examination and imaging modalities, definitive diagnosis was made after histopathology report. Treatment in the form of neo adjuvant chemotherapy followed by Surgery and chemotherapy/radiotherapy was given. On follow up, both patients had relapse and later they died. Conclusion: Rate of recurrence of leiomyosarcoma is high and prognosis depends upon age, grade, tumor size and mitotic rate. Overall survival rate ranges from 15% to 25% with a median survival of only 10 months. Early detection and more trials to evaluate treatment strategies can improve survival.
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Anusim, Nwabundo, Filip Ionescu, John Khoury, Anish Konde, and Ishmael Jaiyesimi. "Abstract P6-15-05: Demographics and survival in metastatic inflammatory breast cancer. SEER data analysis." In Abstracts: 2019 San Antonio Breast Cancer Symposium; December 10-14, 2019; San Antonio, Texas. American Association for Cancer Research, 2020. http://dx.doi.org/10.1158/1538-7445.sabcs19-p6-15-05.

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Reports on the topic "Seed survival"

1

Winkel, V. K. Effects of seed origin and irrigation on survival and growth of transplanted shrubs. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/106545.

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Page-Dumroese, Deborah S., R. Kasten Dumroese, Connie M. Carpenter, and David L. Wenny. Relationship of seed microsite to germination and survival of lodgepole pine on high-elevation clearcuts in northeastern Utah. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2002. http://dx.doi.org/10.2737/rmrs-rn-14.

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Hutchinson, M. L., J. E. L. Corry, and R. H. Madden. A review of the impact of food processing on antimicrobial-resistant bacteria in secondary processed meats and meat products. Food Standards Agency, October 2020. http://dx.doi.org/10.46756/sci.fsa.bxn990.

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For meat and meat products, secondary processes are those that relate to the downstream of the primary chilling of carcasses. Secondary processes include maturation chilling, deboning, portioning, mincing and other operations such as thermal processing (cooking) that create fresh meat, meat preparations and ready-to-eat meat products. This review systematically identified and summarised information relating to antimicrobial resistance (AMR) during the manufacture of secondary processed meatand meat products (SPMMP). Systematic searching of eight literature databases was undertaken and the resultantpapers were appraised for relevance to AMR and SPMMP. Consideration was made that the appraisal scores, undertaken by different reviewers, were consistent. Appraisal reduced the 11,000 initially identified documents to 74, which indicated that literature relating to AMR and SPMMP was not plentiful. A wide range of laboratory methods and breakpoint values (i.e. the concentration of antimicrobial used to assess sensitivity, tolerance or resistance) were used for the isolation of AMR bacteria.The identified papers provided evidence that AMR bacteria could be routinely isolated from SPMMP. There was no evidence that either confirmed or refuted that genetic materials capable of increasing AMR in non-AMR bacteria were present unprotected (i.e. outside of a cell or a capsid) in SPMMP. Statistical analyses were not straightforward because different authors used different laboratory methodologies.However, analyses using antibiotic organised into broadly-related groups indicated that Enterobacteriaceaeresistant to third generation cephalosporins might be an area of upcoming concern in SPMMP. The effective treatment of patients infected with Enterobacteriaceaeresistant to cephalosporins are a known clinical issue. No AMR associations with geography were observed and most of the publications identified tended to be from Europe and the far east.AMR Listeria monocytogenes and lactic acid bacteria could be tolerant to cleaning and disinfection in secondary processing environments. The basis of the tolerance could be genetic (e.g. efflux pumps) or environmental (e.g. biofilm growth). Persistent, plant resident, AMR L. monocytogenes were shown by one study to be the source of final product contamination. 4 AMR genes can be present in bacterial cultures used for the manufacture of fermented SPMMP. Furthermore, there was broad evidence that AMR loci could be transferred during meat fermentation, with refrigeration temperatures curtailing transfer rates. Given the potential for AMR transfer, it may be prudent to advise food business operators (FBOs) to use fermentation starter cultures that are AMR-free or not contained within easily mobilisable genetic elements. Thermal processing was seen to be the only secondary processing stage that served as a critical control point for numbers of AMR bacteria. There were significant linkages between some AMR genes in Salmonella. Quaternary ammonium compound (QAC) resistance genes were associated with copper, tetracycline and sulphonamide resistance by virtue of co-location on the same plasmid. No evidence was found that either supported or refuted that there was any association between AMR genes and genes that encoded an altered stress response or enhanced the survival of AMR bacteria exposed to harmful environmental conditions.
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Saville, Alan, and Caroline Wickham-Jones, eds. Palaeolithic and Mesolithic Scotland : Scottish Archaeological Research Framework Panel Report. Society for Antiquaries of Scotland, June 2012. http://dx.doi.org/10.9750/scarf.06.2012.163.

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Why research Palaeolithic and Mesolithic Scotland? Palaeolithic and Mesolithic archaeology sheds light on the first colonisation and subsequent early inhabitation of Scotland. It is a growing and exciting field where increasing Scottish evidence has been given wider significance in the context of European prehistory. It extends over a long period, which saw great changes, including substantial environmental transformations, and the impact of, and societal response to, climate change. The period as a whole provides the foundation for the human occupation of Scotland and is crucial for understanding prehistoric society, both for Scotland and across North-West Europe. Within the Palaeolithic and Mesolithic periods there are considerable opportunities for pioneering research. Individual projects can still have a substantial impact and there remain opportunities for pioneering discoveries including cemeteries, domestic and other structures, stratified sites, and for exploring the huge evidential potential of water-logged and underwater sites. Palaeolithic and Mesolithic archaeology also stimulates and draws upon exciting multi-disciplinary collaborations. Panel Task and Remit The panel remit was to review critically the current state of knowledge and consider promising areas of future research into the earliest prehistory of Scotland. This was undertaken with a view to improved understanding of all aspects of the colonization and inhabitation of the country by peoples practising a wholly hunter-fisher-gatherer way of life prior to the advent of farming. In so doing, it was recognised as particularly important that both environmental data (including vegetation, fauna, sea level, and landscape work) and cultural change during this period be evaluated. The resultant report, outlines the different areas of research in which archaeologists interested in early prehistory work, and highlights the research topics to which they aspire. The report is structured by theme: history of investigation; reconstruction of the environment; the nature of the archaeological record; methodologies for recreating the past; and finally, the lifestyles of past people – the latter representing both a statement of current knowledge and the ultimate aim for archaeologists; the goal of all the former sections. The document is reinforced by material on-line which provides further detail and resources. The Palaeolithic and Mesolithic panel report of ScARF is intended as a resource to be utilised, built upon, and kept updated, hopefully by those it has helped inspire and inform as well as those who follow in their footsteps. Future Research The main recommendations of the panel report can be summarized under four key headings:  Visibility: Due to the considerable length of time over which sites were formed, and the predominant mobility of the population, early prehistoric remains are to be found right across the landscape, although they often survive as ephemeral traces and in low densities. Therefore, all archaeological work should take into account the expectation of Palaeolithic and Mesolithic ScARF Panel Report iv encountering early prehistoric remains. This applies equally to both commercial and research archaeology, and to amateur activity which often makes the initial discovery. This should not be seen as an obstacle, but as a benefit, and not finding such remains should be cause for question. There is no doubt that important evidence of these periods remains unrecognised in private, public, and commercial collections and there is a strong need for backlog evaluation, proper curation and analysis. The inadequate representation of Palaeolithic and Mesolithic information in existing national and local databases must be addressed.  Collaboration: Multi-disciplinary, collaborative, and cross- sector approaches must be encouraged – site prospection, prediction, recognition, and contextualisation are key areas to this end. Reconstructing past environments and their chronological frameworks, and exploring submerged and buried landscapes offer existing examples of fruitful, cross-disciplinary work. Palaeolithic and Mesolithic archaeology has an important place within Quaternary science and the potential for deeply buried remains means that geoarchaeology should have a prominent role.  Innovation: Research-led projects are currently making a substantial impact across all aspects of Palaeolithic and Mesolithic archaeology; a funding policy that acknowledges risk and promotes the innovation that these periods demand should be encouraged. The exploration of lesser known areas, work on different types of site, new approaches to artefacts, and the application of novel methodologies should all be promoted when engaging with the challenges of early prehistory.  Tackling the ‘big questions’: Archaeologists should engage with the big questions of earliest prehistory in Scotland, including the colonisation of new land, how lifestyles in past societies were organized, the effects of and the responses to environmental change, and the transitions to new modes of life. This should be done through a holistic view of the available data, encompassing all the complexities of interpretation and developing competing and testable models. Scottish data can be used to address many of the currently topical research topics in archaeology, and will provide a springboard to a better understanding of early prehistoric life in Scotland and beyond.
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