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Rozprawy doktorskie na temat „Seed dormancy”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Xia, Qiong. "Molecular aspects of temperature regulation of sunflower seed dormancy." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066629/document.

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La graine est le produit de la reproduction sexuée chez les Angiospermes. Elle assure la survie et la dispersion de l'espèce. La germination des graines est la première étape de la croissance des plantes. La transition entre l'état de dormance des graines et leur germination est une étape clef dans le cycle de vie des plantes qui a des conséquences écologique et commerciale. Depuis plusieurs décennies, de nombreux facteurs de l'environnement ont été étudiés pour leurs implications et leurs conséquences dans le processus de dormance et de germination des graines. Les études sur la réponse des s

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Xia, Qiong. "Molecular aspects of temperature regulation of sunflower seed dormancy." Electronic Thesis or Diss., Paris 6, 2016. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2016PA066629.pdf.

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La graine est le produit de la reproduction sexuée chez les Angiospermes. Elle assure la survie et la dispersion de l'espèce. La germination des graines est la première étape de la croissance des plantes. La transition entre l'état de dormance des graines et leur germination est une étape clef dans le cycle de vie des plantes qui a des conséquences écologique et commerciale. Depuis plusieurs décennies, de nombreux facteurs de l'environnement ont été étudiés pour leurs implications et leurs conséquences dans le processus de dormance et de germination des graines. Les études sur la réponse des s

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Tavakkol, Afshari Reza. "Variation in seed dormancy of tetraploid wheat." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ37916.pdf.

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Dzomeku, Israel K. "Modelling seed dormancy, germination and emergence of Striga hermonthica." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252261.

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5

Stutchbury, P. A. "The regulation of seed dormancy in the genus Acer." Thesis, University of Bristol, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379534.

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6

Barros, Galvão Thiago. "Regulation of seed dormancy and germination in Arabidopsis thaliana." Thesis, University of York, 2016. http://etheses.whiterose.ac.uk/15593/.

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Seed germination is one of the most important developmental steps in the life cycle of a higher plant. Because of this, seed producing plants have evolved mechanisms, such as dormancy, that time germination based on environmental cues. The present study uses Arabidopsis thaliana as a model to address questions about seed dormancy and germination. Three different lines of investigation were followed. The first involved an investigation of how light quality regulates phytohormones in order to control germination. This identified a light-dependent mechanism that differentially regulates expressio

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7

Jayasuriya, Kariyawasam Marthinna Gamage Gehan. "COMPARATIVE BIOLOGY OF SEED DORMANCY-BREAK AND GERMINATION IN CONVOLVULACEAE (ASTERIDS, SOLANALES)." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_diss/639.

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The biology of seed dormancy and germination of 46 species representing 11 of the 12 tribes in Convolvulaceae were compared in laboratory (mostly), field and greenhouse experiments. Seeds were tested for kind of dormancy and storage behavior; artificial or simulated natural treatments were applied to break physical dormancy (PY); the initial route of water entry (“water gap”) into seeds was identified; the morphoanatomy of the water gap was compared in seeds of 17 species; ontogenetical differences between water gap and seed coat away from the hilum were described in Ipomoea lacunosa seeds; cy

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8

Soltani, Ali. "Improvement of seed germination of Fagus orientalis Lipsky /." Umeå : Dept. of Silviculture, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s275.pdf.

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9

Holmberg, Kyle B. "SELECTION FOR REDUCED SEED DORMANCY IN SEVEN NATIVE GRASS SPECIES." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11052007-220827/.

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Lowland switchgrass (Panicum virgatum), big bluestem (Andropogon gerardii), indiangrass (Sorghastrum nutans), upland switchgrass (Panicum virgatum), little bluestem (Schizachyrium scoparium), beaked panicum (Panicum capillare), and purpletop (Tridens flavus) all show strong signs of seed dormancy which contributes to extremely poor field establishment. The objective of this work was to reduce seed dormancy by selecting individuals that exhibited reduced pre-stratification dormancy in laboratory tests. The classical breeding method of phenotypic recurrent selection was used to enhance germinati

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Vasquez, Castillo Wilson Arturo. "Seed production, dormancy and commercialisation of Solanum phureja in Ecuador." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415897.

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11

Wood, Laura Anne. "RELATIONSHIP BETWEEN ETHYLENE AND SEED DORMANCY RELEASE IN ECHINACEA SPECIES." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/465.

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Inconsistent seed germination poses a problem for efficient seedling production of Echinacea species. Evidence suggests that ethylene can be effective for improving germination in Echinacea species. The objectives of this research were: to develop an ethylene pre-germination treatment that enhances germination in Echinacea species that is retained following drying and storage, and to determine if the ethylene effect on enhanced germination was an important mode of action for dormancy release. Four species of Echinacea (E. purpurea, E. tennesseensis, E. angustifolia and E. simulata) treated wit

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12

Kendall, Sarah. "Temperature regulation of seed dormancy and germination in Arabidopsis thaliana." Thesis, University of York, 2012. http://etheses.whiterose.ac.uk/3109/.

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The environmental regulation of seed dormancy and germination by temperature is an important process which allows the environmental conditions experienced by plants in the following generation to be controlled. Coping with temperature effects during seed maturation is essential for the consistent production of high quality seeds, but currently temperature signalling pathways in seeds are poorly understood. Previous work has shown that temperature during seed maturation regulates the levels of dormancy which are induced in the seed, although a mechanism for this pathway is currently unknown. Lo

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13

Just, Michael. "Seed morphology, dormancy and germination of South-West Australian Ericaceae." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2018. https://ro.ecu.edu.au/theses/2051.

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The Ericaceae in South West Australia contains species with difficult to germinate seeds, including many species with deep intractable dormancy. A better understanding of seed biology and species specific dormancy, and germination mechanisms is required to overcome these difficulties. Land clearing, salinity and disease has resulted in over 125 species within 15 genera being listed as rare, highly restricted, threatened and endangered (Western Australian Herbarium 1998–). The present study examined the seed biology of eight species of Ericaceae native to Western Australia, exploring fruit and

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14

PETROLLINI, Elisa. "Medicago marina (L.) seed: unravelling mechanisms controlling germination and dormancy." Doctoral thesis, Università degli studi del Molise, 2012. http://hdl.handle.net/11695/66384.

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L’obiettivo generale di questo lavoro di tesi è studiare i complessi e poco conosciuti meccanismi che regolano la dormienza e la germinazione del seme di Medicago marina (L.), una specie mediterranea presente sulle coste dell’intera penisola italiana e che si è adattata a vivere in habitat specializzati come le dune. I semi di questa specie sono caratterizzati da una forte dormienza che ne impedisce la germinazione e i risultati ottenuti durante il primo periodo del corso di dottorato, sono stati recentemente pubblicati (Scippa et al., 2011). I meccanismi che regolano dormienza/germinazione e

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15

Baker, Katherine S. "Seed germination and dormancy in south-western Australian fire ephemerals and burial as a factor influencing seed responsiveness to smoke." University of Western Australia. School of Plant Biology, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0091.

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[Truncated abstract] Fire ephemerals are pioneer species that germinate in large numbers after fire and generally live for between six months and four years. Seeds produced during the short life span of these plants persist in the soil seedbank until a subsequent fire. This study examined the dormancy characteristics and germination requirements of ten Australian fire ephemeral species from five families. Seeds of four species germinated at one or more incubation temperatures in the laboratory, indicating that a proportion of their seedlots were non-dormant at the time of testing. Austrostipa

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16

Favier, John F. "The effect of drying and storage regime on the germination of malting barley." Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238785.

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Jones, Stephen Keith. "Sitka spruce (Picea sitchensis [Bong.] Carr.) seed germination in relation to seed development, dormancy and storage." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283746.

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Bazaid, Salih Ali Mohamed. "Seed development and the induction of dormancy in the genus Acer." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327965.

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19

Liu, Yinggao. "Molecular signaling in the seed dormancy release and germination in arabidopsis." HKBU Institutional Repository, 2009. http://repository.hkbu.edu.hk/etd_ra/1096.

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Schutte, Brian J. "Biology and ecology of Ambrosia Trifida L. seedling emergence." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1181937971.

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Lambton, P. A. "The photo-inhibition of seed germination and the induction of secondary dormancy." Thesis, University of Leicester, 1985. http://hdl.handle.net/2381/35323.

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A study of photoinhibition of seed germination and the induction of secondary dormancy has been made on weedy species that tend to produce large numbers of small, light-sensitive seeds. Both light-requiring (e.g., Chenopodium album) and light-inhibited (e.g., Amaranthus caudatus) species were used but nevertheless were found to show similar responses to high fluence irradiation, differences being largely ones of varying sensitivity. All species tested (except Digitalis purpurea) showed a marked inhibition of germination in continuous fluorescent white light supplemented with far-red compared t

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22

Geyer, Regina [Verfasser]. "Molecular and cytological analysis of seed dormancy in Arabidopsis thaliana / Regina Geyer." Köln : Universitäts- und Stadtbibliothek Köln, 2008. http://d-nb.info/1013792696/34.

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Aroonrungshikul, Chuanpis. "Physiological and Biochemical Studies on the Seed Dormancy of Local Thai Cucumber." Kyoto University, 2002. http://hdl.handle.net/2433/150373.

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Browning, Luke Wayne. "StCKP and potato tuber dormancy." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275074.

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Sautu, Adriana Elena. "ECOLOGY, MORPHOLOGY, AND GERMINATION PHYSIOLOGY OF TREE SEEDS IN A TROPICAL SEMIEVERGREEN FOREST IN THE PANAMA CANAL WATERSHED, WITH SPECIAL REFERENCE TO SEED DORMANCY CLASSES ALONG A PRECIPITATION GRADIENT." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_theses/206.

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The Panama Canal Watershed (PCW) represents a special opportunity for studies related to seed dormancy in the tropics with both applied and basic research objectives. There is a clear need for seed information for nursery planning in restoration projects that involves use of a large number of local species. Moreover, the strong rainfall gradient along the 60 km of continuous lowland forest in the PCW represents an excellent opportunity to understand dormancy and its role as an adaptive trait that evolved in response to environmental factors. This study presents useful seed information for 100

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Arc, Erwann. "Étude de l'implication des oxides d'azote dans le controle de la dormance des graines d'Arabidopsis thaliana." Thesis, Paris, AgroParisTech, 2013. http://www.theses.fr/2013AGPT0011.

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Omami, Elizabeth Nabwile, of Western Sydney Hawkesbury University, of Agriculture Horticulture and Social Ecology Faculty, and School of Horticulture. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants." THESIS_FAHSE_HOR_Omami_E.xml, 1993. http://handle.uws.edu.au:8081/1959.7/66.

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A large number of weed seeds in the soil persist because of seed dormancy, and depletion of the seed bank through manipulation of seed dormancy has been suggested as one of the goals in weed control. This study was designed to investigate some of the factors which control dormancy and germination in Amaranthus retroflexus seeds. Germination studies were conducted at different temperatures, and either in continuous white light or in the dark. Higher temperatures increased germination and, although light interacted with temperature, its effect on germination varied with the temperature. In an at

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28

Chen, Hua. "Seed dormancy of Pitcher's thistle, a threatened species of Lake Huron sand dunes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0009/MQ28548.pdf.

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Shepherd, Sophie. "Genotype and environment interactions of seed dormancy in wild oat (Avena fatua L.)." Thesis, University of Reading, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427855.

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Andriotis, Vasilios M. E. "Seed dormancy alleviation in Corylus avellana L. : phosphate pool and phosphate-mobilising enzymes." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250719.

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Bair, Necia B. "A hydrothermal after-ripening time model of seed dormancy loss in Bromus tectorum /." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd487.pdf.

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Omami, Elizabeth Nabwile. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants." Thesis, [S.l. : s.n.], 1993. http://handle.uws.edu.au:8081/1959.7/66.

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A large number of weed seeds in the soil persist because of seed dormancy, and depletion of the seed bank through manipulation of seed dormancy has been suggested as one of the goals in weed control. This study was designed to investigate some of the factors which control dormancy and germination in Amaranthus retroflexus seeds. Germination studies were conducted at different temperatures, and either in continuous white light or in the dark. Higher temperatures increased germination and, although light interacted with temperature, its effect on germination varied with the temperature. In an at

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Omami, Elizabeth Nabwile. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants /." [S.l. : s.n.], 1993. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030603.091907/index.html.

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Bair, Necia Beck. "A Hydrothermal After-ripening Time Model of Seed Dormancy Loss in Bromus tectorum." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/533.

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After-ripening, the process of seed dormancy loss in dry storage is associated with a decrease in the mean base water potential, one of the parameters of hydrothermal time. The rate of change of the mean base water potential is assumed to be a linear function of temperature above a specific base temperature and as a result can be described by a thermal after-ripening (TAR) time model, an extension of hydrothermal modelling. The thermal requirement for after-ripening is the thermal time necessary for the modelling base water potential of the seed to shift from its original value to its final va

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Russell, Laurel. "Isolation and analysis of mutants in Arabidopsis thaliana disrupted in the transition between dormancy and germination." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265420.

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Postma, Froukje M. "Selection during Early Life Stages and Local Adaptation in Arabidopsis thaliana." Doctoral thesis, Uppsala universitet, Växtekologi och evolution, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302862.

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Organisms are often adapted to their local environment, but the role of early life stages in adaptive differentiation among populations remains poorly known. The aim of my thesis was to investigate the contribution of early life stages to the magnitude and genetic basis of local adaptation, and to identify the underlying adaptive traits. For this, I used two natural populations of the annual plant Arabidopsis thaliana from Italy and Sweden, and a Recombinant Inbred Line (RIL) population derived from a cross between these populations. By combining greenhouse and field experiments, Quantitative

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Marty, James. "Revegetation of Bulrushes Bolboschoenus Maritimus, Schoenoplectus Acutus, and S. Americanus in Great Salt Lake Wetlands: Seed Biology and Influence of Environmental Factors on Rhizomes." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5066.

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A primary goal of ecological restoration is to establish desirable plant species. This goal is particularly important following the removal of invasive plants. Understanding biological traits of plant species important to revegetation is crucial to plant establishment. In the globally important Great Salt Lake (GSL) wetlands, native habitat-forming bulrushes Bolboschoenus maritimus, Schoenoplectus acutus, and S. americanus are frequently displaced by the invasive grass Phragmites australis. Successful revegetation of bulrushes relies on improving our understanding of seed dormancy break, seed

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Hamid, Shaikh Abdul. "Chemical and biochemical aspects of seed dormancy and recalcitrance in hazelnuts (Corylus Avellana L.)." Thesis, Teesside University, 2015. http://hdl.handle.net/10149/613551.

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Hazelnuts are mostly non-dormant at harvest but develop seed dormancy after a few days of storage. The seeds have been classified as recalcitrant since they cannot be stored for more than one year under ambient conditions. Cryopreservation has not been satisfactory so an alternative protocol is required. To test for recalcitrance, chilled non-dormant seeds (control) were compared with gibberellic acid (GA3) treated seeds during 6 weeks storage at 5°C or at ambient temperature. Control seed moisture content (MC) was 14-15% compared with 20% for GA3 treated seeds. No change in viability was note

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Soleimani, Mohammadreza. "The effect of rain and agronomy on seed dormancy and quality of winter cereals." Thesis, University of Reading, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.739381.

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Variation in agronomy and crop production environment often have interactive effects on cereal seed dormancy and seed and grain quality, possibly by effects on canopy temperature, seed size, or grain drying rate. The effect of rain, nitrogen (N) fertilizer, and fungicide on seed dormancy, grain quality and subsequent seedling growth of winter cereals was studied in three field experiments. Dormancy was released during seed development and maturation in barley, rye and triticale (2012) but released and then re-imposed in wheat (2012 and 2013). Dormancy release was stimulated in barley, rye and

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PICCIAU, ROSANGELA. "Seed dormancy and germination niches of Mediterranean species along an altitudinal gradient in Sardinia." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266731.

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The most crucial environmental factor for the failure of seedling emergence / establishment is temperature stress; consequently, seed germination should be triggered by favourable temperature conditions for the further development of the seedling. Therefore, temperature is the primary environmental factor regulating germination, and it is also considered responsible for changes in dormancy states of seeds. Seed dormancy has probably evolved differently across species, through adaptation to various habitats and prevailing environments. Under a Mediterranean climate, characterised by a consider

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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<br>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 Quia

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Contreras, Samuel A. "Effects of maternal plant invironment on lettuce (lactuca sativa l.) seed dormancy, germinability, and storability." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1196451272.

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Esser, Andrew Ross. "Maternal environmental factors influencing kochia (Kochia scoparia) seed characteristics." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/17750.

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Master of Science<br>Department of Agronomy<br>Anita Dille<br>A better understanding of kochia (Kochia scoparia) seed characteristics is necessary for long term management of this increasingly troublesome weed. The objectives were to evaluate maternal environmental factors influencing kochia seed produced in the field and to document variability in dormancy and seed viability produced within a single kochia plant grown in the greenhouse or field. Field experiments were conducted in 2012 and 2013 at the Kansas State Agricultural Research Center in Hays. Two different kochia biotypes from Hay

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Tilini, Kassie Lorraine. "The Seed Ecology of Rare and Endangered Gibbens' Beardtongue (Penstemon gibbensii) and Blowout Penstemon (Penstemon haydenii)." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4065.

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Penstemon gibbensii and Penstemon haydenii are two rare, perennial forbs inhabiting remote areas of the western United States. P. gibbensii is listed as a sensitive species by the Bureau of Land Management (BLM) in Colorado, Utah, and Wyoming (Heidel, 2009). P. haydenii was designated as Endangered by the U.S. Fish and Wildlife Service in 1987 (Heidel, 2012). This thesis research was geared toward helping land managers in their efforts to protect and rehabilitate these species by providing understanding on different aspects of their seed ecology. My first study was a laboratory experiment perf

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Galindo, Carlos Afonso Magalhães [UNESP]. "Absorção de água, germinação e dormência de sementes de mucuna preta." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/96798.

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Made available in DSpace on 2014-06-11T19:28:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-05-29Bitstream added on 2014-06-13T19:57:56Z : No. of bitstreams: 1 galindo_cam_me_jabo.pdf: 862767 bytes, checksum: af26a620af6aa1461436f3ff8272fde7 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Com o objetivo de estudar a dormência tegumentar e caracterizar possíveis relações entre tamanho e qualidade fisiológica e permeabilidade dos tegumentos, qualidade fisiológica e permeabilidade

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Tilsner, Heidy Rose. "Studies on the induction and release of seed dormancy in wild oats (Avena fatua L.)." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26092.

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The induction and release of secondary dormancy by anaerobiosis in genetically pure dormant (AN-51, Mont 73) and nondormant (CS-40, SH-430) lines of Avena fatua L. and the role of alternative respiration in the regulation of its primary and secondary dormancy were studied. These lines differed with regard to the optimal period of anaerobiosis necessary for induction of dormancy and/or the degree (% of seeds acquiring dormancy) and duration of dormancy induced. Secondary dormancy could be induced more effectively in after-ripened seeds of dormant lines than in nondormant lines where only a shor

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Contreras, Samuel A. "Effects of maternal plant environment on lettuce (Lactuca sativa L.) seed dormancy, germinability, and storability." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196451272.

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Carmona, Ricardo. "Factors affecting the efficacy of dormancy-relieving chemicals on weed seed banks in the soil." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316108.

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Correa-Morales, Ana Maria. "Unraveling the Genetics of Seed Dormancy in Barley Using Genome-Wide Association and Biparental Mapping." Diss., North Dakota State University, 2013. https://hdl.handle.net/10365/27232.

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Seed dormancy is the delay or inability of viable seeds to germinate under favorable conditions. The differential expression of dormancy levels in barley (Hordeum vulgare L.) seeds impacts malt quality. While dormant genotypes are required to avoid the incidence of preharvest-sprouting, genotypes with low dormancy are needed for uniform germination of seeds during malting. The objective of this study was to determine the genetic basis underlying seed dormancy in spring barley using genome-wide association mapping (AM) and linkage mapping. A panel of 3,072 elite U.S. spring barley breeding line

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Taab, Alireza. "Seed dormancy and germination in Solanum nigrum and S. physalifolium as influenced by temperature conditions /." Uppsala : Dept. of Crop Production Ecology, Swedish University of Agricultural Sciences, 2009. http://epsilon.slu.se/200949.pdf.

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