نتایج جستجو برای: genetic and seed dormancy

تعداد نتایج: 16908691  

2017
Envel Kerdaffrec Magnus Nordborg

Seed dormancy is a complex adaptive trait that controls the timing of seed germination, one of the major fitness components in many plant species. Despite being highly heritable, seed dormancy is extremely plastic and influenced by a wide range of environmental cues. Here, using a set of 92 Arabidopsis thaliana lines from Sweden, we investigate the effect of seed maturation temperature on dorma...

2008
Laila M. Karlsson Per Milberg

In an ecological context, knowledge of intra-species variation in dormancy and germination is necessary both for practical and theoretical reasons. We used four or five seed batches (replicates) of four closely related annuals co-occurring in arable fields in Sweden: Lamium amplexicaule, L. confertum, L. hybridum and L. purpureum. Seeds used for experiments stemmed from plants cultivated on two...

2013
Aihua Liu Feng Gao Yuri Kanno Mark C. Jordan Yuji Kamiya Mitsunori Seo Belay T. Ayele

Treatments that promote dormancy release are often correlated with changes in seed hormone content and/or sensitivity. To understand the molecular mechanisms underlying the role of after-ripening (seed dry storage) in triggering hormone related changes and dormancy decay in wheat (Triticum aestivum), temporal expression patterns of genes related to abscisic acid (ABA), gibberellin (GA), jasmona...

Journal: :پژوهش های زراعی ایران 0
اسماعیل رضائی چیانه مهدی تاج بخش اروج ولیزادگان فرزاد بنائی اصل حسن مهدوی کیا

henbane hyoscyamus reticulatus l. is a plant species in solanaceae family that seeds hardly germinate because of seed dormancy. in order to determine the best methods for seed dormancy breaking in henbane, a experiment was conducted as a completely randomized design with three replications. the treatments included moist pre-chilling (at 4 °c) for 7, 14, 21 and 28 days, combined treatment of gib...

2002
J. Derek

Seeds are a vital component of the world’s diet. Cereal grains alone, which comprise -90% of all cultivated seeds, contribute up to half of the global per capita energy intake. Not surprisingly then, seed biology is one of the most extensively researched areas in plant physiology. Even in relation to the topics reviewed here, a casual perusal of the Agricola database reveals that well over 5000...

Journal: :Annals of botany 2009
Jana Kochánková Bohumil Mandák

BACKGROUND AND AIMS The heterocarpic species Atriplex tatarica produces two types of seeds. In this study, how basic population genetic parameters correlate with seed germinability under various experimental conditions was tested. METHODS Population genetic diversity was ascertained in eight populations of A. tatarica by assessing patterns of variation at nine allozyme loci. Germinability of ...

2003
Gerhard Leubner-Metzger

-1,3-Glucanase ( Glu) expression in seeds plays important roles in the regulation of seed germination, dormancy and in the defence against seed pathogens. A thick -1,3-glucan layer is typical for the seed envelope of cucurbitaceous species, confers seed semipermeability and is degraded during germination. In many species with coat-imposed dormancy, the seed envelope confers a physical constrain...

Journal: :The Plant cell 2011
Shingo Nakamura Fumitaka Abe Hiroyuki Kawahigashi Kou Nakazono Akemi Tagiri Takashi Matsumoto Shigeko Utsugi Taiichi Ogawa Hirokazu Handa Hiroki Ishida Masahiko Mori Kanako Kawaura Yasunari Ogihara Hideho Miura

Seed dormancy is an adaptive mechanism and an important agronomic trait. Temperature during seed development strongly affects seed dormancy in wheat (Triticum aestivum) with lower temperatures producing higher levels of seed dormancy. To identify genes important for seed dormancy, we used a wheat microarray to analyze gene expression in embryos from mature seeds grown at lower and higher temper...

Journal: :Seed Science Research 1997

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