Seed dormancy and the control of germination
TLDR
It is argued that adaptation has taken place on a theme rather than via fundamentally different paths and similarities underlying the extensive diversity in the dormancy response to the environment that controls germination are identified.Abstract:
Seed dormancy is an innate seed property that defines the environmental conditions in which the seed is able to germinate. It is determined by genetics with a substantial environmental influence which is mediated, at least in part, by the plant hormones abscisic acid and gibberellins. Not only is the dormancy status influenced by the seed maturation environment, it is also continuously changing with time following shedding in a manner determined by the ambient environment. As dormancy is present throughout the higher plants in all major climatic regions, adaptation has resulted in divergent responses to the environment. Through this adaptation, germination is timed to avoid unfavourable weather for subsequent plant establishment and reproductive growth. In this review, we present an integrated view of the evolution, molecular genetics, physiology, biochemistry, ecology and modelling of seed dormancy mechanisms and their control of germination. We argue that adaptation has taken place on a theme rather than via fundamentally different paths and identify similarities underlying the extensive diversity in the dormancy response to the environment that controls germination.read more
Citations
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Journal ArticleDOI
Seed dormancy and longevity in subarctic and alpine populations of Silene suecica
Andrea Mondoni,Simone Orsenigo,Jonas V. Müller,Ulla Carlsson-Granér,Borja Jiménez-Alfaro,Thomas Abeli +5 more
TL;DR: Germination and dormancy were driven by an interplay of geographical and climatic factors, with alpine and warm versus subarctic and cool autumn conditions, eliciting a decrease and an increase of emergence, respectively.
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Germination studies on three critically endangered endemic angiosperm species of the Kashmir Himalaya, India
TL;DR: Investigation of the effect of chilling and exogenous application of growth hormones, NO3− and NH4+ on total percent germination of otherwise deep-dormant seeds of these species, under alternate light/dark and continuous dark light regimes found prolonged chilling of seeds followed by their treatment with GA3 under alternateLight/dark conditions are the requirements necessary for seed germination in these species.
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Transcriptional Differences in Peanut (Arachis hypogaea L.) Seeds at the Freshly Harvested, After-ripening and Newly Germinated Seed Stages: Insights into the Regulatory Networks of Seed Dormancy Release and Germination
Pingli Xu,Guiying Tang,Weipei Cui,Guangxia Chen,Changle Ma,Jieqiong Zhu,Pengxiang Li,Lei Shan,Liu Zhanji,Shubo Wan +9 more
TL;DR: It was suggested that the coordination of multiple hormone signal transduction nets plays a key role in radicle protrusion and seed germination in peanut.
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Differential effects of sodium chloride on germination and post-germination stages of two tomato genotypes
TL;DR: In this article, the effect of different sodium chloride (NaCl) concentrations-containing medium (0, 25, 50 and 100mM NaCl) on germination rate of two Italian tomato genotypes (Ciettaicale and San Marzano) was evaluated.
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Temperature and water stress during conditioning and incubation phase affecting Orobanche crenata seed germination and radicle growth
TL;DR: Temperature, water potential and type of water stress on seed germination were similar, although the radicle growth of seeds under osmotic stress was lower than under matric stress, what could explain the lowest infestation of Orobanche sp.
References
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Seeds. Ecology, Biogeography, and, Evolution of Dormancy and Germination 2nd ed
Carol C. Baskin,Jerry M. Baskin +1 more
Book
Seeds: Ecology, Biogeography, and, Evolution of Dormancy and Germination
Carol C. Baskin,Jerry M. Baskin +1 more
TL;DR: A Geographical Perspective on Germination Ecology: Tropical and Sub-tropical Zones as discussed by the authors, Temperate and Arctic Zones, and Semi-Arctic Zones: Temperate, Subtropical, and Arctic zones.
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Seeds: Physiology of Development and Germination.
Book
Seeds: Physiology of Development and Germination
J. D. Bewley,Michael Black +1 more
TL;DR: Seeds: Germination, Structure, and Composition; Development-Regulation and Maturation; Mobilization of Stored Seed Reserves; and some Ecophysiological Aspects.
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Seed Germination and Dormancy.
TL;DR: This review provides both an overview of the essential processes that are associated with germination and a description of the possible impediments thereto that may result in dormancy.