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
A cytochrome P450, OsDSS1, is involved in growth and drought stress responses in rice (Oryza sativa L.)
Muluneh Tamiru,Jerwin R. Undan,Hiroki Takagi,Akira Abe,Kakoto Yoshida,Jesusa Q. Undan,Satoshi Natsume,Aiko Uemura,Hiromasa Saitoh,Hideo Matsumura,Naoya Urasaki,Takao Yokota,Ryohei Terauchi +12 more
TL;DR: It is suggested that DSS1 mediates growth and stress responses in rice by fine-tuning GA-to-ABA balance, and might as well play a role in lipid metabolism.
Journal ArticleDOI
Primary seed dormancy: a temporally multilayered riddle waiting to be unlocked.
TL;DR: This work attempts to identify and summarize what is known about the molecular and genetic mechanisms intervening over time in each of the principal developmental stages where primary dormancy is established and regulated before and during seed after‐ripening, where it is progressively lost.
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Elucidating hormonal/ROS networks during seed germination: insights and perspectives
TL;DR: This review is an attempt to summarize the new discoveries involving ROS and seed germination, involving mitogen-activated protein kinase cascade activation, gene expression and post-translational protein modifications.
Journal ArticleDOI
Global biogeography of seed dormancy is determined by seasonality and seed size: a case study in the legumes.
Rafael Rubio de Casas,Rafael Rubio de Casas,Rafael Rubio de Casas,Charles G. Willis,William D. Pearse,Carol C. Baskin,Jerry M. Baskin,Jeannine Cavender-Bares +7 more
TL;DR: It is predicted that, within a given lineage, taxa producing larger, nondormant seeds will necessarily predominate in aseasonal environments, while plants bearing small, dormant seeds will be dominant under short growing seasons.
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Germination traits explain soil seed persistence across species: the case of Mediterranean annual plants in cereal fields
TL;DR: The results underline the functional role of delayed germination and light for survival of seeds in the soil and hence their importance for shaping the first part of the seed decay curve.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.