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
The ecophysiology of seed persistence: a mechanistic view of the journey to germination or demise
Rowena L. Long,Marta J. Gorecki,Michael Renton,Michael Renton,John K. Scott,John K. Scott,Louise Colville,Danica E. Goggin,Lucy Commander,David A. Westcott,Hillary Cherry,William E. Finch-Savage +11 more
TL;DR: By synthesising knowledge of how the environment affects seeds to determine when and how they leave the soil seed bank into a resistance–exposure model, this work provides a new framework for developing experimental and modelling approaches to predict how long seeds will persist in a range of environments.
Journal ArticleDOI
Polycomb repressive complex 2 controls the embryo-to-seedling phase transition.
Daniel Bouyer,François Roudier,Maren Heese,Ellen Dehnes Andersen,Delphine Gey,Moritz K. Nowack,Justin Goodrich,Jean-Pierre Renou,Paul E. Grini,Vincent Colot,Arp Schnittger +10 more
TL;DR: The results show that fie mutant seeds exhibit enhanced dormancy and germination defects, indicating a deficiency in terminating the embryonic phase, and demonstrate that PRC2-mediated regulation represents a robust system controlling developmental phase transitions, not only from vegetative phase to flowering but also especially from embryonic phase to the seedling stage.
Journal ArticleDOI
Combined networks regulating seed maturation.
Laurent Gutierrez,Olivier Van Wuytswinkel,Mathieu Castelain,Catherine Bellini,Catherine Bellini +4 more
TL;DR: Seed maturation is an important phase of seed development during which embryo growth ceases, storage products accumulate, the protective tegument differentiates and tolerance to desiccation develops, leading to seed dormancy.
Journal ArticleDOI
Legume nodule senescence: roles for redox and hormone signalling in the orchestration of the natural aging process.
Alain Puppo,Karin Groten,Karin Groten,Fabiola Bastian,Raffaella Carzaniga,Mariam Soussi,M. Mercedes Lucas,María Rosario de Felipe,Judith Harrison,Hélène Vanacker,Christine H. Foyer +10 more
TL;DR: This work proposes models by which ROS and antioxidants interact with hormones such as abscisic acid in the orchestration of nodule senescence and suggests that this interaction does not necessarily lead to enhanced ROS or oxidative stress.
Journal ArticleDOI
Evaluation of developmental responses of two crop plants exposed to silver and zinc oxide nanoparticles
Lok R. Pokhrel,Brajesh Dubey +1 more
TL;DR: These findings highlight previously overlooked, anatomically significant effects of metal nanoparticles, and recommend considering detailed anatomical investigations in tandem with the standard developmental phytotoxicity assays (germination and root elongation) as the latter ones appear less sensitive for screening plant responses to nanomaterial insults.
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.