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
Biomechanical, biochemical, and morphological mechanisms of heat shock-mediated germination in Carica papaya seed
Rachel E. Webster,Wanda M. Waterworth,Wolfgang Stuppy,Christopher E. West,Roland Ennos,Clifford M. Bray,Hugh W. Pritchard +6 more
TL;DR: Dormant Carica papaya seeds germinate rapidly after a single heat shock, following seed coat weakening that requires de novo protein synthesis but is unaffected by the germination antagonist abscisic acid.
EVALUATION AND ENHANCEMENT OF SEED LOT QUALITY IN EASTERN GAMAGRASS [ Tripsacum dactyloides (L.) L.]
TL;DR: The next generation of teachers will have to think differently about how to teach and how to promote positive emotions towards the process.
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Redox feedback regulation of ANAC089 signaling alters seed germination and stress response.
Pablo Albertos,Kiyoshi Tatematsu,Isabel Mateos,Inmaculada Sánchez-Vicente,Alejandro Fernández-Arbaizar,Kazumi Nakabayashi,Eiji Nambara,Marta Godoy,José M. Franco,Roberto Solano,Davide Gerna,Thomas Roach,Wolfgang Stöggl,Ilse Kranner,Carlos Perea-Resa,Julio Salinas,Oscar Lorenzo +16 more
TL;DR: In this paper, the authors show that GAP1 (germination in ABA and cPTIO 1) encodes the transcription factor ANAC089 with a critical membrane-bound domain and extranuclear localization.
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Re-induction of the cell cycle in the Arabidopsis post-embryonic root meristem is ABA-insensitive, GA-dependent and repressed by KRP6
TL;DR: Two conflicting phenotypes suggest the cell cycle uncouples GA and ABA responses in germinating Arabidopsis seeds, and that KRP6 acts downstream of GA to inhibit mitotic cell cycle activation during germination.
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A clade in the QUASIMODO2 family evolved with vascular plants and supports a role for cell wall composition in adaptation to environmental changes.
TL;DR: The results suggest that the QUA2-specific clade contributed to the evolution of vasculature and illustrate the important role that modification of cell wall composition plays in the adaptation to changing environmental conditions, including changes in temperature.
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.