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 AtTudor2, a protein with SN-Tudor domains, is involved in control of seed germination in Arabidopsis.
TL;DR: The results suggest that AtTudor2 is involved in GA biosynthesis and seed germination of Arabidopsis, and the expression of a key enzyme forGA biosynthesis, AtGA20ox3, was downregulated obviously in AtTUDor2 T-DNA insertion mutant and At tudor1/AtTudOr2 RNAi transgenic lines.
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Effect of Electromagnetic Stimulation of Amaranth Seeds of Different Initial Moisture on the Germination Parameters and Photosynthetic Pigments Content
Krzysztof Kornarzyński,Agata Dziwulska-Hunek,Agnieszka Kornarzyńska-Gregorowicz,Agnieszka Sujak +3 more
TL;DR: The three stages of the water uptake associated with the seed germination process coincide with the maximum values in the germination parameters and with the change in the photosynthetic pigment content in seedlings.
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Pericarp anatomy and hormone profiles of cypselas in dormant and non-dormant inbred sunflower lines.
Andrea Andrade,Natalí Vanesa Riera,Lilia Ivone Lindström,Sergio Alemano,Daniel Alvarez,Guillermina Abdala,Ana Vigliocco +6 more
TL;DR: The findings indicate that pericarp hormone profiles are affected in the two lines with different dormancy degree depending on storage conditions and imbibition processes.
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Nymphaeaceae : a basal angiosperm family (ANITA grade) with a fully developed embryo
Carol C. Baskin,Jerry M. Baskin +1 more
TL;DR: If Amborella and Nymphaeales are equally the most basal angiosperms, as some molecular phylogenetic studies indicate, then it must conclude that the broad and rudimentary embryos are equally primitive.
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A Perspective on Secondary Seed Dormancy in Arabidopsis thaliana
TL;DR: An overview is provided of the current knowledge on secondary dormancy focusing on A. thaliana, and a working model describingsecondary dormancy is proposed, focusing on the interaction of primary and secondary dormancies.
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.