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
Temperature regulation of plant phenological development
TL;DR: The overall aim is to connect the knowledge gained with thermal perception and the signaling that drives plant responses, with major focus on the latter.
Journal ArticleDOI
1-Aminocyclopropane-1-carboxylic acid and abscisic acid during the germination of sugar beet (Beta vulgaris L.): a comparative study of fruits and seeds
Katrin Hermann,Juliane Meinhard,Peter Dobrev,Ada Linkies,Bedrich Pesek,Barbara Hess,Ivana Macháčková,Uwe Fischer,Gerhard Leubner-Metzger +8 more
TL;DR: Quantification of the endogenous A BA and ACC contents, ABA and ACC leaching, and ethylene evolution, demonstrate that an embryo-mediated active ABA extrusion system is involved in keeping the endogenous seed ABA content low by 'active ABA leaching', while the pericarp restricts ACCLeaching during imbibition.
Journal ArticleDOI
Seed germination at different temperatures and water stress levels, and seedling emergence from different depths of Ziziphus lotus
M. Maraghni,M. Gorai,M. Neffati +2 more
TL;DR: Germination was inhibited by either an increase or decrease in temperature from the most suitable temperature found (35 °C), and increasing moisture stress progressively inhibited seed germination, and the highest germination percentages were obtained under control conditions without PEG.
Journal ArticleDOI
A transient decrease in reactive oxygen species in roots leads to root hair deformation in the legume-rhizobia symbiosis.
TL;DR: A role for the transient reduction of ROS accumulation is suggested in governing NF-induced root hair deformation in legumes and in the nonlegumes Arabidopsis thaliana and tomato.
Journal ArticleDOI
The importance of safeguarding genome integrity in germination and seed longevity
TL;DR: Recent studies identified that maintenance of genome integrity is particularly important to the seed stage of the plant lifecycle, revealing new insight into the physiological roles of plant DNA repair and recombination mechanisms.
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.