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
Molecular Aspects of Seed Dormancy
TL;DR: The net result is a slightly heterogeneous response, thereby providing more temporal options for successful germination.
Journal ArticleDOI
Molecular networks regulating Arabidopsis seed maturation, after-ripening, dormancy and germination
TL;DR: Current knowledge of the molecular control of this trait in Arabidopsis thaliana is presented, focussing on important components functioning during the developmental phases of seed maturation, after-ripening and imbibition.
Journal ArticleDOI
From intracellular signaling networks to cell death: the dual role of reactive oxygen species in seed physiology.
TL;DR: The concept of the "oxidative window for germination" as mentioned in this paper restricts the occurrence of the cellular events associated with germination to a critical range of reactive oxygen species (ROS) level, enclosed by lower and higher limits.
Journal ArticleDOI
Shaping the calcium signature.
Martin R. McAinsh,Jon K. Pittman +1 more
TL;DR: Evidence is reviewed which indicates that Ca2+ channel, Ca2-ATPase andCa2+ exchanger isoforms can indeed modulate specific Ca2+.
Journal ArticleDOI
First off the mark: early seed germination
TL;DR: An integrated view on the early phase of seed germination is provided and it is shown that it is characterized by dynamic biomechanical changes together with very early alterations in transcript, protein, and hormone levels that set the stage for the later events.
References
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Journal ArticleDOI
Mechanical Resistance of the Seed Coat and Endosperm during Germination of Capsicum annuum at Low Temperature
TL;DR: Application of gibberellic acid (4+7) (100 microliters per liter) resulted in earlier germination at 15degree C and 25 degrees C and decreased endosperm strength sooner than in untreated seeds and high O(2) concentrations had similar effects on germination earliness and endos sperm strength decline.
Book ChapterDOI
Review on dormancy, germinability and germination in crop and weed seeds.
Journal ArticleDOI
The second step of the biphasic endosperm cap weakening that mediates tomato (Lycopersicon esculentum) seed germination is under control of ABA
TL;DR: It was concluded that (a) endosperm cap weakening is a biphasic process and (b) inhibition of germination by ABA is through the second step in the endos sperm cap weakening process.
Journal ArticleDOI
Gibberellins and seed development in maize. II. Gibberellin synthesis inhibition enhances abscisic acid signaling in cultured embryos.
Constance White,Carol J. Rivin +1 more
TL;DR: It is suggested that GA antagonizes ABA signaling in developing maize embryos, and that the changing hormone balance provides temporal control over the maturation phase.
Journal ArticleDOI
A hydrothermal time model of seed after-ripening in Bromus tectorum L.
TL;DR: In this article, the authors proposed a model for after-ripening of B. tectorum seeds based on the concept of hydrothermal time, which was fitted using a repeated probit regression method, and for the two seed populations studied gave R2 values of 0.98 and 0.829.