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.
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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+.
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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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The BME3 (Blue Micropylar End 3) GATA zinc finger transcription factor is a positive regulator of Arabidopsis seed germination
TL;DR: In this article, the authors show that the GATA zinc finger protein expressed in Arabidopsis seeds during cold stratification plays a critical role in germination, and that the normal GA signal transduction pathway is present in the knockout mutants.
Book
Seed Quality: Basic Mechanisms and Agricultural Implications
TL;DR: Methods of Viability and Vigor Testing: A Critical Appraisal and the impact of Seed Quality on Crop Establishment, Growth, and Yield are described.
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The role of the seed-coats in germination of photosensitive lettuce seeds
Hiroshi Ikuma,Kenneth V. Thimann +1 more
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Brassinosteroids and gibberellins promote tobacco seed germination by distinct pathways.
TL;DR: It is proposed that BRs promote seed germination by directly enhancing the growth potential of the emerging embryo in a GA- and βGLU I-independent manner.
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Control of Seed Germination by Abscisic Acid : II. Effect on Embryo Water Uptake in Brassica napus L.
Peter Schopfer,Claudia Plachy +1 more
TL;DR: In a two-factor analysis of the simultaneous action of ABA and osmoticum on germination, a complete synergistic interaction between these factors was found while A BA and cycloheximide exhibit independent (multiplicative) coaction.