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
Natural variation for seed dormancy in Arabidopsis is regulated by additive genetic and molecular pathways
Leónie Bentsink,Johannes Hanson,C. J. Hanhart,Hetty Blankestijn-de Vries,Colin Coltrane,Paul Keizer,Mohamed E. El-Lithy,Carlos Alonso-Blanco,M. Teresa de Andrés,Matthieu Reymond,Fred A. van Eeuwijk,Sjef Smeekens,Maarten Koornneef +12 more
TL;DR: It is proposed that natural variation for seed dormancy in Arabidopsis is mainly controlled by different additive genetic and molecular pathways rather than epistatic interactions, indicating the involvement of several independent pathways.
Journal ArticleDOI
Mutations of genes in synthesis of the carotenoid precursors of ABA lead to pre-harvest sprouting and photo-oxidation in rice
Jun Fang,Chenglin Chai,Qian Qian,Chunlai Li,Jiuyou Tang,Lei Sun,Zejun Huang,Xiaoli Guo,Changhui Sun,Min Liu,Yan Zhang,Qingtao Lu,Yiqin Wang,Congming Lu,Bin Han,Fan Chen,Zhukuan Cheng,Chengcai Chu +17 more
TL;DR: The results suggest that the impairment of carotenoid biosynthesis causes photo-oxidation and ABA-deficiency phenotypes, of which the latter is a major factor controlling the PHS trait in rice.
Journal ArticleDOI
Effect of Cold Plasma Treatment on Seed Germination and Growth of Wheat
TL;DR: In this article, the effect of cold helium plasma treatment on seed germination, growth and yield of wheat was investigated, and the effects of different power of cold plasma on the germination of treated wheat seeds were studied.
Journal ArticleDOI
Maize root growth angles become steeper under low N conditions
TL;DR: It is postulate that modulation of rooting depth by root growth angles is important for nitrogen acquisition by positioning roots in soil domains with the greatest nitrogen availability by positioning genotypes constitutively forming steep root angles.
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Production of reactive oxygen species and reactive nitrogen species by angiosperm stigmas and pollen: potential signalling crosstalk?
TL;DR: Constitutive accumulation of ROS/H2O2 appears to be a feature of angiosperm stigmas, a novel finding discussed in terms of a possible role for stigmatic ROS/O2 and pollen-derived NO in pollen-stigma interactions and defence.
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.