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
More filters
Journal ArticleDOI
Developmental Control and Plasticity of Fruit and Seed Dimorphism in Aethionema arabicum.
Teresa Lenser,Kai Graeber,Ozge Cevik,Nezaket Adigüzel,Ali A. Dönmez,Christopher Grosche,Marcel Kettermann,Sara Mayland-Quellhorst,Zsuzsanna Mérai,Setareh Mohammadin,Thu-Phuong Nguyen,Florian Rümpler,Christina Schulze,Katja Sperber,Tina Steinbrecher,Nils Wiegand,Miroslav Strnad,Ortrun Mittelsten Scheid,Stefan A. Rensing,M.E. Schranz,Günter Theißen,Klaus Mummenhoff,Gerhard Leubner-Metzger,Gerhard Leubner-Metzger +23 more
TL;DR: The results indicate that heteromorphism evolved twice within the Aethionemeae, including once for the monophyletic annual AETHionema clade, and appears to be a blend of bet hedging and plasticity.
Journal ArticleDOI
MPK6 controls H2O2‐induced root elongation by mediating Ca2+ influx across the plasma membrane of root cells in Arabidopsis seedlings
TL;DR: Molecular and biochemical evidence showed that increased expression of the cell wall peroxidase PRX34 in Atmpk6 root cells enhanced apoplastic H2 O2 generation and promoted a cytosolic Ca(2+) increase and Ca( 2+) influx across the plasma membrane.
Journal ArticleDOI
Variability in seeds: biological, ecological, and agricultural implications.
TL;DR: It is suggested that by understanding the basis and underlying mechanisms of variability in seeds, strategies to increase seed population uniformity can be developed, leading to enhanced agricultural production across variable climatic conditions.
Journal ArticleDOI
Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana.
Alejandra Martínez-Berdeja,Michelle C. Stitzer,Mark A. Taylor,Miki Okada,Exequiel Ezcurra,Daniel E. Runcie,Johanna Schmitt +6 more
TL;DR: Genetic variation in seed dormancy responses to cold across the geographic range of a widespread annual plant provided evidence that A. thaliana’s germination niche and correlated life-history syndromes are shaped by past climate cycles, as well as local adaptation to contemporary climate.
Journal ArticleDOI
A class II KNOX gene, KNOX4, controls seed physical dormancy
Maofeng Chai,Chuanen Zhou,Isabel Molina,Chunxiang Fu,Jin Nakashima,Guifen Li,Wen-Zheng Zhang,Jong-Jin Park,Yuhong Tang,Qingzhen Jiang,Zeng-Yu Wang +10 more
TL;DR: Genetic and molecular analyses revealed that a class II KNOTTED-like homeobox (KNOX) gene, KNOX4, controls physical dormancy by regulating seed-coat cuticle development and elucidated a novel molecular mechanism ofPhysical dormancy and revealed a new role ofclass II KNOx genes.
References
More filters
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.