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
Desiccation Tolerance as the Basis of Long-Term Seed Viability
Galina Smolikova,Tatiana Leonova,Natalia Vashurina,Andrej Frolov,Andrej Frolov,Sergei Medvedev +5 more
TL;DR: The main regulators of maturation and desiccation tolerance onset are abscisic acid and protein DOG1, which control the network of transcription factors, and this network is complemented by epigenetic regulation of gene expression by methylation of DNA, post-translational modifications of histones and chromatin remodeling impact on seed desICcation tolerance and longevity.
Journal ArticleDOI
Climate and rapid local adaptation as drivers of germination and seed bank dynamics of Alliaria petiolata (garlic mustard) in North America
TL;DR: After 150 years of residence time in North America, Alliaria petiolata populations have developed striking differences in their responses to local climates and stratification requirements suggesting that a complex interplay of pre-adaptation, rapid evolutionary changes, and phenotypic plasticity result in locally adapted populations.
Journal ArticleDOI
Variation within species and inter-species comparison of seed dormancy and germination of four annual Lamium species
Laila M. Karlsson,Per Milberg +1 more
TL;DR: It is hypothesised that local adaptations occur through changes mainly in dormancy strength, i.e. how much effort is needed to reduce dormancy in Sweden, and thus reduces the risk of winter mortality, in Sweden.
Journal ArticleDOI
Identification of growth insensitive to ABA3 (gia3), a recessive mutation affecting ABA Signaling for the control of early post-germination growth in Arabidopsis thaliana.
Natsuko Kinoshita,Alexandre Berr,Christophe Belin,Richard Chappuis,Naoko K. Nishizawa,Luis Lopez-Molina +5 more
TL;DR: The gia3 locus identifies an additional arm of ABA signaling, distinct from that controlled by ABI5, which recruits MEE26 expression and maintains cotyledon embryonic identity, and also controls ABA-dependent gene expression responses that partially overlap with those controlled byABI5.
Journal ArticleDOI
Germination sensitivity to water stress in four shrubby species across the Mediterranean Basin.
Daniel Chamorro,Belén Luna,Jean-Marc Ourcival,Ali Kavgaci,Costantino Sirca,Costantino Sirca,Florent Mouillot,Margarita Arianoutsou,José M. Moreno +8 more
TL;DR: Four species studied differed in germination sensitivity to water stress; furthermore, fire cues increased this sensitivity in the three hard-seeded species, but not in E. arborea, while populations within species consistently differed among themselves, but these differences could only be related to the provenance locality.
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.