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
Evaluation of variability to drought and saline stress through the germination of different ecotypes of carob (Ceratonia siliqua L.) using a hydrotime model
Valeria Cavallaro,Antonio C. Barbera,Carmelo Maucieri,Carmelo Maucieri,Greta Gimma,Clara Scalisi,Cristina Patanè +6 more
TL;DR: A protocol to test germination under simulated stress conditions (drought and salinity stress) was established and a greater sensitivity to stress was determined during early radicle growth, an essential feature for early plant establishment in marginal dry areas.
Journal ArticleDOI
Local climate explains degree of seed dormancy in Hypericum elodes L. (Hypericaceae).
TL;DR: It is suggested that seed maturation environment may play a substantial role in explaining the degree of dormancy in H. elodes, highlighting that physiological dormancy can be modulated by local climate.
Journal ArticleDOI
Tissue-specific hormonal profiling during dormancy release in macaw palm seeds
TL;DR: Hormones play a crucial tissue-specific role in the control of dormancy, germination and initial development of seedlings in macaw palm, including a central role not only for GAs and ABA, but also for CKs and other hormones.
Journal ArticleDOI
Seed structure and germination in buriti (Mauritia flexuosa), the Swamp palm
Renata Santana Silva,Leonardo Monteiro Ribeiro,Maria Olívia Mercadante-Simões,Yule Roberta Ferreira Nunes,Paulo Sérgio Nascimento Lopes +4 more
TL;DR: The structures and physiological aspects of the seeds and seedlings of this species are described to examine its adaptations to swampy environments and its germination control mechanisms, as well as the relationship between recalcitrance and dormancy in terms of reproductive success.
Journal ArticleDOI
Germination requirements and seed mass of slow- and fast-colonizing temperate forest herbs along a latitudinal gradient
Bente J. Graae,Kris Verheyen,Annette Kolb,Sebastian van der Veken,Thilo Heinken,Olivier Chabrerie,Martin Diekmann,Karin Valtinat,Renate Zindel,Elisabeth Karlsson,Lotta Ström,Guillaume Decocq,Martin Hermy,Carol C. Baskin +13 more
TL;DR: It is hypothesized that warmer temperatures during the early Holocene yielded higher seed quality, contributing to explaining the fast migration of many plant species that are poor colonizers today.
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.