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
Sequential temperature control of multi-phasic dormancy release and germination of Paeonia corsica seeds
Journal ArticleDOI
Effects of NaCl stress on seed germination and seedling development of Brassica insularis Moris (Brassicaceae)
Andrea Santo,Efisio Mattana,Luca Frigau,A. Marzo Pastor,M. C. Picher Morellò,Gianluigi Bacchetta +5 more
TL;DR: Investigation of two natural factors, soil salinity and marine aerosols, widely present in the B. insularis habitat, provided the first insights into ecology of this protected species and its distribution in the Mediterranean and might be useful in understanding the actual distributions of other species with the same ecology that experience these same abiotic parameters.
Journal ArticleDOI
Role of thioproline on seed germination: interaction ROS-ABA and effects on antioxidative metabolism.
Gregorio Barba-Espín,Eduardo Nicolas,M.S. Almansa,Elena Cantero-Navarro,Alfonso Albacete,José Antonio Hernández,Pedro Diaz-Vivancos +6 more
TL;DR: A relationship between endogenous H₂O₁ contents and plant growth is suggested, so reinforcing the intricate crosstalk between reactive oxygen species (ROS) and plant hormones in seed germination signalling and early seedling development.
Journal ArticleDOI
Polyploidy affects the seed, dormancy and seedling characteristics of a perennial grass, conferring an advantage in stressful climates.
Amelia V. Stevens,Amelia V. Stevens,Amelia V. Stevens,Adrienne B. Nicotra,Robert C. Godfree,Lydia K. Guja,Lydia K. Guja +6 more
TL;DR: Novel demonstrations of the effect that polyploidy, sometimes in interaction with developmental environment and possibly also asexuality, can have on within-species variation in seed and seedling traits that increase fitness in stressful environments are provided.
BookDOI
Epigenetic memory and control in plants
Gideon Grafi,Nir Ohad +1 more
TL;DR: Recent advances in understanding of epigenetic mechanisms are highlighted as a major determinant through which internal and external signals, such as those occurring during hybridization, flowering time, reproduction and response to stress, communicate with plant cells to bring about activation of multiple nuclear processes and consequently plant growth and development.
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.