Journal article
Molecular aspects of seed dormancy
Annual review of plant biology, Vol.59(1), pp.387-415
2008
Handle:
https://hdl.handle.net/2376/110548
PMID: 18257711
Abstract
Seed dormancy provides a mechanism for plants to delay germination until conditions are optimal for survival of the next generation. Dormancy release is regulated by a combination of environmental and endogenous signals with both synergistic and competing effects. Molecular studies of dormancy have correlated changes in transcriptomes, proteomes, and hormone levels with dormancy states ranging from deep primary or secondary dormancy to varying degrees of release. The balance of abscisic acid (ABA):gibberellin (GA) levels and sensitivity is a major, but not the sole, regulator of dormancy status. ABA promotes dormancy induction and maintenance, whereas GA promotes progression from release through germination; environmental signals regulate this balance by modifying the expression of biosynthetic and catabolic enzymes. Mediators of environmental and hormonal response include both positive and negative regulators, many of which are feedback-regulated to enhance or attenuate the response. The net result is a slightly heterogeneous response, thereby providing more temporal options for successful germination.
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Details
- Title
- Molecular aspects of seed dormancy
- Creators
- Ruth Finkelstein - Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, California 93106-9610, USA. finkelst@lifesci.ucsb.eduWendy ReevesTohru AriizumiCamille Steber
- Publication Details
- Annual review of plant biology, Vol.59(1), pp.387-415
- Academic Unit
- Crop and Soil Sciences, Department of
- Publisher
- United States
- Identifiers
- 99900547353401842
- Language
- English
- Resource Type
- Journal article