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Light Signal Transduction in Higher Plants

Light Signal Transduction in Higher Plants ▪ Abstract Plants utilize several families of photoreceptors to fine-tune growth and development over a large range of environmental conditions. The UV-A/blue light sensing phototropins mediate several light responses enabling optimization of photosynthetic yields. The initial event occurring upon photon capture is a conformational change of the photoreceptor that activates its protein kinase activity. The UV-A/blue light sensing cryptochromes and the red/far-red sensing phytochromes coordinately control seedling establishment, entrainment of the circadian clock, and the transition from vegetative to reproductive growth. In addition, the phytochromes control seed germination and shade-avoidance responses. The molecular mechanisms involved include light-regulated subcellular localization of the photoreceptors, a large reorganization of the transcriptional program, and light-regulated proteolytic degradation of several photoreceptors and signaling components. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Genetics Annual Reviews

Light Signal Transduction in Higher Plants

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References (207)

Publisher
Annual Reviews
Copyright
Copyright © 2004 by Annual Reviews. All rights reserved
ISSN
0066-4197
eISSN
1545-2948
DOI
10.1146/annurev.genet.38.072902.092259
pmid
15568973
Publisher site
See Article on Publisher Site

Abstract

▪ Abstract Plants utilize several families of photoreceptors to fine-tune growth and development over a large range of environmental conditions. The UV-A/blue light sensing phototropins mediate several light responses enabling optimization of photosynthetic yields. The initial event occurring upon photon capture is a conformational change of the photoreceptor that activates its protein kinase activity. The UV-A/blue light sensing cryptochromes and the red/far-red sensing phytochromes coordinately control seedling establishment, entrainment of the circadian clock, and the transition from vegetative to reproductive growth. In addition, the phytochromes control seed germination and shade-avoidance responses. The molecular mechanisms involved include light-regulated subcellular localization of the photoreceptors, a large reorganization of the transcriptional program, and light-regulated proteolytic degradation of several photoreceptors and signaling components.

Journal

Annual Review of GeneticsAnnual Reviews

Published: Dec 15, 2004

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