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AOBPreview originally published online on May 13, 2005
Annals of Botany 2005 96(2):169-175; doi:10.1093/aob/mci165
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© The Author 2005. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

BOTANICAL BRIEFING

Phytochromes and Shade-avoidance Responses in Plants

KEARA A. FRANKLIN and GARRY C. WHITELAM*

Department of Biology, University of Leicester, Leicester LE1 7RH, UK

* For correspondence. E-mail gcw1{at}leicester.ac.uk

Received: 19 November 2004    Returned for revision: 17 February 2005    Accepted: 4 April 2005    Published electronically: 13 May 2005

ABSTRACT

• Background and Aims The ability to detect and respond to the impending threat of shade can confer significant selective advantage to plants growing in natural communities. This Botanical Briefing highlights (a) the regulation of shade-avoidance responses by endogenous and exogenous factors and (b) current understanding of the molecular components involved in red to far-red ratio signal transduction.

• Scope The Briefing covers: (a) the shade-avoidance syndrome in higher plants; (b) the adaptive significance of shade avoidance in natural light environments; (c) phytochrome regulation of shade-avoidance responses; (d) the role of blue light signals in shade avoidance; (e) gating of rapid shade-avoidance responses by the circadian clock; (f) potential signalling components and future perspectives.

Key words: Phytochromes, red light, far-red light, red to far-red ratio, blue light, elongation growth, early flowering, circadian clock, ethylene


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