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Trends Plant Sci. 2005 Feb;10(2):51-4.

bHLH class transcription factors take centre stage in phytochrome signalling.

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1
Center for Integrative Genomics, University of Lausanne, BEP, CH-1015 Lausanne, Switzerland.

Abstract

The phytochrome family of photoreceptors (there are five phytochromes in Arabidopsis, named phyA to phyE) maximally absorbs red and far-red light and plays important functions throughout the life cycle of plants. Several recent studies have shown that multiple related bHLH (basic helix-loop-helix) class transcription factors play key roles in phytochrome signal transduction. Somewhat surprisingly these transcription factors primarily act as negative regulators of phytochrome signalling. Moreover, in some cases, the phytochromes inhibit those negative regulators.

PMID:
15708340
DOI:
10.1016/j.tplants.2004.12.005
[Indexed for MEDLINE]
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