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A Dominant Mutation in the Pea PHYA Gene Confers Enhanced Responses to Light and Impairs the Light-Dependent Degradation of Phytochrome A
Weller, JL and Batge, SL and Smith, JJ and Kerckhoffs, LHJ and Sineshchekov, VA and Murfet, IC and Reid, JB (2004) A Dominant Mutation in the Pea PHYA Gene Confers Enhanced Responses to Light and Impairs the Light-Dependent Degradation of Phytochrome A. Plant Physiology, 135. pp. 2186-2195. ISSN 0032-0889
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Phytochrome A (phyA) is an important photoreceptor controlling many processes throughout the plant life cycle. It is unique within the phytochrome family for its ability to mediate photomorphogenic responses to continuous far-red light and for the strong photocontrol of its transcript level and protein stability. Here we describe a dominant mutant of garden pea (Pisum sativum) that displays dramatically enhanced responses to light, early photoperiod-independent flowering, and impaired photodestruction of phyA. The mutant carries a single base substitution in the PHYA gene that is genetically inseparable from the mutant phenotype. This substitution is predicted to direct the replacement of a conserved Ala in an N-terminal region of PHYA that is highly divergent between phyA and other phytochromes. This result identifies a region of the phyA photoreceptor molecule that may play an important role in its fate after photoconversion.
|Journal or Publication Title:||Plant Physiology|
|Page Range:||pp. 2186-2195|
|Identification Number - DOI:||10.1104/pp.103.036103|
|Additional Information:||Copyright © 2004 by the American Society of Plant Biologists|
|Date Deposited:||19 Sep 2011 06:50|
|Last Modified:||18 Nov 2014 04:22|
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