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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

Citation

Weller, JL and Batge, SL and Smith, JJ and Kerckhoffs, LH and Sineshchekov, VA and Murfet, IC and Reid, JB, 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, (4) pp. 2186-2195. ISSN 0032-0889 (2004) [Refereed Article]

DOI: doi:10.1104/pp.103.036103

Abstract

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.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Grain Legumes
Author:Weller, JL (Dr Jim Weller)
Author:Batge, SL (Ms Shona Lee Batge)
Author:Smith, JJ (Ms Jenny Smith)
Author:Kerckhoffs, LH (Dr Leonardus Kerckhoffs)
Author:Murfet, IC (Professor Ian Murfet)
Author:Reid, JB (Professor Jim Reid)
ID Code:29849
Year Published:2004
Web of Science® Times Cited:25
Deposited By:Plant Science
Deposited On:2004-08-01
Last Modified:2007-11-02
Downloads:0

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