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SHORT HYPOCOTYL IN WHITE LIGHT1, a serine-arginine-aspartate rich protein in Arabidopsis, acts as a negative regulator of photomorphogenic growth

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Title SHORT HYPOCOTYL IN WHITE LIGHT1, a serine-arginine-aspartate rich protein in Arabidopsis, acts as a negative regulator of photomorphogenic growth
 
Creator Bhatia, Shikha
Gangappa, Sreeramaiah N.
Kuswaha, Ritu
Kundu, Snehangshu
Chattopadhyay, Sudip
 
Subject Serine-Arginine-Aspartate-Rich Protein
SHORT HYPOCOTYL IN WHITE LIGHT1
Photomorphogenic Growth
Arabidopsis
 
Description Light is an important factor for plant growth and development. We have identified and functionally characterized a regulatory
gene SHORT HYPOCOTYL IN WHITE LIGHT1 (SHW1) involved in Arabidopsis (Arabidopsis thaliana) seedling development.
SHW1 encodes a unique serine-arginine-aspartate-rich protein, which is constitutively localized in the nucleus of hypocotyl
cells. Transgenic analyses have revealed that the expression of SHW1 is developmentally regulated and is closely associated
with the photosynthetically active tissues. Genetic and molecular analyses suggest that SHW1 acts as a negative regulator of
light-mediated inhibition of hypocotyl elongation, however, plays a positive regulatory role in light-regulated gene expression.
The shw1 mutants also display shorter hypocotyl in dark, and analyses of shw1 cop1 double mutants reveal that SHW1
acts nonredundantly with COP1 to control hypocotyl elongation in the darkness. Taken together, this study provides evidences
that SHW1 is a regulatory protein that is functionally interrelated to COP1 and plays dual but opposite regulatory roles in
photomorphogenesis.
 
Date 2013-11-06T10:49:58Z
2013-11-06T10:49:58Z
2008
January 2008
 
Type Article
 
Identifier Plant Physiol. 147: 169-178
http://hdl.handle.net/123456789/81
 
Language en
 
Publisher American Society of Plant Biologists