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Functional interconnection of MYC2 and SPA1 in the photomorphogenic seedling development of Arabidopsis

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Title Functional interconnection of MYC2 and SPA1 in the photomorphogenic seedling development of Arabidopsis
 
Creator Gangappa, Sreeramaiah N.
Prasad, V. Babu Rajendra
Chattopadhyay, Sudip
 
Subject Arabidopsis
MYC2
SPA1
Photomorphogenic Seedling Development
 
Description MYC2 is a basic helix-loop-helix transcription factor that cross talks with light, abscisic acid (ABA), and jasmonic acid (JA) signaling pathways. Here, we have shown that Arabidopsis (Arabidopsis thaliana) MYC2 directly binds to the G-box present in the SUPPRESSOR OF PHYTOCHROME A1 (SPA1) promoter and that it controls the expression of SPA1 in a COP1-dependent manner. Analyses of atmyc2 spa1 double mutants suggest that whereas MYC2 and SPA1 act redundantly to suppress photomorphogenic growth in the dark, they function synergistically for the suppression of photomorphogenic growth in the light. Our studies have also revealed that MYC2-mediated ABA and JA responses are further modulated by SPA1. Taken together, this study demonstrates the molecular and physiological interrelations of MYC2 and SPA1 in light, ABA, and JA signaling pathways.
 
Date 2014-02-20T09:39:44Z
2014-02-20T09:39:44Z
2010
19 September 2010
 
Type Article
 
Identifier Plant Physiol., 154(3):1210-1219
http://hdl.handle.net/123456789/143
 
Language en
 
Publisher American Society of Plant Biologists