Abstract
CAM7, a member of CaM family in Arabidopsis, acts as a transcriptional regulator and enhances photomorphogenic growth and light regulated gene expression under various light conditions. HY5, a bZIP transcription factor, promotes photomorphogenesis at multiple wavelengths of light including far red, red, and blue light. Very recently, it has been shown that CAM7 and HY5 directly interact with the HY5 promoter to regulate the transcriptional activity of HY5 during Arabidopsis seedling development. In this study, we have investigated the root phenotype of cam7 hy5 double mutants and shown that CAM7 and HY5 genetically interact to control the root growth. We have further shown an interdependent function of HY5 and CAM7 in abscisic acid (ABA) responsiveness.
Keywords:
CAM7; HY5; Photomorphogenesis; bZIP; transcription.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Abscisic Acid / biosynthesis*
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Abscisic Acid / pharmacology
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Arabidopsis / genetics*
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Arabidopsis / growth & development
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Arabidopsis / metabolism*
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Arabidopsis Proteins / genetics*
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Basic-Leucine Zipper Transcription Factors / genetics*
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Calmodulin / genetics*
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Gene Expression Regulation, Developmental
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Gene Expression Regulation, Plant
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Genes, Plant
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Germination / genetics
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Mutation
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Nuclear Proteins / genetics*
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Phenotype
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Plant Growth Regulators / biosynthesis
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Plant Growth Regulators / pharmacology
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Plant Roots / growth & development
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Plant Roots / metabolism
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Plants, Genetically Modified
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Promoter Regions, Genetic
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Signal Transduction / genetics
Substances
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Arabidopsis Proteins
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Basic-Leucine Zipper Transcription Factors
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CaM7 protein, Arabidopsis
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Calmodulin
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HY5 protein, Arabidopsis
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Nuclear Proteins
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Plant Growth Regulators
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Abscisic Acid