Functional Divergence of MYB-Related Genes,WEREWOLFandAtMYB23inArabidopsis
Copyright policy )Functional Divergence of MYB-Related Genes,WEREWOLFandAtMYB23inArabidopsis
Epidermal cell differentiation in Arabidopsis is studied as a model system to understand the mechanisms that determine the developmental end state of plant cells. MYB-related transcription factors are involved in cell fate determination. To examine the molecular basis of this process, we analyzed the functional relationship of two R2R3-type MYB genes, AtMYB23 (MYB23) and WEREWOLF (WER). MYB23 is involved in leaf trichome formation. WER represses root-hair formation. Swapping domains between MYB23 and WER, we found that a low homology region of MYB23 might be involved in ectopic trichome initiation on hypocotyls. MYB23 and all MYB23-WER (MW) chimeric transgenes rescued the increased root-hair phenotype of the wer-1 mutant. Although WER did not rescue the gl1-1 no-trichome phenotype, MYB23 and all MW chimeric transgenes rescued gl1-1. These results suggest that MYB23 acquired a specific function for trichome differentiation during evolution.
- Kazusa DNA Research Institute Japan
- University of Miyazaki Japan
Arabidopsis Proteins, Molecular Sequence Data, Arabidopsis, Mutant Chimeric Proteins, Cell Differentiation, Plant Roots, Hypocotyl, Plant Epidermis, Protein Structure, Tertiary, DNA-Binding Proteins, Evolution, Molecular, Plant Leaves, Phenotype, Gene Expression Regulation, Plant, Mutation, Amino Acid Sequence, Sequence Alignment, Transcription Factors
Arabidopsis Proteins, Molecular Sequence Data, Arabidopsis, Mutant Chimeric Proteins, Cell Differentiation, Plant Roots, Hypocotyl, Plant Epidermis, Protein Structure, Tertiary, DNA-Binding Proteins, Evolution, Molecular, Plant Leaves, Phenotype, Gene Expression Regulation, Plant, Mutation, Amino Acid Sequence, Sequence Alignment, Transcription Factors
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