Functional Divergence of MYB-Related Genes, WEREWOLF and AtMYB23 in Arabidopsis

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Abstract

Epidermal cell differentiation in <i>Arabidopsis</i> 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, <i>AtMYB23</i> (<i>MYB23</i>) and <i>WEREWOLF</i> (<i>WER</i>). <i>MYB23</i> is involved in leaf trichome formation. <i>WER</i> 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. <i>MYB23</i> and all <i>MYB23-WER</i> (<i>MW</i>) chimeric transgenes rescued the increased root-hair phenotype of the <i>wer-1</i> mutant. Although <i>WER</i> did not rescue the <i>gl1-1</i> no-trichome phenotype, <i>MYB23</i> and all <i>MW</i> chimeric transgenes rescued <i>gl1-1</i>. These results suggest that MYB23 acquired a specific function for trichome differentiation during evolution.

Journal

  • Bioscience, Biotechnology, and Biochemistry

    Bioscience, Biotechnology, and Biochemistry 76(5), 883-887, 2012-05-23

    Japan Society for Bioscience, Biotechnology, and Agrochemistry

References:  30

Codes

  • NII Article ID (NAID)
    10030752411
  • NII NACSIS-CAT ID (NCID)
    AA10824164
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09168451
  • NDL Article ID
    023681815
  • NDL Call No.
    Z53-G223
  • Data Source
    CJP  NDL  J-STAGE 
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