Functional divergence of MYB-related genes, WEREWOLF and AtMYB23 in Arabidopsis

Rumi Tominaga-Wada, Yuka Nukumizu, Shusei Sato, Tomohiko Kato, Satoshi Tabata, Takuji Wada

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


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 roothair 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.

Original languageEnglish
Pages (from-to)883-887
Number of pages5
JournalBioscience, Biotechnology and Biochemistry
Issue number5
Publication statusPublished - 2012


  • Arabidopsis thaliana
  • AtMYB23
  • Root-hair
  • Trichome


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