Epidermal Cell Differentiation in Arabidopsis Determined by a Myb Homolog, CPC

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Science  22 Aug 1997:
Vol. 277, Issue 5329, pp. 1113-1116
DOI: 10.1126/science.277.5329.1113

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The roots of plants normally carry small hairs arranged in a regular pattern. Transfer DNA–tagged lines of Arabidopsis thaliana included a mutant with few, randomly distributed root hairs. The mutated gene CAPRICE (CPC) encoded a protein with a Myb-like DNA binding domain typical of transcription factors involved in animal and plant development. Analysis in combination with other root hair mutations showed that CPCmay work together with the TTG gene and upstream of the GL2 gene. Transgenic plants overexpressingCPC had more root hairs and fewer trichomes than normal. Thus, the CPC gene determines the fate of epidermal cell differentiation in Arabidopsis.

  • * Present address: Biomolecular Engineering Research Institute, 6-2-3 Furuedai, Suita, Osaka, 565, Japan.

  • To whom correspondence should be addressed at the Department of Botany, Graduate School of Science, Kyoto University, Kyoto, 606-01, Japan. E-mail: kiyo{at}

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