Role of a positive regulator of root hair development, CAPRICE, in Arabidopsis root epidermal cell differentiation

Takuji Wada, Tetsuya Kurata, Rumi Tominaga, Yoshihiro Koshino-Kimura, Tatsuhiko Tachibana, Koji Goto, M. David Marks, Yoshiro Shimura, Kiyotaka Okada

Research output: Contribution to journalArticlepeer-review

258 Scopus citations

Abstract

In Arabidopsis, root hairs are formed only from a set of epidermal cells named trichoblasts; or hair-forming cells. Previous studies showed CAPRICE (CPC) promotes differentiation of hair-forming cells by controlling a negative regulator, GLABRA2 (GL2), which is preferentially expressed in hairless cells. Here, we show that CPC is also predominantly expressed in the hairless cells, but not in the neighboring hair-forming cells, and that CPC protein moves to the hair-forming cells and represses the GL2 expression. We also show that the N terminus of bHLH protein interacts with CPC and is responsible for the GL2 expression. We propose a model in which CPC plays a key role in the fate-determination of hair-forming cells.

Original languageEnglish (US)
Pages (from-to)5409-5419
Number of pages11
JournalDevelopment
Volume129
Issue number23
DOIs
StatePublished - Dec 2002
Externally publishedYes

Keywords

  • Arabidopsis
  • CAPRICE
  • Epidermis
  • Myb
  • Protein movement
  • Root hair
  • Transcriptional regulation
  • bHLH

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