The gene regulatory network for root epidermal cell-type pattern formation in <i>Arabidopsis</i>

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  • John Schiefelbein
    Department of Molecular, Cellular, and Developmental Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA
  • Su-Hwan Kwak
    Department of Molecular, Cellular, and Developmental Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA
  • Yana Wieckowski
    Department of Molecular, Cellular, and Developmental Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA
  • Christa Barron
    Department of Molecular, Cellular, and Developmental Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA
  • Angela Bruex
    Department of Molecular, Cellular, and Developmental Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA

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<jats:title>Abstract</jats:title> <jats:p>A fundamental aspect of multicellular development is the patterning of distinct cell types in appropriate locations. In this review, the molecular genetic control of cell-type pattern formation in the root epidermis of Arabidopsis thaliana is summarized. This developmental system represents a simple and genetically tractable example of plant cell patterning. The distribution of the two epidermal cell types, root-hair cells and non-hair cells, are generated by a combination of positional signalling and lateral inhibition mechanisms. In addition, recent evidence suggests that reinforcing mechanisms are used to ensure that the initial cell fate choice is adopted in a robust manner.</jats:p>

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