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JXB Advance Access originally published online on January 27, 2009
Journal of Experimental Botany 2009 60(5):1515-1521; doi:10.1093/jxb/ern339
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© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

This article appears in the following Journal of Experimental Botany issue: Special Issue: Perspectives on Plant Development [View the issue table of contents]

REVIEW-ARTICLE

The gene regulatory network for root epidermal cell-type pattern formation in Arabidopsis

John Schiefelbein*, Su-Hwan Kwak, Yana Wieckowski, Christa Barron and Angela Bruex

Department of Molecular, Cellular, and Developmental Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA

* To whom correspondence should be addressed: E-mail: schiefel{at}umich.edu

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.

Key words: Cell division, cell specification, pattern formation, positional information, signalling, transcriptional regulation

Received 22 September 2008; Revised 1 December 2008 Accepted 2 December 2008


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