Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
J Exp Bot. 2006;57(1):51-4. Epub 2005 Nov 29.

Positional information and mobile transcriptional regulators determine cell pattern in the Arabidopsis root epidermis.

Author information

  • Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, UK. liam.dolan@bbsrc.ac.uk

Abstract

The root epidermis is a model system for deciphering the mechanism underpinning the formation of cellular pattern in planar groups of cells. The epidermis comprises rows of hair cells (H) and non-hair-bearing epidermal cells (N). Laser ablation and clonal analysis have shown that the fates of epidermal cells are flexible through development and that positional information which may be located in the cell wall or extracellular matrix determines cell fate. A leucine-rich repeat protein called SCRAMBLED is required for the development of cell pattern which may be involved in the perception of positional information. It is proposed that positional signals then initiate the cell-specific expression of a number of transcription factors that complete the patterning process, resulting in the expression of hair-promoting genes in hair cells (H) and their repression in the hairless cells (N).

PMID:
16317033
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Write to the Help Desk