The Development of Cell Pattern in the Arabidopsis Root Epidermis

Olga Ortega-Martínez and Liam Dolan ()
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Olga Ortega-Martínez: John Innes Centre, Department of Cell and Developmental Biology
Liam Dolan: John Innes Centre, Department of Cell and Developmental Biology

Chapter 11 in Morphogenesis and Pattern Formation in Biological Systems, 2003, pp 129-137 from Springer

Abstract: Summary The root epidermis of Arabidopsis thaliana is composed of files (stripes) of trichoblasts that develop into hair cells, which are separated, by 1–3 files of atrichoblasts that develop into hairless epidermal cells. This pattern forms during embryogenesis and is maintained in the post-embryonic seedling root by positional signals. The maintenance of the pattern of alternating files requires the movement of small transcriptional regulators, such as CPC which moves from atrichoblasts to trichoblasts. In trichoblasts CPC represses the transcription of WER and GL2, transcription factors that promote atrichoblast/non-hair cell development. These data are consistent with a lateral inhibition model of epidermal development. According to this model the atrichobiasts negatively regulate atrichoblast fate in neighbouring cells by promoting their development into trichoblasts.

Keywords: Hair Cell; Root Hair; Cell Pattern; Root Hair Development; Root Epidermis (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-4-431-65958-7_11

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DOI: 10.1007/978-4-431-65958-7_11

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