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Developmental regulation of CYCA2s contributes to tissue‐specific proliferation in Arabidopsis

Developmental regulation of CYCA2s contributes to tissue‐specific proliferation in Arabidopsis In multicellular organisms, morphogenesis relies on a strict coordination in time and space of cell proliferation and differentiation. In contrast to animals, plant development displays continuous organ formation and adaptive growth responses during their lifespan relying on a tight coordination of cell proliferation. How developmental signals interact with the plant cell‐cycle machinery is largely unknown. Here, we characterize plant A2‐type cyclins, a small gene family of mitotic cyclins, and show how they contribute to the fine‐tuning of local proliferation during plant development. Moreover, the timely repression of CYCA2;3 expression in newly formed guard cells is shown to require the stomatal transcription factors FOUR LIPS/MYB124 and MYB88, providing a direct link between developmental programming and cell‐cycle exit in plants. Thus, transcriptional downregulation of CYCA2s represents a critical mechanism to coordinate proliferation during plant development. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The EMBO Journal Wiley

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References (79)

Publisher
Wiley
Copyright
Copyright © 2013 Wiley Periodicals, Inc
ISSN
0261-4189
eISSN
1460-2075
DOI
10.1038/emboj.2011.240
pmid
21772250
Publisher site
See Article on Publisher Site

Abstract

In multicellular organisms, morphogenesis relies on a strict coordination in time and space of cell proliferation and differentiation. In contrast to animals, plant development displays continuous organ formation and adaptive growth responses during their lifespan relying on a tight coordination of cell proliferation. How developmental signals interact with the plant cell‐cycle machinery is largely unknown. Here, we characterize plant A2‐type cyclins, a small gene family of mitotic cyclins, and show how they contribute to the fine‐tuning of local proliferation during plant development. Moreover, the timely repression of CYCA2;3 expression in newly formed guard cells is shown to require the stomatal transcription factors FOUR LIPS/MYB124 and MYB88, providing a direct link between developmental programming and cell‐cycle exit in plants. Thus, transcriptional downregulation of CYCA2s represents a critical mechanism to coordinate proliferation during plant development.

Journal

The EMBO JournalWiley

Published: May 17, 2012

Keywords: ; ; ; ;

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