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Research Paper

CAPRICE positively regulates stomatal formation in the Arabidopsis hypocotyl

Laura Serna

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In the Arabidopsis hypocotyl, stomata develop only from a set of epidermal cell files. Previous studies have identified several negative regulators of stomata formation. Such regulators also trigger non-hair cell fate in the root. Here, it is shown that TOO MANY MOUTHS (TMM) positively regulates CAPRICE (CPC) expression in differentiating stomaless-forming cell files, and that the CPC protein might move to the nucleus of neighbouring stoma-forming cells, where it promotes stomata formation in a redundant manner with TRIPTYCHON (TRY). Unexpectedly, the CPC protein was also localized in the nucleus and peripheral cytoplasm of hypocotyl fully differentiated epidermal cells, suggesting that CPC plays an additional role to those related to stomata formation. These results identify CPC and TRY as positive regulators of stomata formation in the embryonic stem, which increases the similarity between the genetic control of root hair and stoma cell fate determination.

Authors

Laura Serna

Facultad de Ciencias del Medio Ambiente; Universidad de Castilla-La Mancha; Toledo, Spain

This is an open-access article

 Download PDF

If the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.