This Article Full Text Full Text (PDF) PPT slides of all figures Supplemental Data Author Profile All Versions of this Article: 21/9/2624    most recent tpc.109.069765v1 Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in Plant Cell Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Web of Science (3) Citing Articles via Google Scholar Google Scholar Articles by Kang, C.-Y. Articles by Yang, H.-Q. Search for Related Content PubMed PubMed Citation Articles by Kang, C.-Y. Articles by Yang, H.-Q. Agricola Articles by Kang, C.-Y. Articles by Yang, H.-Q.

Cryptochromes, Phytochromes, and COP1 Regulate Light-Controlled Stomatal Development in Arabidopsis^[W]

^a National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
^b School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China

¹ Address correspondence to hqyang{at}sjtu.edu.cn.

In Arabidopsis thaliana, the cryptochrome (CRY) blue light photoreceptors and the phytochrome (phy) red/far-red light photoreceptors mediate a variety of light responses. COP1, a RING motif–containing E3 ubiquitin ligase, acts as a key repressor of photomorphogenesis. Production of stomata, which mediate gas and water vapor exchange between plants and their environment, is regulated by light and involves phyB and COP1. Here, we show that, in the loss-of-function mutants of CRY and phyB, stomatal development is inhibited under blue and red light, respectively. In the loss-of-function mutant of phyA, stomata are barely developed under far-red light. Strikingly, in the loss-of-function mutant of either COP1 or YDA, a mitogen-activated protein kinase kinase kinase, mature stomata are developed constitutively and produced in clusters in both light and darkness. CRY, phyA, and phyB act additively to promote stomatal development. COP1 acts genetically downstream of CRY, phyA, and phyB and in parallel with the leucine-rich repeat receptor-like protein TOO MANY MOUTHS but upstream of YDA and the three basic helix-loop-helix proteins SPEECHLESS, MUTE, and FAMA, respectively. These findings suggest that light-controlled stomatal development is likely mediated through a crosstalk between the cryptochrome-phytochrome-COP1 signaling system and the mitogen-activated protein kinase signaling pathway.

Related articles in Plant Cell:

Integration of Signaling Pathways in Stomatal Development

Gregory Bertoni
Plant Cell 2009 21: 2542. [Full Text]  

This article has been cited by other articles:

				K. M. Peterson, A. L. Rychel, and K. U. Torii Out of the Mouths of Plants: The Molecular Basis of the Evolution and Diversity of Stomatal Development PLANT CELL, February 1, 2010; 22(2): 296 - 306. [Abstract] [Full Text] [PDF]

				G. Bertoni Integration of Signaling Pathways in Stomatal Development PLANT CELL, September 1, 2009; 21(9): 2542 - 2542. [Full Text] [PDF]