Auxin transport and activity regulate stomatal patterning and development

Jie Le (), Xu-Guang Liu, Ke-Zhen Yang, Xiao-Lan Chen, Jun-Jie Zou, Hong-Zhe Wang, Ming Wang, Steffen Vanneste, Miyo Morita, Masao Tasaka, Zhao-Jun Ding, Jiří Friml, Tom Beeckman and Fred Sack ()
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Jie Le: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Xu-Guang Liu: University of British Columbia
Ke-Zhen Yang: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Xiao-Lan Chen: School of Life Sciences, Yunnan University
Jun-Jie Zou: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Hong-Zhe Wang: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Ming Wang: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Steffen Vanneste: Ghent University
Miyo Morita: Graduate School of Biological Sciences, Nara Institute of Science and Technology
Masao Tasaka: Graduate School of Biological Sciences, Nara Institute of Science and Technology
Zhao-Jun Ding: Ghent University
Jiří Friml: Ghent University
Tom Beeckman: Ghent University
Fred Sack: University of British Columbia

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract Stomata are two-celled valves that control epidermal pores whose spacing optimizes shoot-atmosphere gas exchange. They develop from protodermal cells after unequal divisions followed by an equal division and differentiation. The concentration of the hormone auxin, a master plant developmental regulator, is tightly controlled in time and space, but its role, if any, in stomatal formation is obscure. Here dynamic changes of auxin activity during stomatal development are monitored using auxin input (DII-VENUS) and output (DR5:VENUS) markers by time-lapse imaging. A decrease in auxin levels in the smaller daughter cell after unequal division presages the acquisition of a guard mother cell fate whose equal division produces the two guard cells. Thus, stomatal patterning requires auxin pathway control of stem cell compartment size, as well as auxin depletion that triggers a developmental switch from unequal to equal division.

Date: 2014
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DOI: 10.1038/ncomms4090

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