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Curr Opin Plant Biol. 2015 Dec;28:154-62. doi: 10.1016/j.pbi.2015.10.010. Epub 2015 Nov 19.

Mechanisms of abscisic acid-mediated control of stomatal aperture.

Author information

1
Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan.
2
Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA.
3
University of Heidelberg, Centre for Organismal Studies, Plant Developmental Biology, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany.
4
Structural Plant Biology Laboratory, Department for Botany and Plant Biology, University of Geneva, 30 Quai E. Ansermet, 1211 Geneva, Switzerland.
5
Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA. Electronic address: jischroeder@ucsd.edu.

Abstract

Drought stress triggers an increase in the level of the plant hormone abscisic acid (ABA), which initiates a signaling cascade to close stomata and reduce water loss. Recent studies have revealed that guard cells control cytosolic ABA concentration through the concerted actions of biosynthesis, catabolism as well as transport across membranes. Substantial progress has been made at understanding the molecular mechanisms of how the ABA signaling core module controls the activity of anion channels and thereby stomatal aperture. In this review, we focus on our current mechanistic understanding of ABA signaling in guard cells including the role of the second messenger Ca(2+) as well as crosstalk with biotic stress responses.

PMID:
26599955
PMCID:
PMC4679528
DOI:
10.1016/j.pbi.2015.10.010
[Indexed for MEDLINE]
Free PMC Article

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