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Abstract

Angiosperms are able to respond rapidly to the first sign of dry conditions, a decrease in air humidity, more accurately described as an increase in the vapor pressure deficit between the leaf and the atmosphere (VPD), by abscisic acid (ABA)-mediated stomatal closure. The genes underlying this response offer valuable candidates for targeted selection of crop varieties with improved drought tolerance, a critical goal for current plant breeding programs, to maximize crop production in drier and increasingly marginalized environments, and meet the demands of a growing population in the face of a changing climate. Here, we review current understanding of the genetic mechanisms underpinning ABA-mediated stomatal closure, a key means for conserving water under dry conditions, examine how these mechanisms evolved, and discuss what remains to be investigated.

Item Type:	Article
Authors/Creators:	Sussmilch, F and McAdam, AM
Keywords:	stomata, humidity, vapor pressure deficit (VPD), abscisic acid (ABA), 9-cis-epoxycarotenoid dioxygenase (NCED), water deficit stress, evolution, sensing water status
Journal or Publication Title:	Plants
Publisher:	M D P I AG
ISSN:	2223-7747
DOI / ID Number:	10.3390/plants6040054
Copyright Information:	Copyright 2017 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Related URLs:	Google Scholar: Sussmilch, F UTAS Profile: Sussmilch, F
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