title: Mechanisms of abscisic acid-mediated control of stomatal aperture.
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.
authors.affiliation: Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan.
authors.forename: Shintaro
authors.initials: S
authors.lastname: Munemasa
authors.affiliation: Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA.
authors.forename: Felix
authors.initials: F
authors.lastname: Hauser
authors.affiliation: Division of Biological Sciences, Cell and Developmental Biology Section, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA.
authors.forename: Jiyoung
authors.initials: J
authors.lastname: Park
authors.affiliation: University of Heidelberg, Centre for Organismal Studies, Plant Developmental Biology, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany.
authors.forename: Rainer
authors.initials: R
authors.lastname: Waadt
authors.affiliation: Structural Plant Biology Laboratory, Department for Botany and Plant Biology, University of Geneva, 30 Quai E. Ansermet, 1211 Geneva, Switzerland.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Brandt
authors.affiliation: 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.
authors.forename: Julian I
authors.initials: JI
authors.lastname: Schroeder
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000378:metabolism*; D018521:Plant Physiological Phenomena; D054046:Plant Stomata / Q000502:physiology*; D015398:Signal Transduction
chemical_list: D010937:Plant Growth Regulators; D000040:Abscisic Acid