Guard cell SLAC1-type anion channels mediate flagellin-induced stomatal closure

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 208(2015), 1 vom: 08. Okt., Seite 162-73
1. Verfasser:	Guzel Deger, Aysin (VerfasserIn)
Weitere Verfasser:	Scherzer, Sönke, Nuhkat, Maris, Kedzierska, Justyna, Kollist, Hannes, Brosché, Mikael, Unyayar, Serpil, Boudsocq, Marie, Hedrich, Rainer, Roelfsema, M Rob G
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2015
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't ABA Arabidopsis thaliana S-type anion channel flg22 guard cells innate immunity microbe-associated molecular pattern (MAMP) stomata mehr... Arabidopsis Proteins Bacterial Proteins Ion Channels Membrane Proteins SLAC1 protein, Arabidopsis SLAH3 protein, Arabidopsis Flagellin 12777-81-0 Abscisic Acid 72S9A8J5GW FRK1 protein, Arabidopsis EC 2.7.- Protein Kinases FLS2 protein, Arabidopsis EC 2.7.1.- OST1 protein, Arabidopsis ABI1 protein, Arabidopsis EC 3.1.3.- Phosphoprotein Phosphatases EC 3.1.3.16

Beschreibung
Zusammenfassung:	© 2015 The Authors. New Phytologist © 2015 New Phytologist Trust. During infection plants recognize microbe-associated molecular patterns (MAMPs), and this leads to stomatal closure. This study analyzes the molecular mechanisms underlying this MAMP response and its interrelation with ABA signaling. Stomata in intact Arabidopsis thaliana plants were stimulated with the bacterial MAMP flg22, or the stress hormone ABA, by using the noninvasive nanoinfusion technique. Intracellular double-barreled microelectrodes were applied to measure the activity of plasma membrane ion channels. Flg22 induced rapid stomatal closure and stimulated the SLAC1 and SLAH3 anion channels in guard cells. Loss of both channels resulted in cells that lacked flg22-induced anion channel activity and stomata that did not close in response to flg22 or ABA. Rapid flg22-dependent stomatal closure was impaired in plants that were flagellin receptor (FLS2)-deficient, as well as in the ost1-2 (Open Stomata 1) mutant, which lacks a key ABA-signaling protein kinase. By contrast, stomata of the ABA protein phosphatase mutant abi1-1 (ABscisic acid Insensitive 1) remained flg22-responsive. These data suggest that the initial steps in flg22 and ABA signaling are different, but that the pathways merge at the level of OST1 and lead to activation of SLAC1 and SLAH3 anion channels
Beschreibung:	Date Completed 01.06.2016 Date Revised 25.03.2024 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.13435