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Publication Type J
Authors Karimi, S. M., M. Freund, B. M. Wager, M. Knoblauch, J. Fromm, H. M. Mueller, P. Ache, M. Krischke, M. J. Mueller, T. Muller, M. Dittrich, C. M. Geilfus, A. H. Alfarhan, R. Hedrich and R. Deeken
Title Under salt stress guard cells rewire ion transport and abscisic acid signaling
Source New Phytologist
Language English
Author Keywords abscisic acid (ABA) glycophyte Arabidopsis guard cell halophyte Thellungiella Eutrema ion transport salt stress soil stomata water-use efficiency arabidopsis-thaliana stomatal closure salinity stress anion channels tolerance calcium k+ chloride slac1 Plant Sciences
Abstract Soil salinity is an increasingly global problem which hampers plant growth and crop yield. Plant productivity depends on optimal water-use efficiency and photosynthetic capacity balanced by stomatal conductance. Whether and how stomatal behavior contributes to salt sensitivity or tolerance is currently unknown. This work identifies guard cell-specific signaling networks exerted by a salt-sensitive and salt-tolerant plant under ionic and osmotic stress conditions accompanied by increasing NaCl loads. We challenged soil-grown Arabidopsis thaliana and Thellungiella salsuginea plants with short- and long-term salinity stress and monitored genome-wide gene expression and signals of guard cells that determine their function. Arabidopsis plants suffered from both salt regimes and showed reduced stomatal conductance while Thellungiella displayed no obvious stress symptoms. The salt-dependent gene expression changes of guard cells supported the ability of the halophyte to maintain high potassium to sodium ratios and to attenuate the abscisic acid (ABA) signaling pathway which the glycophyte kept activated despite fading ABA concentrations. Our study shows that salinity stress and even the different tolerances are manifested on a single cell level. Halophytic guard cells are less sensitive than glycophytic guard cells, providing opportunities to manipulate stomatal behavior and improve plant productivity.
Author Address [Karimi, Sohail M.; Freund, Matthias; Mueller, Heike M.; Ache, Peter; Hedrich, Rainer; Deeken, Rosalia] Univ Wurzburg, Dept Mol Plant Physiol & Biophys, Julius von Sachs Pl 2, D-97082 Wurzburg, Germany. [Wager, Brittney M.; Knoblauch, Michael] Washington State Univ, Sch Biol Sci, POB 644236, Pullman, WA 99164 USA. [Fromm, Joerg] Univ Hamburg, Inst Wood Sci, Dept Biol, Leuschnerstr 91d, D-21031 Hamburg, Germany. [Krischke, Markus; Mueller, Martin J.] Univ Wurzburg, Dept Pharmaceut Biol, Julius Sachs Pl 2, D-97082 Wurzburg, Germany. [Mueller, Tobias; Dittrich, Marcus] Univ Wurzburg, Bioctr, Dept Bioinformat, D-97074 Wurzburg, Germany. [Geilfus, Christoph-Martin] Humboldt Univ, Albrecht Daniel Thaer Inst Agr & Hort Sci, Controlled Environm Hort, Albrecht Thaer Weg 3, D-14195 Berlin, Germany. [Alfarhan, Ahmed H.] King Saud Univ, Coll Sci, Dept Bot & Microbiol, POB 2455, Riyadh 11451, Saudi Arabia. Deeken, R (corresponding author), Univ Wurzburg, Dept Mol Plant Physiol & Biophys, Julius von Sachs Pl 2, D-97082 Wurzburg, Germany. deeken@botanik.uni-wuerzburg.de
ISSN 0028-646X
ISBN 0028-646X
29-Character Source Abbreviation New Phytol.
Publication Date Aug
Year Published 2021
Volume 231
Issue 3
Beginning Page 1040-1055
Digital Object Identifier (DOI) 10.1111/nph.17376
Unique Article Identifier WOS:000661910000001

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