2018
DOI: 10.1105/tpc.18.00612
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Sulfate is Incorporated into Cysteine to Trigger ABA Production and Stomatal Closure

Abstract: Plants close stomata when root water availability becomes limiting. Recent studies have demonstrated that soil-drying induces root-to-shoot sulfate transport via the xylem and that sulfate closes stomata. Here we provide evidence for a physiologically relevant signaling pathway that underlies sulfate-induced stomatal closure in Arabidopsis (Arabidopsis thaliana). We uncovered that, in the guard cells, sulfate activates NADPH oxidases to produce reactive oxygen species (ROS) and that this ROS induction is essen… Show more

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Cited by 95 publications
(96 citation statements)
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References 69 publications
(138 reference statements)
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“…Furthermore, research from the same group pointed out the links between sulfate and cysteine availability and the abscisic acid (ABA) transduction pathway, especially in stomata closure. It was concluded that the positive effect of sulfate or cysteine on stomatal closure was mediated by ABA because of the sulfur requirement for ABA synthesis [14][15][16]. Previously, we reported that expression of the gene encoding the selective autophagy cargo receptor Joka2 (NtNBR1) in tobacco was induced in plants exposed to sulfur deficit [7].…”
Section: Introductionmentioning
confidence: 99%
“…Furthermore, research from the same group pointed out the links between sulfate and cysteine availability and the abscisic acid (ABA) transduction pathway, especially in stomata closure. It was concluded that the positive effect of sulfate or cysteine on stomatal closure was mediated by ABA because of the sulfur requirement for ABA synthesis [14][15][16]. Previously, we reported that expression of the gene encoding the selective autophagy cargo receptor Joka2 (NtNBR1) in tobacco was induced in plants exposed to sulfur deficit [7].…”
Section: Introductionmentioning
confidence: 99%
“…Reactive oxygen species and Ca +2 signaling enter the scene very early and allow shaping and propagation of the signal (Demidchik, 2018). When WD takes place at the soil level, a root-to-shoot transmission of the WD signal seems to be mediated to some extent by sulfate which precedes abscisic acid (ABA) synthesis in leaf tissues (Ernst et al, 2010;Malcheska et al, 2017;Batool et al, 2018). However, when WD is produced by low air humidity, this condition is perceived by guard cells which synthesize ABA and, then, stomata close (Bauer et al, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…1). Despite the limited nutrient uptake from the soil during drought, SO 4 22 quickly accumulates in the xylem sap, is transported toward green tissues, is imported into the chloroplasts, and ultimately causes an increase in ABA and stomatal closure (Malcheska et al, 2017;Batool et al, 2018). Chen et al (2019) now show that this rapid drought response depends on all five SULTR3 transporters, resulting in an 80% reduction in ABA levels in the quintuple mutant compared with wildtype plants.…”
mentioning
confidence: 84%