A drought stress-responsive metabolite malate modulates stomatal responses through G-protein-dependent pathway in grapevine and Arabidopsis
Authors: Mimata, Y., Gong, R., Pei, X., Qin, G., Ye, W.
Date: 2025-02-27 · Version: 2
DOI: 10.1101/2024.04.02.587830 Category: Plant Biology
Model Organism: Multi-species
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The study examined how tricarboxylic acid (TCA) cycle metabolites influence drought tolerance in grapevine and Arabidopsis, finding that malate uniquely triggers stomatal closure via elevations in cytosolic Ca2+ and activation of the SLAC1 anion channel. G-proteins were shown to be essential for malate‑mediated signaling, linking metabolic changes to drought response through a second‑messenger cascade.
drought stress TCA cycle metabolites malate signaling guard cells G‑protein