The Complex Fine-Tuning of K+ Fluxes in Plants in Relation to Osmotic and Ionic Abiotic Stresses
BPMP, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France
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Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(3), 715; https://doi.org/10.3390/ijms20030715
Received: 29 November 2018 / Revised: 17 January 2019 / Accepted: 29 January 2019 / Published: 7 February 2019
(This article belongs to the Special Issue Regulation of Mineral Nutrients Homeostasis and Their Crosstalk in Plants)
As the main cation in plant cells, potassium plays an essential role in adaptive responses, especially through its involvement in osmotic pressure and membrane potential adjustments. K+ homeostasis must, therefore, be finely controlled. As a result of different abiotic stresses, especially those resulting from global warming, K+ fluxes and plant distribution of this ion are disturbed. The hormone abscisic acid (ABA) is a key player in responses to these climate stresses. It triggers signaling cascades that ultimately lead to modulation of the activities of K+ channels and transporters. After a brief overview of transcriptional changes induced by abiotic stresses, this review deals with the post-translational molecular mechanisms in different plant organs, in Arabidopsis and species of agronomical interest, triggering changes in K+ uptake from the soil, K+ transport and accumulation throughout the plant, and stomatal regulation. These modifications involve phosphorylation/dephosphorylation mechanisms, modifications of targeting, and interactions with regulatory partner proteins. Interestingly, many signaling pathways are common to K+ and Cl−/NO3− counter-ion transport systems. These cross-talks are also addressed.
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Keywords:
plants; abiotic stress; abscisic acid; potassium transport regulation
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MDPI and ACS Style
Chérel, I.; Gaillard, I. The Complex Fine-Tuning of K+ Fluxes in Plants in Relation to Osmotic and Ionic Abiotic Stresses. Int. J. Mol. Sci. 2019, 20, 715. https://doi.org/10.3390/ijms20030715
AMA Style
Chérel I, Gaillard I. The Complex Fine-Tuning of K+ Fluxes in Plants in Relation to Osmotic and Ionic Abiotic Stresses. International Journal of Molecular Sciences. 2019; 20(3):715. https://doi.org/10.3390/ijms20030715
Chicago/Turabian StyleChérel, Isabelle; Gaillard, Isabelle. 2019. "The Complex Fine-Tuning of K+ Fluxes in Plants in Relation to Osmotic and Ionic Abiotic Stresses" Int. J. Mol. Sci. 20, no. 3: 715. https://doi.org/10.3390/ijms20030715
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