Journal
TRENDS IN PLANT SCIENCE
Volume 27, Issue 6, Pages 588-600Publisher
CELL PRESS
DOI: 10.1016/j.tplants.2021.12.011
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Funding
- ERDF A way of making Europe
- MCIN/AEI [PID2020-113100RB]
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The enzyme activity of the plasma membrane proton pump in plants is regulated by phosphorylation, specifically through phosphorylation of a threonine residue. Understanding this complex regulatory mechanism may lead to new strategies for sustainable agriculture.
The enzyme activity of the plasma membrane (PM) proton pump, well known as arabidopsis PM H+-ATPase (AHA) in the model plant arabidopsis (Arabidopsis thaliana), is controlled by phosphorylation. Three different classes of phytohormones, brassinosteroids (BRs), abscisic acid (ABA), and auxin regulate plant growth and responses to environmental stimuli, at least in part by modulating the activity of the pump through phosphorylation of the penultimate Thr residue in its carboxyl terminus. Here, we review the current knowledge regarding this tripartite hormonal AHA regulation and highlight mechanisms of activation and deactivation, as well as the significance of hormonal crosstalk. Understanding the complexity of PM H+-ATPase regulation in plants might provide new strategies for sustainable agriculture.
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