Tripartite hormonal regulation of plasma membrane H + -ATPase activity.

Authors :: Miao R
Russinova E
Rodriguez PL
Source :: Trends in plant science [Trends Plant Sci] 2022 Jun; Vol. 27 (6), pp. 588-600. Date of Electronic Publication: 2022 Jan 13.
Publication Year :: 2022
Abstract: The enzyme activity of the plasma membrane (PM) proton pump, well known as arabidopsis PM H <superscript>+</superscript> -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 <superscript>+</superscript> -ATPase regulation in plants might provide new strategies for sustainable agriculture.<br />Competing Interests: Declaration of interests No interests are declared.<br /> (Copyright © 2021 Elsevier Ltd. All rights reserved.)