A win-win scenario for photosynthesis and the plasma membrane H pump.

Front Plant Sci

Graduate School of Science, Nagoya University, Nagoya, Japan.

Published: August 2022

In plants, cytosolic and extracellular pH homeostasis are crucial for various physiological processes, including the uptake of macronutrients and micronutrients, cell elongation, cell expansion, and enzyme activity. Proton (H) gradients and the membrane potential are generated by a H pump consisting of an active primary transporter. Plasma membrane (PM) H-ATPase, a PM-localized H pump, plays a pivotal role in maintaining pH homeostasis in plant cells and extracellular regions. PM H-ATPase activity is regulated by protein abundance and by post-translational modifications. Several stimuli have been found to activate the PM H-ATPase through phosphorylation of the penultimate threonine (Thr) of the carboxy terminus. Light- and photosynthesis-induced phosphorylation of PM H-ATPase are conserved phenomena among various plant species. In this work, we review recent findings related to PM H-ATPase regulation in the photosynthetic tissues of plants, focusing on its mechanisms and physiological roles. The physiological roles of photosynthesis-dependent PM H-ATPase activation are discussed in the context of nitrate uptake and cytoplasmic streaming in leaves.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9412029PMC
http://dx.doi.org/10.3389/fpls.2022.982485DOI Listing

Publication Analysis

Top Keywords

plasma membrane
8
physiological roles
8
h-atpase
6
win-win scenario
4
scenario photosynthesis
4
photosynthesis plasma
4
membrane pump
4
pump plants
4
plants cytosolic
4
cytosolic extracellular
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!