The energy cost of the tonoplast futile sodium leak

The New Phytologist
Sergey ShabalaIgor Pottosin

Abstract

Active removal of Na+ from the cytosol into the vacuole plays a critical role in salinity tissue tolerance, but another, often neglected component of this trait is Na+ retention in vacuoles. This retention is based on an efficient control of Na+ -permeable slow- and fast-vacuolar channels that mediate the back-leak of Na+ into cytosol and, if not regulated tightly, could result in a futile cycle. This Tansley insight summarizes our current knowledge of regulation of tonoplast Na+ -permeable channels and discusses the energy cost of vacuolar Na+ sequestration, under different scenarios. We also report on a phylogenetic and bioinformatic analysis of the plant two-pore channel family and the difference in its structure and regulation between halophytes and glycophytes, in the context of salinity tolerance.

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Citations

May 31, 2019·The Plant Journal : for Cell and Molecular Biology·Honghong WuSergey Shabala
Apr 21, 2019·The New Phytologist·Rana MunnsStephen D Tyerman
Apr 22, 2019·The New Phytologist·Rana MunnsCaitlin S Byrt
Aug 9, 2019·The New Phytologist·Lars H Wegner, Sergey Shabala
Jan 3, 2020·The New Phytologist·Dale Sanders
Apr 9, 2020·Frontiers in Plant Science·Celymar A SolisZhong-Hua Chen
Aug 9, 2020·Frontiers in Plant Science·Beibei HuZhong-Hua Chen
Mar 27, 2020·Frontiers in Plant Science·Natalia RaddatzJosé M Pardo
Oct 31, 2020·Frontiers in Plant Science·Stanislav V IsayenkovSergey Shabala
Sep 2, 2020·Trends in Plant Science·Ingo DreyerRainer Hedrich
Feb 24, 2021·Physiologia Plantarum·Celymar Angela SolisZhong-Hua Chen
Mar 26, 2021·Breeding Science·Ichirou Karahara, Tomoaki Horie
Jun 29, 2021·Frontiers in Plant Science·Maike Cosse, Thorsten Seidel
Jun 12, 2021·Journal of Experimental Botany·Ali RazzaqSergey Shabala

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