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The energy cost of the tonoplast futile sodium leak


Shabala, S and Chen, G and Chen, ZH and Pottosin, I, The energy cost of the tonoplast futile sodium leak, New Phytologist, 225, (3) pp. 1105-1110. ISSN 0028-646X (2020) [Refereed Article]

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Copyright 2019 the authors

DOI: doi:10.1111/nph.15758


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.

Item Details

Item Type:Refereed Article
Keywords:H+-ATPase, halophyte, salinity stress, tonoplast ion channels, two-pore channel 1 (TPC1), vacuolar sodium sequestration, tonoplast, SV, VF
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Other plant production and plant primary products not elsewhere classified
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:136645
Year Published:2020
Web of Science® Times Cited:50
Deposited By:Agriculture and Food Systems
Deposited On:2020-01-11
Last Modified:2021-10-13

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