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Friend or Foe? Chloride patterning in halophytes

Bazihizina, N, Colmer, TD, Cuin, TA ORCID: 0000-0002-7026-1500, Mancuso, S and Shabala, S ORCID: 0000-0003-2345-8981 2019 , 'Friend or Foe? Chloride patterning in halophytes' , Trends in Plant Science, vol. 24, no. 2 , pp. 142-151 , doi: 10.1016/j.tplants.2018.11.003.

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Abstract

In this opinion article, we challenge the traditional view that breeding for reduced Cl− uptake would benefit plant salinity tolerance. A negative correlation between shoot Cl− concentration and plant biomass does not hold for halophytes – naturally salt tolerant species. We argue that, under physiologically relevant conditions, Cl− uptake requires plants to invest metabolic energy, and that the poor selectivity of Cl−-transporting proteins may explain the reported negative correlation between Cl− accumulation and crop salinity tolerance. We propose a new paradigm: salinity tolerance could be achieved by improving the selectivity of some of the broadly selective anion-transporting proteins (e.g., for NO3− > Cl−), alongside tight control of Cl− uptake, rather than targeting traits mediating its efflux from the root.

Item Type: Article
Authors/Creators:Bazihizina, N and Colmer, TD and Cuin, TA and Mancuso, S and Shabala, S
Keywords: salinity, halophytes, chloride
Journal or Publication Title: Trends in Plant Science
Publisher: Elsevier Science London
ISSN: 1360-1385
DOI / ID Number: 10.1016/j.tplants.2018.11.003
Copyright Information:

Copyright 2018 Elsevier Ltd.

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