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Friend or Foe? Chloride patterning in halophytes
journal contributionposted on 2023-05-20, 00:42 authored by Bazihizina, N, Colmer, TD, Tracey Cuin, Mancuso, S, Sergey ShabalaSergey Shabala
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.
Publication titleTrends in Plant Science
Department/SchoolTasmanian Institute of Agriculture (TIA)
PublisherElsevier Science London
Place of publication84 Theobalds Rd, London, England, Wc1X 8Rr
Rights statementCopyright 2018 Elsevier Ltd.