Friend or Foe? Chloride Patterning in Halophytes

Nadia Bazihizina, Timothy D. Colmer, Tracey Ann Cuin, Stefano Mancuso, Sergey Shabala

Research output: Contribution to journalReview article

4 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)142-151
Number of pages10
JournalTrends in Plant Science
Volume24
Issue number2
DOIs
Publication statusPublished - Feb 2019

Cite this

Bazihizina, Nadia ; Colmer, Timothy D. ; Cuin, Tracey Ann ; Mancuso, Stefano ; Shabala, Sergey. / Friend or Foe? Chloride Patterning in Halophytes. In: Trends in Plant Science. 2019 ; Vol. 24, No. 2. pp. 142-151.
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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.",
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Bazihizina, N, Colmer, TD, Cuin, TA, Mancuso, S & Shabala, S 2019, 'Friend or Foe? Chloride Patterning in Halophytes' Trends in Plant Science, vol. 24, no. 2, pp. 142-151. https://doi.org/10.1016/j.tplants.2018.11.003

Friend or Foe? Chloride Patterning in Halophytes. / Bazihizina, Nadia; Colmer, Timothy D.; Cuin, Tracey Ann; Mancuso, Stefano; Shabala, Sergey.

In: Trends in Plant Science, Vol. 24, No. 2, 02.2019, p. 142-151.

Research output: Contribution to journalReview article

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T1 - Friend or Foe? Chloride Patterning in Halophytes

AU - Bazihizina, Nadia

AU - Colmer, Timothy D.

AU - Cuin, Tracey Ann

AU - Mancuso, Stefano

AU - Shabala, Sergey

PY - 2019/2

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AB - 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.

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KW - PLASMA-MEMBRANE

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KW - ION DISTRIBUTION

KW - WATER RELATIONS

KW - ARABIDOPSIS

KW - PLANT

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