Journal article Open Access

Friend or Foe? Chloride Patterning in Halophytes

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

Files (2.5 MB)
Name Size
Bazihizina et al 2019.pdf
2.5 MB Download
Views 120
Downloads 400
Data volume 1.0 GB
Unique views 115
Unique downloads 226


Cite as