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. 1999 Aug 20;285(5431):1256-8.
doi: 10.1126/science.285.5431.1256.

Salt tolerance conferred by overexpression of a vacuolar Na+/H+ antiport in Arabidopsis

M P Apse  1 , G S Aharon, W A Snedden, E Blumwald
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Salt tolerance conferred by overexpression of a vacuolar Na+/H+ antiport in Arabidopsis

M P Apse et al. Science. .

Abstract

Agricultural productivity is severely affected by soil salinity. One possible mechanism by which plants could survive salt stress is to compartmentalize sodium ions away from the cytosol. Overexpression of a vacuolar Na+/H+ antiport from Arabidopsis thaliana in Arabidopsis plants promotes sustained growth and development in soil watered with up to 200 millimolar sodium chloride. This salinity tolerance was correlated with higher-than-normal levels of AtNHX1 transcripts, protein, and vacuolar Na+/H+ (sodium/proton) antiport activity. These results demonstrate the feasibility of engineering salt tolerance in plants.

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