Three main traits are involved in salt tolerance: ion exclusion, tissue tolerance and osmotic tolerance.
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Numerous genes encoding salt tolerance traits are likely to contribute to crop performance.
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A compilation of transgenes and their effects on salt tolerance traits in crops is presented.
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Temporal and spatial control of gene-expression are often important for increasing tolerance.
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Quantifying yields in saline soils, and using proper controls in field trials, can guide crop improvement programs.