A Calcium Sensor Homolog Required for Plant Salt Tolerance

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Science  19 Jun 1998:
Vol. 280, Issue 5371, pp. 1943-1945
DOI: 10.1126/science.280.5371.1943

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Excessive sodium (Na+) in salinized soils inhibits plant growth and development. A mutation in the SOS3 gene renders Arabidopsis thaliana plants hypersensitive to Na+-induced growth inhibition. SOS3 encodes a protein that shares significant sequence similarity with the calcineurin B subunit from yeast and neuronal calcium sensors from animals. The results suggest that intracellular calcium signaling through a calcineurin-like pathway mediates the beneficial effect of calcium on plant salt tolerance.

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