Abstract
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.
Publication types
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Amino Acid Sequence
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Animals
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Arabidopsis / genetics*
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Arabidopsis / growth & development*
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Arabidopsis / metabolism
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Arabidopsis Proteins*
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Binding Sites
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Calcineurin / chemistry
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Calcium / metabolism*
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Calcium / pharmacology
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Calcium-Binding Proteins / chemistry
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Chromosome Mapping
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Cloning, Molecular
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Genes, Plant
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Ion Transport
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Molecular Sequence Data
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Mutation
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Open Reading Frames
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Plant Proteins / chemistry*
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Plant Proteins / genetics*
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Saccharomyces cerevisiae / chemistry
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Signal Transduction
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Sodium / metabolism
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Sodium / pharmacology*
Substances
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Arabidopsis Proteins
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Calcium-Binding Proteins
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Plant Proteins
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SOS3 protein, Arabidopsis
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Sodium
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Calcineurin
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Calcium