Genetic basis of sodium exclusion and sodium tolerance in yeast. A model for plants | Zendy

Haro Rosario | Zendy; Bañuelos María A. | Zendy; Quintero Francisco J. | Zendy; Rubio Francisco | Zendy; RodríguezNavarro Alonso | Zendy

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Genetic basis of sodium exclusion and sodium tolerance in yeast. A model for plants

Author(s) -

Haro Rosario,

Bañuelos María A.,

Quintero Francisco J.,

Rubio Francisco,

RodríguezNavarro Alonso

Publication year - 1993

Publication title -

physiologia plantarum

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.351

H-Index - 146

eISSN - 1399-3054

pISSN - 0031-9317

DOI - 10.1111/j.1399-3054.1993.tb05298.x

Subject(s) - efflux , yeast , vacuole , sodium , transformation (genetics) , mutant , strain (injury) , biology , biochemistry , chemistry , microbiology and biotechnology , gene , organic chemistry , anatomy , cytoplasm

A yeast strain carrying disruptions in TRK1 and ENA genes was very sensitive to Na + because uptake discriminated poorly between K + and Na + , and Na + efflux was insignificant. Transformation with TRK1 and ENA1 restored discrimination, Na + efflux and Na + tolerance. Increasing external Ca 2+ increased Na + tolerance almost in the same proportion in TRK1 enal cells and in trkl ENAI cells, suggesting an unspecific effect of this cation. By using a vacuolar ATPase mutant, the role of the vacuole in Na + tolerance was also demonstrated. The yeast model of Na + exclusion and Na + tolerance may be extended to plants.

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