GENETIC-BASIS OF SODIUM EXCLUSION AND SODIUM TOLERANCE IN YEAST - A MODEL FOR PLANTS

被引：81

作者：

HARO, R ^{[1
]}

BANUELOS, MA ^{[1
]}

QUINTERO, FJ ^{[1
]}

RUBIO, F ^{[1
]}

RODRIGUEZNAVARRO, A ^{[1
]}

机构：

[1] ESCUELA TECN SUPER INGN AGRON, MICROBIOL LAB, E-28040 MADRID, SPAIN

来源：

PHYSIOLOGIA PLANTARUM | 1993年 / 89卷 / 04期

关键词：

ION TRANSPORT; SACCHAROMYCES CEREVISIAE; SODIUM EXCLUSION; SODIUM TOLERANCE; YEAST;

D O I：

10.1111/j.1399-3054.1993.tb05298.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

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 Ca2+ increased Na+ tolerance almost in the same proportion in TRK1 ena1 cells and in trk1 ENA1 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 Nac exclusion and Na+ tolerance may be extended to plants.

引用

页码：868 / 874

页数：7

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