Salt Tolerance Conferred by Overexpression of a Vacuolar Na$^+$/H$^+$ Antiport in Arabidopsis

Agricultural productivity is severely affected by soil salinity. One possible mechanism by which plants could survive salt stress is to compartmentalize sodium ions away from the cytosol. Overexpression of a vacuolar Na$^+$/H$^+$ antiport from Arabidopsis thaliana in Arabidopsis plants promotes sust...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1999-08, Vol.285 (5431), p.1256-1258
Hauptverfasser:	Apse, Maris P., Aharon, Gilad S., Snedden, Wayne A., Blumwald, Eduardo
Format:	Artikel
Sprache:	eng
Schlagworte:	Adaptation to environment and cultivation conditions Agronomy. Soil science and plant productions Antibodies Arabidopsis - drug effects Arabidopsis - genetics Arabidopsis - metabolism Arabidopsis - physiology Arabidopsis Proteins Biological and medical sciences Cation Transport Proteins Cell membranes Chloride Channels - metabolism Chlorides - metabolism Flowers & plants Fluorescence Fractions Fundamental and applied biological sciences. Psychology Gene Expression Genetics and breeding of economic plants Hydrogen - metabolism Plant Leaves - metabolism Plant physiology and development Plant Proteins - genetics Plant Proteins - metabolism Plants Plants, Genetically Modified Salt Salt tolerance Sodium - metabolism Sodium Chloride - toxicity Sodium-Hydrogen Exchangers - genetics Sodium-Hydrogen Exchangers - metabolism Soil salinity Soils Table salt Transcripts (Written Records) Transgenic plants Vacuoles Vacuoles - metabolism Varietal selection. Specialized plant breeding, plant breeding aims Water and solutes. Absorption, translocation and permeability Yeasts
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Zusammenfassung:	Agricultural productivity is severely affected by soil salinity. One possible mechanism by which plants could survive salt stress is to compartmentalize sodium ions away from the cytosol. Overexpression of a vacuolar Na$^+$/H$^+$ antiport from Arabidopsis thaliana in Arabidopsis plants promotes sustained growth and development in soil watered with up to 200 millimolar sodium chloride. This salinity tolerance was correlated with higher-than-normal levels of AtNHX1 transcripts, protein, and vacuolar Na$^+$/H$^+$ (sodium/proton) antiport activity. These results demonstrate the feasibility of engineering salt tolerance in plants.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.285.5431.1256