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Science 20 August 1999:
Vol. 285. no. 5431, pp. 1256 - 1258
DOI: 10.1126/science.285.5431.1256
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Reports

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

Maris P. Apse, * Gilad S. Aharon, * Wayne A. Snedden, Eduardo Blumwald dagger

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.

Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada.
*   These authors contributed equally to this work.

dagger    To whom correspondence should be addressed. E-mail: blumwald{at}botany.utoronto.ca

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   Abstract »    Full Text »    PDF »
Elicitor-Activated Phospholipase A2 Generates Lysophosphatidylcholines That Mobilize the Vacuolar H+ Pool for pH Signaling via the Activation of Na+-Dependent Proton Fluxes.
K. Viehweger, B. Dordschbal, and W. Roos (2002)
PLANT CELL 14, 1509-1525
   Abstract »    Full Text »    PDF »
Genetic Manipulation of Vacuolar Proton Pumps and Transporters.
R. A. Gaxiola, G. R. Fink, and K. D. Hirschi (2002)
Plant Physiology 129, 967-973
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Regulation of SOS1, a plasma membrane Na+/H+ exchanger in Arabidopsisthaliana, by SOS2 and SOS3.
Q.-S. Qiu, Y. Guo, M. A. Dietrich, K. S. Schumaker, and J.-K. Zhu (2002)
PNAS 99, 8436-8441
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Increased vacuolar Na+/H+ exchange activity in Salicornia bigelovii Torr. in response to NaCl.
G. E. Parks, M. A. Dietrich, and K. S. Schumaker (2002)
J. Exp. Bot. 53, 1055-1065
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Overexpression of a Na+/H+ antiporter confers salt tolerance on a freshwater cyanobacterium, making it capable of growth in sea water.
R. Waditee, T. Hibino, T. Nakamura, A. Incharoensakdi, and T. Takabe (2002)
PNAS 99, 4109-4114
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AtHKT1 is a salt tolerance determinant that controls Na+ entry into plant roots.
A. Rus, S. Yokoi, A. Sharkhuu, M. Reddy, B.-h. Lee, T. K. Matsumoto, H. Koiwa, J.-K. Zhu, R. A. Bressan, and P. M. Hasegawa (2001)
PNAS
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Engineering salt-tolerant Brassica plants: Characterization of yield and seed oil quality in transgenic plants with increased vacuolar sodium accumulation.
H.-X. Zhang, J. N. Hodson, J. P. Williams, and E. Blumwald (2001)
PNAS
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