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Science 19 June 1998:
Vol. 280. no. 5371, pp. 1943 - 1945
DOI: 10.1126/science.280.5371.1943
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Reports

A Calcium Sensor Homolog Required for Plant Salt Tolerance

Jiping Liu, Jian-Kang Zhu *

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.

Department of Plant Sciences, University of Arizona, Tucson, AZ 85721, USA.
*   To whom correspondence should be addressed. E-mail: jkzhu{at}ag.arizona.edu

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   Abstract »    Full Text »    PDF »
The Arabidopsis thaliana SOS2 gene encodes a protein kinase that is required for salt tolerance.
J. Liu, M. Ishitani, U. Halfter, C.-S. Kim, and J.-K. Zhu (2000)
PNAS 97, 3730-3734
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Glycine residues in potassium channel-like selectivity filters determine potassium selectivity in four-loop-per-subunit HKT transporters from plants.
P. Maser, Y. Hosoo, S. Goshima, T. Horie, B. Eckelman, K. Yamada, K. Yoshida, E. P. Bakker, A. Shinmyo, S. Oiki, et al. (2002)
PNAS 99, 6428-6433
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The Arabidopsis thaliana salt tolerance gene SOS1 encodes a putative Na+/H+ antiporter.
H. Shi, M. Ishitani, C. Kim, and J.-K. Zhu (2000)
PNAS 97, 6896-6901
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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 98, 14150-14155
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The Arabidopsis salt overly sensitive 4 Mutants Uncover a Critical Role for Vitamin B6 in Plant Salt Tolerance.
H. Shi, L. Xiong, B. Stevenson, T. Lu, and J.-K. Zhu (2002)
PLANT CELL 14, 575-588
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