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Abstract

The accumulation of sugar alcohols and other low molecular weight metabolites such as proline and glycine-betaine is a widespread response that may protect against environmental stress that occurs in a diverse range of organisms. Transgenic tobacco plants that synthesize and accumulate the sugar alcohol mannitol were engineered by introduction of a bacterial gene that encodes mannitol 1-phosphate dehydrogenase. Growth of plants from control and mannitol-containing lines in the absence and presence of added sodium chloride was analyzed. Plants containing mannitol had an increased ability to tolerate high salinity.

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Information

Published In

Science
Volume 259 | Issue 5094
22 January 1993

Submission history

Received: 8 July 1992
Accepted: 6 November 1992
Published in print: 22 January 1993

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Authors

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Mitchell C. Tarczynski
Department of Biochemistry, University of Arizona, Tucson, AZ 85721
Richard G. Jensen
Department of Biochemistry, University of Arizona, Tucson, AZ 85721
Hans J. Bohnert
Department of Biochemistry, University of Arizona, Tucson, AZ 85721

Notes

Correspondence should be addressed at 5 Prime → 3 Prime, Inc., 5603 Arapahoe, Boulder, CO 80303

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