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Appl Environ Microbiol. 1991 March; 57(3): 645-648
Copyright © 1991, American Society for Microbiology. All Rights Reserved.

Accumulation of Trehalose and Sucrose in Cyanobacteria Exposed to Matric Water Stress {dagger}

Nitzan Hershkovitz*, Aharon Oren and Yehuda Cohen

Division of Microbial and Molecular Ecology, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel

ABSTRACT

The drought-resistant cyanobacteria Phormidium autumnale, strain LPP4, and a Chroococcidiopsis sp. accumulated trehalose, sucrose, and both trehalose and sucrose, respectively, in response to matric water stress. Accumulated sugar concentrations reached values of up to 6.2 µg of trehalose per µg of chlorophyll in P. autumnale, 6.9 µg of sucrose per µg of chlorophyll in LPP4, and 4.1 µg of sucrose and 3.2 µg of trehalose per µg of chlorophyll in the Chroococcidiopsis sp. The same sugars were accumulated by these cyanobacteria in similar concentrations under osmotic water stress. Cyanobacteria that did not show drought resistance (Plectonema boryanum and Synechococcus strain PCC 7942) did not accumulate significant amounts of sugars when matric water stress was applied.

FOOTNOTES

* Corresponding author.

{dagger} This article is dedicated to the memory of our highly esteemed teacher, Moshe Shilo, who passed away on 26 June 1990.

Appl Environ Microbiol. 1991 March; 57(3): 645-648
Copyright © 1991, American Society for Microbiology. All Rights Reserved.



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Copyright © 1991 by the American Society for Microbiology. All rights reserved.