Exopolysaccharide II production is regulated by salt in the halotolerant strain Rhizobium meliloti EFB1

Article Abstract:

Salt also affects the production of exopolysaccharide (EPS) in the halotolerant strain Rhizobium meliloti EFB1. The difference in the production of EPS II in the presence and absence of salt is regulated at the transcriptional level. These were the findings in a study of EPS production in Rhizobium meliloti EFB1. The transposon-induced mutant was isolated, that, when grown in the absence of salt, had a colony morphology similar to that of the wild type grown in the presence of salt. Results indicated that galactoglucan is produced by strain EFB1 and that this production declines when the organism is grown in the presence of salt.

Salt, Salt (Food), Rhizobium meliloti

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Potential of unicellular cyanobacteria from saline environments as exopolysaccharide producers

Article Abstract:

At least three Cyanothece strains, CA 3, CE 4 and 16Som2, show some potential for industrial application. This was found after 15 Cyanothece strains were isolated from saline environments and characterized in terms of exopolysaccharide (EPS) production. Six to eight monosaccharides were found in the exocellular polysaccharides, with one or two acidic sugars. Acetyl, pyruvyl and/or sulfate groups were also noted in some EPS.

Cyanobacteria

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Studies on a viscous, gel-forming exopolysaccharide from Sphingomonas paucimobilis GS1

Article Abstract:

Analysis of a exopolysaccharide isolated from Sphingogomonas paucimobilis GS1 reveals that the viscosity of the exopolysaccharide is 5.5 times higher than that of xanthan gum. The exopolysaccharide exhibits high stability over a wide range of pH and temperatures. Deacetylation of the polymer in the presence of cations leads to the formation of a clear, agarlike, thermoreversible gel.

Bacteria

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