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In vitro Exopolysaccharide Production of Some Soil Bacteria Isolated from Soil Affected by Salt

In this study, production of exopolysaccharide (EPS) from soil bacteria isolated from the salinity soil and the effects of agitation, some carbon sources such as glucose, fructose, xylose, rhamnose and NaCl levels the on production of polysaccharide playing a role in soil aggregation were studied. Maximum EPS production for Acinetobacter sp., Pseudomonas fluorescens and Sphingomonas paucimobilis was obtained 72 h of incubation and maximum EPS production for Bacillus simplex was obtained at 96 h. Maximum EPS production was obtained at 150 rpm for all bacteria studied. Glucose gave the best result for all of bacteria. Bacillus simplex produced higher EPS and viscosity than the other bacteria. NaCl levels affected both the growth and exopolysaccharide production of the bacteria. By promoting aggregate formation, EPS produced bacteria such as S.paucimobilis, B.simplex, Acinetobacter sp. and P.fluorescens may have created favorable growth environments.