The impact of environmental factors on exopolysaccharide production by Streptomyces hygroscopicus

Introduction: Exopolysaccharides are natural compounds that are produced by different bacterial species, which has the properties, are frequency applications. Of its applications in the food industry as a thickening determination of flavor and color, used in medicine to reduce blood cholesterol, triglyceride, against tumors and cancers as well as in agriculture pharmaceuticals etc. Exopolysaccharide approved in the GRAS (Generally recognized as safe) list. The aim of this study was the effect of environmental factors on production exopolysaccharides by Streptomyces hygroscopicus strains PTCC1132. Materials and methods: In this study, using the Taguchi method by examining factors such as temperature, mannitol and salt concentration in the optimum conditions for exopolysaccharide production by the bacterium Streptomyces hygroscopicus strains PTCC1132. considering table of the 3 factors and 3 levels design 9 testing. The results were analyzed using the computer program Qualitek-4. Results and conclusion: The results of the test, this thesis indicates that the bacterium Streptomyces hygroscopicus strains PTCC1132 the presence of mannitol as a sugar alcohols produce more exopolysaccharides and exopolysaccharide production by this strain of bacteria is directly related to the extent. There is a direct relationship with temperature, but the temperature 35ċ on proven process takes due to the increasing use of polysaccharides with different industries and their widespread use medical and pharmaceutical industries can be a good option for exopolysaccharide production.

Keywords:

Exopolysaccharide , Streptomyces hygroscopicus , Strains PTCC1132 , Taguchi