Abstract:
Bacterial strain EN02, an exopolysaccharide producing bacterium was isolated and screened from sugar cane in Nakhon Pathom Province. Analysis of polymer upon acid hydrolysis via thin layer chromatography suggested the content of xylose with Rf value of 0.7091. Medium composition and growth conditions for growth and polymer production are: modified medium of Bromfield and Tallgren consist of 4% (w/v) sucrose, 0.1% (w/v) (NH4)₂SO₄ and 0.1% (w/v) yeast extract, 0.02% MgSO₄⋅7H₂O, 0.9% K₂HPO₄ and 0.3% KH₂PO₄ with initial pH of 6.5 while shaken at 200 rpm at 30°C for 2 hours for optimal growth then shift to 40°C for 16 hours for polymer production. Under such condition, strain EN02 was able to produce polysaccharide at 8.57 mg/ml. The obtained polysaccharide was characterized as acidic polysaccharide composed of 88.94 % total sugar and 0.29% protein. HPLC profile and Ultraviolet-visible light spectroscopy of its acid hydrolysate comfirmed result from earlier ana