从分离自云南滇东南地区土壤中的 77株丝状真菌中筛选得到 1株产胞外多糖菌株 ,编号为 31794。经对其形态学观察 ,最佳发酵条件的研究 ,以及所产胞外多糖组分的TLC和红外光谱分析 ,结果表明 ,该菌属半知菌类丛梗孢科曲霉族青霉属 (Penicilliumsp .)。经摇瓶发酵 ,该菌每升发酵液产胞外多糖得率为 12 .333g/L(干重 ) ,其胞外多糖组成分别为甘露糖 (Mannose)、葡萄糖 (Glucose)和半乳糖 (Galactose)。 A strain of exopolysaccharide was isolated from 77 filamentous fungi isolated from the soil in southeastern Yunnan, China, numbered 31794. The morphological observation, the study of the optimum fermentation conditions, as well as TLC and infrared spectroscopy analysis of exopolysaccharides produced showed that the strain Penicillium sp. (Penicillium sp.) .). The yield of exopolysaccharide per liter of fermentation was 12.333 g / L (dry weight) by shake flask fermentation. The exopolysaccharide was Mannose, Glucose and Galactose ).