不完全菌類Pestalotiopsis sp.の生産する高粘性多糖 : 微生物の生産する多糖に関する研究(第2報)

概要

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Cultural conditions for the production of polysaccharide by a fungi imperfecti in soybean whey were discussed, then some chemical properties and the viscosity of the polysaccharide were investigated.1. The microbe was regarded as a Pestalotiopsis species.2. The strain, no. 101,was cultivated in a jar fementor on soybean whey at pH5.5 and 30℃ with aeration of 0.8 vvm and agitation at 300 to 800 rpm. After 40 hrs' cultivation, 0.85% of glucose was added to the substrate, and after 64 hrs' cultivation, 9 to 10 g/l of polysaccharide was produced.3. The polysaccharide contained only glucose subunits, and its chemical structure was indicated as β-1,3 glucan with (1→6) glucoside linkage.4. A 0.2 to 1% suspension of the polysaccharide in water showed a high viscosity after it had been heated at 85℃ for 1 min and cooled to room temperature.5. No acute or sub-acute toxicity of the polysaccharide or mycelia were found toward mice.
社団法人日本生物工学会の論文
1981-04-25