高产胞外多糖(EPS)乳酸菌菌株的筛选与鉴定  

Isolation and Indentification of Lactic Acid Bacteria Strains with Higher Yield of Exopolysaccharide

作　　者：潘道东[1] 吴玲[1] 

机构地区：[1]南京师范大学金陵女子学院食品科学系,江苏南京210097

出　　处：《食品科学》2007年第3期171-174,共4页Food Science

基　　金：国家自然科学基金项目(30571311);江苏省十五攻关项目(BE2002302);江苏省自然科学基金项目(BK2005137)

摘　　要：本研究对收集的3个混合发酵剂进行了分离、筛选,并通过测定其pH值、粘度和EPS产量,从中筛选出了两株高产EPS的乳酸菌。利用API细菌鉴定系统对这两株高产EPS乳酸菌的属性进行了鉴定,分别为乳酸乳球菌乳亚种和片球菌。Sixteen strains of lactic acid bacteria have been isolated and purified from the mixed starter, and the OD value and colonies measured after 12 hours liquid culture at 40℃. The pH, viscosity coefficient and content of exopolysaccharide of yogurt made from these lactic acid bacteria strains were assayed. Two strains of lactic acid bacteria of the highest yield of exopolysaccharide are screened. They are identified by API bacterial identification system as Lactococcus lactis subsp. Lactis and Pediococcus.

关 键 词：胞外多糖 乳酸菌 

分 类 号：TS201.3[轻工技术与工程—食品科学]