低聚木糖对青春双歧杆菌的增殖  

Effect of Xylo－ oligosaccharides on Proliferatin of Bifidobacterium Adolescentis

作　　者：徐勇[1] 江华[1] 勇强[1] 余世袁[1] 

机构地区：[1]南京林业大学化学工程学院,210037

出　　处：《食品科学》2001年第7期15-17,共3页Food Science

基　　金：国家自然科学基金资助项目 (39770601)

摘　　要：通过体外严格厌氧培养技术，比较葡萄糖、木糖和定向酶解植物半纤维素制备的低聚木糖三种碳源增殖青春双歧杆菌的效果，检测了该低聚木糖的双歧因子作用。研究表明，该低聚木糖对青春双歧杆菌具有良好的增殖效果，青春双歧杆菌在优先利用木二糖和木三糖的同时可能会生成胞外酶，该酶可降解聚合度较高木四糖和木五糖使之转变为聚合度更小、更易为双歧杆菌的吸收代谢的低聚木糖和木糖。In this paper,the effects of three carbon sources,namely,xylose and xylo－ oligosaccharides, on the enzymatic selective hydrolysis of plant hemicelluloses,by the anaerobic culture of bifidobacterium adolescentis in vitro,and the abilit to promote the proliferation of bifidobacteria were examined.It was shown that the home－ made xylo－ oligosaccharides were cap able to support the growth of bifidobacterium adolescentis.It was found that the bifidobacterium adolescentis could metabolize xylobiose and xylotriose preferentially,and secrete extracellular enzymes,which were able to degrade the xylotetraose and xylopentose into the lower molecular weight xylo－ oligosaccharides to be digested easily by bifidobacterium adolescentis.

关 键 词：低聚木糖 青春双歧杆菌 厌氧培养 增殖效果 食品发酵 

分 类 号：TS201.3[轻工技术与工程—食品科学]