黄原胶寡糖生物活性的研究  

Bioactivity of Oligosaccharide Produced by Depolymerisation of Xanthan with Xanthan-degrading Enzyme

作　　者：何晓燕[1] 张利英[1] 白雪芳[2] 杜昱光[2] 李宪臻[2] 

机构地区：[1]大连轻工业学院生物与食品工程系,大连116034 [2]中国科学院大连化学物理研究所生物工程学部,大连116023

出　　处：《微生物学通报》2005年第3期87-90,共4页Microbiology China

摘　　要：利用黄原胶降解菌Cellulom onassp.XT11生产的黄原胶降解酶,对黄原胶进行生物降解,生产具有不同粘度/还原末端比的黄原胶寡糖,并研究了黄原胶寡糖在清除羟基自由基、植物防卫反应中激活因子活性和对植物病原菌抑制能力等方面的生物活性,结果表明黄原胶寡糖具有清除羟基自由基能力,并能激活植物防卫系统以抵御病原菌的侵染,同时对野油菜黄单孢菌也具有抑菌活性。The production of xanthan-degrading enzyme was induced when newly isolated Cellulomonas sp. XT11 grown in xanthan medium and inhibited by the addition of glucose. Oligosaccharides with different ratio of viscosity and reducing sugar were prepared by depolymerization of xanthan with xanthan-degrading enzyme. These oligosaccharides were tested for their ability of clearing hydroxyl radical in vitro, defence responses in plant and antimicrobial. The results indicated that the oligosaccharide with 222 of ratio between viscosity and reducing sugar showed the better bioactivity.

关 键 词：黄原胶寡糖 黄原胶降解酶 羟基自由基 生物活性 

分 类 号：Q936[生物学—微生物学]