黄曲霉毒素B1降解菌株的筛选及鉴定

被引:69
作者
李俊霞 [1 ]
梁志宏 [1 ]
关舒 [2 ]
汪晓 [1 ]
王宁 [2 ]
计成 [2 ]
牛天贵 [1 ]
机构
[1] 中国农业大学食品科学与营养工程学院
[2] 中国农业大学动物科技学院
关键词
黄曲霉毒素B1; 生物脱毒; 嗜麦芽窄食单胞菌(Stenotrophomonas sp.); 鉴定;
D O I
暂无
中图分类号
S476 [生物防治];
学科分类号
0904 ;
摘要
【目的】筛选能降解黄曲霉毒素B1(AFB1)的细菌,以期在该毒素的生物脱毒中得到应用。【方法】以香豆素为惟一碳源和能源进行AFB1降解菌株的初筛,之后将初筛的10株菌分别降解浓度为100μg·kg-1的AFB1。【结果】筛选出的NMO-3菌株降解AFB1能力达85.7%,显著高于其它菌株(P<0.01)。从形态、生理生化反应以及16SrDNA序列比对等方面分析,最终确定NMO-3菌株为嗜麦芽窄食单胞菌(Stenotrophomonas sp.)。【结论】利用香豆素作为惟一碳源和能源筛选出了黄曲霉毒素降解菌株,后期试验证明活菌制剂在2.56×1010CFU/ml剂量以下不会引起急性毒性反应,用65%硫酸铵提取的蛋白(酶)具有AFB1降解能力。
引用
收藏
页码:1459 / 1463
页数:5
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