天然产物研究与开发 ›› 2014, Vol. 26 ›› Issue (1): 123-127.

• 开发研究 • 上一篇    下一篇

Bacillus amyloliquefaciens C-1胞外发酵产物对食源性致病菌抑菌活性的初步研究

周文杰1,2,杨建1,2,张瑞娟1,2,万茵3,韩蓓1,2*   

  1. 1 西安交通大学医学部公共卫生学院;2 陕西省营养与食品安全工程研究中心,西安 710061; 3 南昌大学食品科学与技术国家重点实验室,南昌 330047
  • 出版日期:2014-01-31 发布日期:2014-12-15

Antimicrobial Activity on Food-Borne Pathogensof Extracellular Fermented Products from Bacillus amyloliquefaciens C-1

ZHOU Wen-jie1,2, YANG Jian1,2, ZHANG Rui-juan1,2, WAN Yin3, HAN Bei1,2*   

  1. 1 School of Public Health,Medical College of Xi’an Jiaotong University; 2 Nutrition and Food Safety Engineering Research Center of Shaanxi Province,Xi’an 710061,China; 3 State Key Laboratory of Food Science and Technology,Nanchang University,Nanchang 330047,China
  • Online:2014-01-31 Published:2014-12-15

摘要: 对本实验室自行分离的解淀粉芽孢杆菌C-1进行发酵,离心得到其上清液,平板抑菌实验结果显示该菌上清液对蜡样芽孢杆菌MS10362R、大肠杆菌ATCC 25922及厌氧梭菌(Clostridium difficile QB21)有较强的抑菌活性;在生长曲线测定中,4 mL C-1上清液可显著延长B.cereus MS10362R细胞的迟缓期,抑制细菌生长,且可排除pH等物理因素的影响,确定了C-1发酵上清液的抑菌活性;同时发现其对于MS10362R次生代谢产物-黑色素的产生和产量具有明显的抑制作用,初步推测可能与抑制细菌的群体感应有关;而从C-1上清中提纯的胞外多糖被证明不具有抑菌活性。

关键词: 解淀粉芽孢杆菌C1, 抑菌活性, 胞外多糖, 食源性致病菌

Abstract: Bacillus amyloliquefaciens C-1 was a newly isolated strain. C-1 supernatant was collected from the 72h fermentation culture.It showed high antimicrobial activity against Bacillus cereus MS10362R, Clostridium difficile QB21and Escherichia coli ATCC25922 by culture dish assay.In growth curve analysis,4 mL of C-1 supernatant in 150mL medium inhibited the growth of B.cereus MS10362R at the lag phase,and the pH changing of culture medium by the addition of 4 mL C-1 supernatant were excluded.At the same time,the production of melanin,secondary metabolite of MS10362R,was reduced,which might be the effect of QS (quorum sensing) system.Meanwhile,exopolysaccharides extracted and purified from C-1 supernatant failed to show any antimicrobial activity.

Key words: Bacillus amyloliquefaciens C-1;antifungal activity;exopolysaccharides, food-borne pathogens

中图分类号: 

Q939.9