生物技术通报 ›› 2015, Vol. 31 ›› Issue (8): 153-158.doi: 10.13560/j.cnki.biotech.bull.1985.2015.08.022

• 研究报告 • 上一篇    下一篇

苏云金芽胞杆菌LTS290菌株抑制镰孢菌的作用

周国旺, 李玉红, 张圆, 李海涛, 刘荣梅, 高继国   

  1. 东北农业大学生命科学学院,哈尔滨 150030
  • 收稿日期:2014-12-15 出版日期:2015-08-21 发布日期:2015-08-22
  • 作者简介:周国旺,男,硕士,研究方向:生物防治微生物功能基因的发掘、研究和利用;E-mail:1449717662@163.com
  • 基金资助:

    转基因生物新品种培育科技重大专项(2014ZX0800913B-002),国家基础科学人才培养基金资助项目(J1210069),国家高技术研究发展计划课题(2011AA10A203),国家自然科学基金项目(31401812),黑龙江省教育厅科学技术研究项目(12521021)

A Study of Bacillus thuringiensis Strain LTS290 Inhibiting Fusarium

Zhou Guowang, Li Yuhong, Zhang Yuan, Li Haitao, Liu Rongmei, Gao Jiguo   

  1. College of Life Science,Northeast Agricultural University,Harbin 150030
  • Received:2014-12-15 Published:2015-08-21 Online:2015-08-22

摘要:

旨在扩大苏云金芽胞杆菌(Bacillus thuringiensis,Bt)的生防范围,通过对BtLTS290菌株的对峙培养和菌株无菌发酵液对镰孢菌的抑制作用进行研究。结果表明,BtLTS290菌株可抑制6种马铃薯致病镰孢菌的生长,并且BtLTS290无菌发酵液的抑菌效果显著。抑菌物质对温度不敏感,经过121℃处理 20 min后仍然具有抑菌活性。在pH3-11范围内存放12 h 后,抑菌活性变幅不大,并且用蛋白酶K处理后其抑菌活性依然存在。实验证明苏云金芽胞杆菌BtLTS290是一株可以高效抑制马铃薯致病镰孢菌的生防菌株。

关键词: 苏云金芽胞杆菌, 马铃薯干腐病, 镰孢菌, 抑菌活性, 生防菌株

Abstract:

In oder to expand the biocontrol scope of Bacillus thuringiensis(Bt), the inhibiting effects of confront culture and sterile fermented liquid of strain BtLTS290 on the growth of Fusarium were investigated. Results showed that BtLTS290 inhibited the growth of 6 strains of Fusarium, and the sterile fermented liquid of Bt had solid antibacterial effect. The fungistatic substances were not sensitive to temperature, and it still had the bacteriostatic activity for 20 min under 121℃. After storing 12 h while pH varied from 3 to 11, the range of antibacterial activity was not significantly changed. The bacteriostatic activity still existed after being treated with proteinase K. Conclusively, the work convinced that the BtLTS290 was a biocontrol strain that had efficient antagonistic activity against Fusarium of causing dry rot of potato.

Key words: Bacillus thuringiensis, dry rot of potato, Fusarium, bacteriostatic activity, biocontrol strain