A Study of Bacillus thuringiensis Strain LTS290 Inhibiting Fusarium

doi:10.13560/j.cnki.biotech.bull.1985.2015.08.022

Abstract

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

Zhou Guowang, Li Yuhong, Zhang Yuan, Li Haitao, Liu Rongmei, Gao Jiguo. A Study of Bacillus thuringiensis Strain LTS290 Inhibiting Fusarium[J]. Biotechnology Bulletin, 2015, 31(8): 153-158.

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