Antifungal Activity of Bacillus coagulans TQ33, Isolated from Skimmed Milk Powder, against Botrytis cinerea

Hai Kuan Wang*, Rui Feng Xiao and Wei Qi^†

Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, PR China

Article history:
Received July 14, 2011
Accepted March 20, 2012

Key words:
plant pathogenic fungi, antifungal activity, Bacillus coagulans TQ33, Botrytis cinerea

Summary:                                                                                                                                                                                 
Bacillus coagulans TQ33 is isolated from the skimmed milk powder and has a broad antifungal activity against pathogens such as Botrytis cinerea, Alternaria solani, Phytophthora drechsleri Tucker, Fusarium oxysporum and Glomerella cingulata. The characteristics of active antifungal substances produced by B. coagulans TQ33 and its antifungal effects against the growth of plant pathogenic fungi has been evaluated. The effect of pH, temperature and protease on the antifungal activity of B. coagulans TQ33 was determined. The results of partial characterization of the antifungal compound indicated that its activity is likely to be due to the production of a proteinaceous substance together with other substances. The greenhouse trials suggest that B. coagulans TQ33 has a great potential for the control of plant pathogenic fungi.

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