关键词: 拜赖青霉, 尖孢镰刀菌, 大丽轮枝菌, 活性产物

Abstract: The antagonistic activity of Penicillium bilaiae ACCC 30440 against Fusarium oxysporum and Verticillium dahliae was screened and determined by plate confrontation experiment and growth rate method. The results showed that ACCC 30440 fermentation broth and ethyl acetate extract could inhibit the growth of F. oxysporum and V. dahliae, and the inhibition rate to F. oxysporum and V. dahliae were both more than 40% with 10% fermentation broth, while 20% fermentation broth completely inhibited the growth of these two pathogenic fungi. The half inhibitory concentrations of ACCC 30440 ethyl acetate extract on F. oxysporum and V. dahliae were 518.63 μg/mL and 443.42 μg/mL, respectively. The results indicated that P. bilaiae ACCC 30440 strain could produce bioactive metabolites that inhibited the growth of phytopathogenic fungi.

Key words: Penicillium bilaiae, Fusarium oxysporum, Verticillium dahliae, bioactive metabolites