【摘要】 从土壤中分离到一株对香蕉枯萎病菌(Fusariumoxysporumf.sp.cubense)具有抑制作用的拮抗细菌———假单胞杆菌(Pseudomonassp.),并对其抑菌效果、热稳定性以及作用机理进行了初步研究.结果表明,拮抗细菌发酵液及其无菌滤液对香蕉枯萎病菌的生长及其分生孢子的萌发具有显著的抑制作用(P<0 05),并导致病菌菌丝和分生孢子芽管扭曲、膨大;拮抗细菌发酵液经121℃处理30min后,对病菌生长的抑制作用降低.更多还原

【Abstract】 An antagonistic bacterium against Fusarium oxysporum f. sp.cubensewas isolated from soil in banana garden. Its inhibitive efficacy,thermostability and action mechanism were primarily studied. The results showed that its culture solution and cell-free filtrate strongly suppressed the hyphal growth and spore germination ofFusarium oxysporumf. sp. cubense;the terminal mycelia and germ tubes of spores of the pathogen were distorted and swollen after treated with the fermentation solution of antagonistic bacterium; inhibition rate of culture solution of this bacterium against the growth of the pathogen was reduced significantly after it was treated under 121℃ for 30 min.更多还原