【摘要】 从烟草根部分离到的内生细菌118菌株,对烟草黑胫病有很好的防效,实验证明,其防治作用机理包括直接拮抗作用和诱导抗病作用。该菌能抑制烟草疫霉菌丝生长、游动孢子游动、萌发;而且具有诱导抗病作用,施菌后,POD,PAL活性明显上升。更多还原

【Abstract】 An endophytic bacterium strain, 118, isolated from tobacco rhizome, was used to inoculate the plants of tobacco variety K326 when they were at the 4-6-leaf stage. The control effect of the strain against tobacco black shank (Phytophthora parasitica var. nicotianae) was good. Its mechanisms for disease controlling involved both direct resistance and induced disease resistance. This endophytic bacterium strain inhibited hypha growth and the movement and germination of the zoospores of Ph. parasitica var. nicotianae. It also induced Ph. rarasitica var. nicotianae resistance in the plants as it induced higher activity of POD and PAL. 更多还原