放线菌对番茄灰霉病和早疫病的拮抗作用研究

在室内对峙培养的基础上,对接种放线菌F的盆栽番茄植株接种早疫病A1、灰霉病菌B1进行田间抗性鉴定.结果表明:F菌株对2种靶标真菌均有一定的抑制作用.接种F A1、F B1的番茄植株,病情指数要明显低于对照,差异极显著.接种放线茵表现为不同程度的发病症状,且生长势差.接种生防菌真菌F对番茄PPO、POD具有一定诱导作用,在"放线菌-病原菌"双菌体系中对番茄叶片MDA含量有明显的抑制作用,双茵处理的番茄叶片、茎MDA含量明显低于单接番茄病原菌处理.

Antagonism Effect of Actinomycetes Against Tomato Grey Mould and Early Blight

The diseases resistance abilities were identified out to prevent tomato grey mould and tomato early blight in field on the basis of inhibitory activity in vitro.The results indicated that F strain had certain inhibitory action to two kinds of target fungi.Diseases indexes of F A1 and F B1treatments were distinctly lower than control.The differences were extremely remarkable.Treatments of A1 and B1 performed varied degree symptoms,and grew potential difference.Inoculated with biological control fungi F had certain induction to PPO and POD in tomato.It was obvious inhibitory action to tomato leaf blade MDA content in actinomycetes and disease germ system inoculated with actinomycetes F.MDA contents in stems and leaves were obviously lower than only inoculated with tomato disease germ processing.