内生真菌对草坪型高羊茅草弯孢霉叶斑病的影响  

The Effect of Endophytic Fungus on Curvularia lunate in Festuca Arundinacea

作　　者：古燕翔[1] 王代军[2] 胡跃高[1] 

机构地区：[1]中国农业大学农学与生物技术学院 [2]中国农业科学院研究生院草坪研究中心,北京100081

出　　处：《中国草地学报》2007年第3期112-115,共4页Chinese Journal of Grassland

摘　　要：研究了草坪型高羊茅品种CrossfireⅡ的含有内生真菌(简称带菌)和不含内生真菌(简称不带菌)植株,接种新月弯孢霉病原菌后叶斑病的发生情况。结果表明:带菌植株的发病率和病情指数明显低于不带菌植株,抗病效果达30%以上。叶片保护酶活性测定结果表明,过氧化物酶(POD)、苯丙氨酸解氨酶(PAL)酶活性在接种病原菌前,带菌植株低于不带菌植株;接种病原菌后,带菌植株这2种酶的活性均显著增加,增加的幅度和速度均较不带菌植株叶片相应酶活性大;多酚氧化酶(PPO)酶活性的变化没有规律性。The endophyte-infected and endophyte-uninfected plants were separated. And then in the suitable condition, Festuca arundinacea was inoculated with curvularia lunate. Results showed that disease incidence and disease index of endophyte-infested Crossfire Ⅱ were significantly lower than that of the endophyte-uninfested. And endophyte can lower the disease index by more than 30 %. The activity of POD and PAL chitinases were all higher than endophyte-uninfested plant. The changing tendency of enzyme activities was related to the reduction of disease index. But changes of PPO activity were not related to the resistance of Crossfire Ⅱ to Curvularia disease.

关 键 词：草坪型高羊茅 内生真菌 保护酶活性 弯孢霉叶斑病 

分 类 号：S688.4[农业科学—观赏园艺]