AM菌根化的两种桉树苗对青枯病的抗性研究  

Resistance of the AM Fungus Eucalyptus Seedlings against Pseudomonas solanacearum

作　　者：弓明钦[1] 陈羽[1] 王凤珍[1] 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《林业科学研究》2004年第4期441-446,共6页Forest Research

基　　金：广东省自然科学基金(970771)及中澳合作ACIAR(9425)项目部分内容之一

摘　　要：AM菌对桉树幼苗接种可提高对青枯病的抗性。在有AM菌存在的情况下,桉树幼苗不发病或发病较轻。对两种桉树幼苗进行青枯病菌的人工接种结果表明:菌根苗比无菌根苗的发病率降低10%～40%,而幼树的高生长可增加12%～39%;AM菌对青枯病的防治效果优于外生菌根(即ECM)的效果,其中以AM6008和AM9004菌株的效果最好,而AM3006的效果较差;大田试验结果表明,经AM菌根化的幼苗对青枯病的抗病作用较强,发病率可下降10 0%～17 5%。Eucalyptus Seedlings inoculated with AM fungi could increase resistance against Pseudomonas solanacearum.While treating with AM fungi,Eucalyptus Seedlings could not occur of little occur in wilt disease damage.The results,injected Pseudomonas solanacearum bacteria for a series of Eucalyptus seedlings,showed that disease percentage of inoculated seedlings decreased by 10.0%～40.0%,and seedling increased by 12%～39% in height growth.AM fungus effectiveness was better than that of ECT mycorrhizal fungi,the isolate AM6008 and AM9004 were better fungi to resist the wilt bacteria,followed by AM3006.Field trial results indicated that mycorrhizal seedlings could improve resistance against the bacteria,and the disease percentage decreased by 10.0%～17.5%,although environmental factors were more different.

关 键 词：丛枝菌根 桉树青枯病 抗病性 

分 类 号：S792.39[农业科学—林木遗传育种] S763.1[农业科学—林学]