水稻基腐病菌的越冬与侵染途径研究  

Overwintering and Infection of Erwinia chrysanthemi pv.zeae

作　　者：刘琼光[1] 王振中[1] 区伟明 区肇康 陈玉托[3] 

机构地区：[1]华南农业大学资源环境学院,广东广州510642 [2]高明市农业局,广东高明528500 [3]广东省农业厅,广东广州510500

出　　处：《华南农业大学学报》2003年第1期24-26,共3页Journal of South China Agricultural University

基　　金：广东省攻关项目(E99032)

摘　　要：采用抗利富平的水稻基腐病菌株REch7研究了病菌的越冬存活、侵染及病菌的存在部位.结果表明:水稻基腐病菌可在土壤、田水及病残体中存活,但主要越冬场所为病稻草及含病残体的土壤;病菌可以从受伤的根、茎和叶鞘侵入,但以根系侵入为主,植株受伤对病菌侵入非常关键;侵入后1周内,病菌主要集中于根茎基部.The studies of survival, overwintering, distribution in rice tissue and infection ways of Erwinia chrysanthemi pv.zeae, the causal of rice bacterial foot rot, were conducted by the rifampinresistant strain REch7. The results showed that the pathogen could overwinter in diseased residue of rice. The pathogen could infect rice by the way of wounded root, rootstem and leaf sheath. Wounded root of rice was important for the occurrence of the disease. After the pathogens invaded plant 7 days, they were in the place of root crown and rootstem zone.

关 键 词：基腐病 侵染途径 水稻 基腐病菌 越冬场所 越冬成活率 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]