银杏疫病病原种的鉴定  

Identification of Phytophthora species causing gingko wilt

作　　者：周志权[1] 廖咏梅[2] 林敏敏[2] 

机构地区：[1]广西科学院生物研究所,南宁530003 [2]广西大学农学院,南宁530005

出　　处：《植物病理学报》2003年第1期30-34,共5页Acta Phytopathologica Sinica

基　　金：广西自然科学基金资助项目 (桂科自 981 1 0 1 6)

摘　　要：从引起银杏疫病的病原疫霉菌株中 ,选取 2个代表菌株进行分类鉴定。根据病原菌形态特征、生理特性、寄主范围和菌体可溶性蛋白质电泳测定等 ,认为引起银杏疫病的病原疫霉为烟草疫霉 (PhytophthoranicotianaeBredadeHann)。该病原菌寄主范围较广 ,生长温度大于 35℃ ,异宗配合 ,自然条件下桂北银杏产区不能产生卵孢子 ,但在低温等不良环境下形成大量厚垣孢子。注意这些特性 ,对有效开展病害防治有十分重要的意义。Two typical Phytophthora strains which cause gingko wilt were chosen for taxonomic and identification experiment. According to morphological characteristics, physiological properties, host range and soluble protein electrophoresis, the pathogen was identified as P. nicotianae Breda de Hann. The pathogen has wide host range and its growth temperature is higher than 35℃. It is heterothallic and can not produce oospores in natural gingko growing region in the north of Guangxi. But it can produce a large number of chlamydospores in adverse environments such as low temperature. This cha- racteristics has an important significance to develop an effective method for controlling the disease.

关 键 词：银杏 疫病 病原鉴定 烟草疫霉 形态特征 生理特性 寄主范围 

分 类 号：S436.64[农业科学—农业昆虫与害虫防治]