银边沿阶草炭疽病菌的鉴定及其生物学特性研究  

Identification and Characteristics of Anthracnose Pathogen of Ophiopogon intermedius cv. Argenteo- marginatus

作　　者：谢昌平[1] 牛立霞[1] 

机构地区：[1]华南热带农业大学植物保护学院,海南儋州571737

出　　处：《热带农业科学》2005年第3期18-22,共5页Chinese Journal of Tropical Agriculture

摘　　要：形态学观察和致病性比较结果表明:银边沿阶草(Ophiopogon intermedius cv.Argenteo-marginatus)炭疽病的病原菌为亚线孢炭疽菌(Collectotrichum sublinelum P.Henn);该病菌在PDA培养基上生长良好;菌丝生长的适宜温度为25～30℃;pH值3.5～7.8,以偏酸性条件有利菌丝的生长;菌丝体生长和分生孢子形成易受光环境影响,3种光照均可产生分生孢子,全光照有利于菌丝生长;分生孢子对碳源和氮源的利用,以D-木糖、D-葡萄糖、麦芽糖和以硫酸铵较好;分生孢子在50℃的水下处理10min不能萌发.The results based on the morphologic observation and pathogenic comparisons revealed that the anthracnose of Ophiopogon intermedius cv. Argenteo-marginatus was caused by Collectotrichum sublinelum P. Henn. The temperature and pH most suitable for vegetative growth was 25～30℃ and 3.5 to 7.8, respectively. Vegetative growth and conidium of pathogen were easily influenced by light environment. The conidium yielded under 3 kinds of the light treatment and whole light was benefit for mycelial growth. The fungus grows best on the PDA medium. Carbon and nitrogen sources such as D-xylose, D-glucose, maltose, and ammonium sulfate can be made better use of by the conidium. The conidium can not germinate under 50℃ of water for 10 min.

关 键 词：银边沿阶草 炭疽病 病原菌 鉴定 生物学特性 

分 类 号：S435.672[农业科学—农业昆虫与害虫防治]