几种玉米弯孢霉叶斑病菌生物学特性的比较  

The comparison on biological characteristics of four kinds of Curvulana species

作　　者：李晓宇[1,2] 石洁[1,3] 董金皋[1] 

机构地区：[1]河北农业大学真菌毒素实验室,河北保定071001 [2]河北大学 生命科学学院,河北保定071002 [3]河北省农林科学院 植物保护研究所,河北保定071000

出　　处：《河北农业大学学报》2002年第3期61-64,69,共5页Journal of Hebei Agricultural University

摘　　要：对画眉草弯孢、新月弯孢、棒状弯孢和中隔弯孢4种玉米弯孢霉叶斑病菌的生物学特性进行了比较,明确了它们在分生孢子形态、大小、产孢量以及对温度、pH值、光照适应性等方面的差异。总的看来,这4种弯孢霉菌丝生长的最适温度为25～30℃,孢子产生的最适温度是25～35℃,最适pH范围为6～7,最适碳源为葡萄糖,碳源浓度对菌丝生长影响不大,光照能促进菌丝的生长。试验结果还发现,有的弯孢霉在培养基中可以产生不同的色素。供试所有种类弯孢霉的无菌培养滤液,可抑制玉米种子根的伸长,证明这4种弯孢霉在人工培养过程中都可产生致病毒素。The biological characteristics of four kinds of Curvularia species, the C.eragrostidis, C.lunata, C.clavata, and C.intermedia have been compared. There are obvious difference in conidial morphology, sporulation and the effect of temperature, pH value, light and so on. In general ,the suitable temperature of hyphae growth is 25～30℃, the suitable temperature of spore production is 25～35℃, suitable pH value is 6～7. Suitable carbon source for hyphae growth is glucose, but there is no obvious difference among different concentration of carbon source. Light could stimulate the hyphae growth. Some Curvularia species could produce pigment during culture, and their culture filtrate could inhibit the root growth of corn.

关 键 词：玉米 弯孢霉叶斑病毒 生物学特性 致病毒素 

分 类 号：S435.131[农业科学—农业昆虫与害虫防治]