甘肃省马铃薯茎基腐病菌生物学特性测定  

Biological Characteristics of Rhizoctonia solani Infecting Potato in Gansu Province

作　　者：雷玉明[1,2] 孟嫣[1] 郑天翔[1] 邢会琴[1] 

机构地区：[1]河西学院农业与生物技术学院,甘肃张掖734000 [2]甘肃省河西走廊特色资源利用省级重点实验室,甘肃张掖734000

出　　处：《中国马铃薯》2015年第2期112-116,共5页Chinese Potato Journal

基　　金：甘肃省教育厅科研项目(0509B-02);河西学院科研创新与应用校长基金项目(HX200910)

摘　　要：马铃薯茎基腐病是甘肃省发生面积大且危害严重的一种新发病害。试验对甘肃省马铃薯茎基腐病菌进行生物学特性研究。结果表明,该菌菌丝生长的温度范围是:最低10℃,最适25℃,最高35℃,40℃停止生长;该菌菌丝生长p H范围是:最低4.5,最适7.0,最高8.5,9.0停止生长;半光半暗有利菌丝生长;病菌能利用多种碳源,以D-半乳糖、可溶性淀粉、D-木糖最好,氮源以大豆蛋白胨、蛋白胨最适宜。研究为马铃薯茎基腐病的防治提供了理论依据。Biological characteristics of Rhizoctonia solani causing stem rot, one of potato serious diseases in Gansu Province, were studied in this research. The optimum temperature for vegetative mycelium growth was 25 ℃, and the minimum and the maximum were 10 ℃ and 35 ℃, respectively. The mycelia could not grow at 40℃. The minimum pH for vegetative mycelium growth was 4.5, the optimum was 7.0 and the maximum was 8.5. The mycelia stopped the development at 9.0. The alternation of light and darkness favored the growth of mycelia. Monosaccharide, disaccharide and polysaccharide could be used by the pathogen, and D-galactose, soluble starch and D-xylose were the better carbon source used. For nitrogen source, soybean peptone and peptone were the best. This research provides a theoretical base for control of this disease.

关 键 词：马铃薯 茎基腐病菌 生物学特性 甘肃 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]