【摘要】 从云南省曲靖、宣威、开远、峨山、江川、昆明等6 个县、市采集的马铃薯青枯病典型病株中分离到57 个菌株,对番茄和马铃薯进行了致病性测定,并研究了它们对3 种双糖和3 种己醇的氧化能力和其他一些生理生化反应。试验初步证明,云南省马铃薯青枯菌存在3 个生物型,供试的大部分菌株属于生物型Ⅲ(17/57)和1 个新生物型(31/57),少数菌株属生物型Ⅴ。首次发现云南省马铃薯青枯菌存在复合侵染的现象,即:不同生物型的青枯菌侵染同一马铃薯植株。更多还原

【Abstract】 Fifty seven strains of Pseudomonas solanacearum isolated from typical diseased potato plants in ten different areas were examed for pathogenisity on tomato and potato,and oxidative utilization of three kinds of disaccharide(maltose,lactose and cellobiose)and three kinds of hexy1 alcohol(mannitol,dulcitol and sorbitol).Some physiological and biochemicial characteristics were determined The results indicates that isolates of potato bactertial wilt had three biotypes in Yunnan province .Most isolates belong to BiotypeⅢ(17/57)and a new biotype (31/57)which couldnt utilize dulcitol and the rest beolongs to Biotype V(9/57) A complex infection phenomenon was first reported that different biotypes of isolats were isolated from same potato plant更多还原