大白菜软腐菌种群组成及优势菌致病型的研究  

Study on population structure and dominant pathogenic types of soft rot bacteria in Brassica pekinensis

作　　者：臧威[1] 张耀伟[2] 孙剑秋[1] 崔崇士[2] 

机构地区：[1]齐齐哈尔大学生命科学与工程学院,黑龙江齐齐哈尔161006 [2]东北农业大学园艺学院,黑龙江哈尔滨150030

出　　处：《植物资源与环境学报》2006年第1期26-29,共4页Journal of Plant Resources and Environment

基　　金：国家高技术研究发展计划("863")项目资助(NO2004AA241120)

摘　　要：对黑龙江省成熟大白菜〔Brassica pekinensis(Lour.)Rupr.〕生产田采集的软腐病菌进行分离、纯化,并根据形态学特征分析了大白菜软腐病菌的种群组成。结果表明,引起黑龙江省秋季大白菜软腐病的主要致病菌是胡萝卜软腐欧文氏菌胡萝卜软腐亚种〔Erwinia carotovora(Jones)Bergey et al.subsp.carotovora〕(Ecc);利用20个Ecc菌株的混合菌对来源于不同生态型及不同地区的大白菜品种进行接种,筛选出5个鉴别寄主,以此将20个Ecc菌株划分为5个致病力类型,其中V型为优势致病菌,其分布广且致病力强。Soft rot bacteria from Brassica pekinensis （Lour.） Rupr. in Heilongjiang rrovince were isolated and purified to analyze the population structure of soft rot bacteria by morphologic characteristics. The results indicated that the main pathogenic bacteria in B. pekinensis was Erwinia carotovora （Jones） Bergey et al. subsp, carotovora（Ecc）. Different B. pekinensis strains were inoculated with twenty mixed strains of Ecc and five differential hosts were screened, by which twenty strains of Ecc were classified into five pathogenic types. Type V was dominant pathogenic bacteria and had general distribution and strong pathogenicity.

关 键 词：大白菜 软腐病菌 种群 致病力 鉴别寄主 

分 类 号：S436.341.13[农业科学—农业昆虫与害虫防治]