樱桃褐斑病病原菌生物学特性及品种抗性评价

摘要

The biological characteristics of Passalora circumscissa isolated from Tai'an and the resistance of 39 cherry varieties in the field were studied.The results showed that OA and PCDA were the optimum culture media for pathogen growth.The optimum temperature was 25℃ (10 to 35℃).Glucose and peptone were the optimum carbon and nitrogen sources.The pathogen adapted to a wide range of pH values,growing well from pH 4 to pH12,and the optimum pH value was 7.The mycelium grew faster in darkness.For germination of conidia,the optimum temperature and pH were 25℃ and 7,respectively.Different varieties exhibited different disease resistances,including six highly resistant varieties,12 resistant varieties,9 moderately resistant varieties,8 susceptible varieties,4 highly susceptible varieties,and immune varieties were not found.%研究了樱桃褐斑病病原菌的生物学特性,评价了39个樱桃品种对褐斑病田间抗病能力.结果表明,燕麦培养基和PCDA培养基最适于病菌生长;该病菌在10～35℃均能生长,25℃为最适生长温度;葡萄糖和蛋白胨是适宜病菌生长的碳、氮源;病菌有较广的酸碱度适应范围,在pH4～12均能生长,在pH7条件下生长速度最快;不同光照条件下,黑暗时菌丝生长速度最快;分生孢子在10～35℃均能萌发,最适温度为25℃;在pH7时分生孢子萌发率最高.不同樱桃品种对褐斑病的抗病性存在差异,39个品种中高抗品种6个,抗病品种12个,中抗品种9个,感病品种8个,高感品种4个,无免疫品种.