烟草野火病病原细菌(Pseudomonas syringaepv.tabaci)的鉴定

本实验对黑龙江省烟草叶片上引起退绿晕圈症状的病原细菌从形态学、培养性状、生理生化反应、抗菌素反应、抗血清反应及寄生范围等几方面进行了鉴定.结果表明:该菌为烟草野火病菌〔Pseudomonas syringae pv.tabaci(Wolf&Foster(1917)Young,Dye&Wilkie(1978)〕.试验菌株在细菌学性状等方面与已有的报道无显著差异,但在致病性(寄主范围)等方面则明显不同.本文还报道了该菌的几个新寄主.

IDENTIFICATION OF TOBACCO WILDFIRE PATHOGENIC BACTERIA ISOLATED FROM HEILONGJIANG, CHINA

Four isolates of plant pathogenic bacteria, which caused the symptoms of brown lesions surrounded by pronouced chlorotic halos on tobacco in Heilong-jiang province, were identified as Pseudomonas syringae pv. tabaci morphologically, physiologically, biochemically, seroiogically and pathologically. These four isolates did not differ in bacterial characters with those reported by other authors, but they differed pathologically with the bacteria reported by Ribeiro. The bacteria tested could infect bean, soybean, cowpea, tomato,potato pepper, eggplant, cucumber and Chinese cabbage, but they could not infect barley, wheat, sorghum, broad bean and cabbage. The bacteria reisolated from these hosts could incite the same symptoms on tobacco as those caused by tobacco wildfire bacterium.