【摘要】 从广东、福建、湖南、江西及浙江5省7市采集的14科33种观赏植物上分离到199株软腐欧文氏杆菌菌株,44项理化性状鉴定结果:126株为胡萝卜软腐欧文氏杆菌胡萝卜变种(Erwinia carotovora pv. carotovora简称Ecc)、7株为菊欧文氏杆菌(Erwinia chrysanthemi简称Ech)、66株介于Ecc和Ech之间的中间型(Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ)。Ecc和中间型菌株是我国观赏植物的主要病原细菌。在本文中首次报道了竹芋科(竹芋)、苋科(千日红)两科及一些植物种:芦荟、白穗花、玉簪、黄精、富贵竹、兜兰、砂仁及饿术草是软腐欧文氏杆菌的新的寄主植物。血清学研究表明,Eca、Ecc及Ech这三个种之间不发生交叉反应,但同一个种内是可以起反应的。另外,Ecc与中间型相互之间有沉淀反应,表明它们之间的亲缘关系较近。更多还原

【Abstract】 199 strains of soft rot Erwinia were isolated from 33 species of ornamentals. According to 44 physiological and biochemical characters these strains were identified as Erwinia carotovora pv. carotovora (Ecc), E. chrysanthemi (Ech) and 5 intermediate types ( I ,II, III , IV , V ). Ecc and 5 intermediate types were the main pathogens of ornamentals in China. Only 7 strains from 3 hosts were Ech. Serololgical relationships among 199 strains were determined by Ouchterlony double diffusion test of live cell with 6 antisera ( i Eca, 2 Ech, 2 Ecc, 1 intermediate type). There was no serological relation among Eca, Ecc and Ech. There was close relation between Ecc and intermediate types. Some ornamentals e. g. :Maranta arundinacea, Gomphrena g Lobosa , Aloe vera , Speirantha gardenii, Hosta plautaginea, Polygonatum sibiricum , Disporurn sp. , Paphiopedilum , Amomum villosum were the new hosts of soft rot Erwinia.更多还原