【摘要】 系统研究和鉴定了产自中国陕西、青海、宁夏、四川、贵州、西藏、湖北、新疆等8个省区的31个小麦雪霉叶枯病菌菌系和1个产自捷克的菌系。结果表明,各菌系的培养性状和形态特征、尤其是环痕状的产孢细胞和具淀粉质顶环的子囊等均符合Gerlachia nivalis(Ces.ex Sacc.)W.Gams & E.Müll.[有性态:Monographella nivalis(Schaffn.)E.Müll.]的鉴别特征。小麦雪霉叶枯病菌对三唑酮等8种药物比镰刀菌敏感,各菌系人工接种小麦幼苗均引起相同症状,人工接种可侵染22属55种禾本科植物。确认了该菌与欧洲、北美发生的红色雪霉病病菌为同种。因此,将中国小麦雪霉叶枯病菌定名为雪腐格氏霉[Gerlachia nivalis(Ces.ex Sacc.)W.Gams & E.Müll.]。更多还原

【Abstract】 Taxonomic study on the pathogen of Gerlachia leaf blight,a new disease of wheat in China,was carried out by identifying 31 isolates collected from Shaanxi,Qinghai, Ningxia,Sichuan,Guizhou,Xizang,Hubei and Xinjiang.The cultural characteristics,mor- phology of anamorph and teleomorph,especially annellate conidiogenous cells and amyloid ascus tips,sensitivity to chemicals and host range were described and compared.The anamor- ph of the pathogen was identified as Gerlachia nivalis (Ces.ex Sacc.) W.Gams & E.Müll., and the teleomorph as Monographella nivalis (Schaffn.) E.Müll.It is verified first that the pa- thogen of Gerlachia leaf blight of wheat is conspecific to that of pink snow mould,a seedling disease of wheat in Northern Europe and Northern America.更多还原