【摘要】 2001年以来,苏北地区每年春季杨树新造林发生大面积死亡,在死亡或濒临死亡的杨树枝干上,几乎都有溃疡病症状的病斑发生。本试验通过对杨树新造林地(I-72杨)溃疡病病组织的分离、纯化培养获得10余株菌株,经接种、发病后再分离,获得6株拟茎点霉菌株;进一步克隆并分析供试菌株核糖体DNA-ITS区域的序列,结果是分离菌株与GenBank中Phomopsis eucommiicola的ITS序列有同源性,相似性达到99%。因此将该拟茎点霉菌确定为Phomopsis eucommiicolaC.Q.Chang,Z.D.Jiang&P.K.Chi,。该病原菌侵染杨树引起杨树新造林木溃疡病是首次报道。更多还原

【Abstract】 Every spring since 2001,large areas of the new forested poplar died in north of Jiangsu Province.In poplar branches that had died or were nearly to die,there were spots similar to the symptoms of canker disease.By isolation,inoculation and re-isolating the Koch’s principle was completed and finally based on the sequence of ribosomal DNA-ITS,the pathogen was identified as Phomopsis eucommiicola C.Q.Chang,Z.D.Jiang & P.K.Chi,This paper was the first report about Phomopsis eucommiicola causing canker disease on the new poplar forestation.更多还原