山东桃树流胶病病原菌研究

Studies on the pathogen of peach gummosis in Shandong province

流胶病为山东桃树生产上的主要病害,发生普遍,危害严重。关于桃树流胶病的病原,国外、国内报道不一。病原真菌的鉴定通常采用传统形态学的方法,存在一定的局限性。为了明确山东省桃树流胶病的病因,2007-2009年应用rDNA-ITS序列测定分析和传统真菌形态学鉴定相结合的方法,对从不同产地分离获得的能引起桃树流胶病的致病菌进行鉴定。结果表明,引起山东桃树流胶病病原菌主要为葡萄座腔菌(Botryosphaeriadothidea(Moug.exFr.)Ces et de Not)。该病原菌rDNA-ITS区序列已在GenBank上登录(GenBank登录号:GU933645)。伤口和皮孔是病原菌田间主要的侵染途径。为山东桃树流胶病的防治研究及抗病品种选育研究奠定了基础。

Peach gummosis has become a major disease in peach production in Shandong province. With regard to the pathogen of peach gummosis , there were different reports at home and abroad. The method of morphological characters had certain restriction, which was used to identify pathogenic fungus. Based on the traditional pathogenicity test （ morphological characteristics） and the sequence of ribosomal DNA -ITS, the pathogen eausing peaeh gummosis in Shandong province was identified as Botryosphax, ria dothMea （Moug. ex Fr.） Ces et de Not. The ribosomal DNA -ITS sequence data of the pathogenic fungus had been subnfitted to GenBank （GenBank accession number： GU933645）. Wound and lentieels were the pathways for the infection. The key points for future research were suggested as well.