太子参新病害酸腐病的病原菌鉴定

Identification of the pathogen causing a new sour-rot disease on the Pseudostellaria heterophylla

太子参(Pseudostellaria heterophylla)以块根入药,是一种名贵滋补类中药材。我国的福建、贵州、安徽等省是其主要产区。目前,国内外对其相关病害研究相对甚少,仅对叶斑病、病毒病和根腐病等病害有较全面的病原鉴定[1,2]。2018~2019年,笔者在福建省柘荣县商品参和种参收获期间,发现可造成块根腐烂且伴有发酵酸味的一种新病害。该病害在雨天扩展迅速。

Pseudostellaria heterophylla is a medicinal plant in subtropical China.During 2018-2019,a new disease caused sour rot on the tuberous roots of P.heterophylla was found at Zherong County,Fujian Province.The tuberous roots have been infected by the pathogen at the harvest period,resulting in a sour-smelling watery mass.Based on the disease symptoms,morphological characteristics and phylogenetic analysis of the rDNA-ITS sequences along with the pathogenicity tests for the represent isolates,the pathogen was identified as Geotrichum candidum.To our knowledge,this is the first report of Ge.candidum causing sour rot on the tuberous roots of P.heterophylla in China.