红树植物—白骨壤黑斑病病原菌的分离与鉴定

<正>红树林是生长在热带、亚热带海岸潮间带,可海陆两栖的特殊木本植物群落,具有防风御浪、净化环境、维护沿海湿地生物多样性等生态功能,为珍稀植物群落。有报道认为红树植物生长在海边又富含抗菌等活性物质,不利于病害发生,但近年来本实验室在广东雷州半岛等地红树林发现有多种病害发生~(1,2]),仅白骨壤(Avicennia marina)上就发现有黑茎病、灰斑病等病害。2014年我们在该区白骨壤小苗

Isolation and identification of the pathogen causing black spot on Avicennia marina

In 2014, a disease of black spot was found on leaves of Avicennia marina (one of the mangroves) in Donghai island of Zhanjiang, Guangdong Province. By the method of pathogen-containing tissue isolation and pathogenicity test, we obtained a pathogenic isolate bgr1. Based on morphological characteristics and sequence analysis of rDNA-ITS and glyceraldehyde-3-phosphate dehydrogenase (gpd) gene, the isolate was identified as Stemphylium lycopersici. This is the first report of leaf black spot on Avicennia marina in China.