引起山核桃干腐病的镰刀菌鉴定  

Identification of Fusarium oblongum causing trunk canker disease on Carya cathayensis

作　　者：金哲雄 廖薇 张闯 黄有军[1] 吴酬飞[2] 仇智灵 苏秀[1] 林海萍[1] JIN Zhexiong;LIAO Wei;ZHANG Chuang;HUANG Youjun;WU Choufei;QIU Zhiling;SU Xiu;LIN Haiping(State Key Laboratory of Subtropical Silviculture,Zhejiang A&F University,Lin'an 311300,China;College of Life Science,Huzhou University,Huzhou 313000,China;Plant quarantine station of Hangzhou Lin'an,Lin'an 311300,China)

机构地区：[1]浙江农林大学省部共建亚热带森林培育国家重点实验室,临安311300 [2]湖州师范学院生命科学学院,湖州313000 [3]杭州临安植物检疫站,临安311300

出　　处：《植物病理学报》2024年第2期443-446,共4页Acta Phytopathologica Sinica

基　　金：浙江省重点研发项目(2019C02024,2020C02005);杭州市临安区科技项目(2020A008)。

摘　　要：0 引言山核桃(Carya cathayensis)为胡桃科(Juglandaceae)山核桃属(Carya)植物,落叶乔木,是中国特有的经济树种和干果,具有较高的经济价值[1]。随着山核桃种植面积的扩大,干腐病的危害日趋严重。2021年5月,浙江省杭州市临安区的山核桃种植林出现典型的干腐病症状,严重地块发病率高达86.5%。发病初期,山核桃枝干韧皮部和木质部出现黄褐色、椭圆或类似水渍状的溃疡斑.Trunk canker disease is one of the most common diseases of Carya cathayensis,causing huge economic losses.In May 2021,typical trunk canker symptoms were observed on hickory in Lin'an City,Zhejiang Province.Three fungal isolates(ZQ3,ZQ5 and ZQ12)were obtained by tissue isolation and purified using single-spore isolation method.Species identification was performed by morphological traits and sequences analyses of internal transcribed spacers(ITS)of rDNA,TEF1-α,and LSU gene,and all the fungal isolates were identified as Fusarium oblongum.To fulfill the Koch's postulations,pathogenicity assay was carried out on phloem of the hickory stems.The all tested isolates were pathogenic to hickory,proving that F.oblongum was a pathogen inciting hickory trunk canker disease.This is the first report of F.oblongum causing trunk canker on Carya cathayensis in China.

关 键 词：干腐病 山核桃属 溃疡斑 胡桃科 经济树种 镰刀菌 浙江省杭州市 

分 类 号：S432.44[农业科学—植物病理学]