楸树炭疽病菌的分离与鉴定  

Identification of pathogen causing Catalpa bungei anthracnos

作　　者：王成彬 涂艳 姜宁 朱雅荃 薛寒 朴春根[1] 李永[1] WANG Chengbin;TU Yan;JIANG Ning;ZHU Yaquan;XUE Han;PIAO Chungen;LI Yong(Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Key Laboratory of Forest Protection of National Forestry and Grassland Administration,Beijing 100091,China)

机构地区：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林保护学重点实验室,北京100091

出　　处：《植物病理学报》2023年第4期734-738,共5页Acta Phytopathologica Sinica

基　　金：国家菌种资源库林业菌种资源分库运行维护(NMRC)。

摘　　要：楸树(Catalpa bungei)是紫葳科(Bignoniaceae)落叶大乔木,是我国长江以北重要的乡土树种,材质优良,用途广泛[1]。2019-2021年,在北京、河北、山东,研究人员发现楸树叶片上出现炭疽病症状。病斑圆形至近圆形,褐色至灰褐色,中央凹陷破裂,病斑外围具有淡黄色晕圈,多个病斑扩大在一起,导致叶片卷曲、提前落叶(图1),严重影响了该植物的观赏性和绿化应用性。Catalpa bungei is an important commercial timber and ornamental tree species widely cultivated in China.During 2019 and 2021,leaf anthracnose was observed in Beijing,Hebei and Shandong Provinces.Symptoms started as yellow-green and point-sized spots gradually enlarging to sunken brown spots,and finally the di-seased leaves became distorted and wilt.Isolates were obtained from leaf samples and identified as Colletotrichum gloeosporioides by morphology and multilocus phylogenies from combined datasets of ITS/gadph/chs/act/tub2.The assay of Koch’s postulates confirmed that C.gloeosporioides was the causal agent of this disease.To our knowledge,this is the first report of C.gloeosporioides causing leaf anthracnose of C.bungei in China.

关 键 词：MORPHOLOGY ANTHRACNOSE PHYLOGENY 

分 类 号：S432.1[农业科学—植物病理学]