摘要
玉兰(Magnolia denudata Desr.)隶属于木兰科(Magnoliaceae)木兰属,别名望春花、辛夷、木兰,因其观赏价值较高而被广泛种植,是一类闻名中外的园林、庭院绿化树种[1]。然而,因栽植和管理不当,玉兰上的真菌病害也随着栽培面积的大幅增加而愈发严重,极大地影响玉兰树健康生长和景观效果[2]。目前国内针对玉兰病害的研究主要集中在叶部病害的症状描述和发病规律调查,涉及的病害主要包括细极链格孢玉兰专化型(Alternaria tenuissima f.sp.magnoliicola)引起的玉兰黑斑病[1]、玉兰炭疽菌(Colletotrchum magnoliae)引起的炭疽病、玉兰壳二孢菌(Ascochyta magnoliae)引起的壳二孢褐斑病[3]以及枯草芽孢杆菌(Bacillus subtilis)引起的细菌性黑斑病等[4],但关于玉兰枝干病害的病原鉴定和致病性测定方面的报道较少。
From 2021 to 2023,after extensive investigation,we found that a branch disease often occurred on Magnolia denudata.It causes canker on the shoots,twigs and kills the branches of M.denudata.To identify the pathogen of M.denudata shoot canker,23 samples were collected from different regions in Luoyang,Sanmenxia,Xinxiang,Xinyang and Zhengzhou,Henan Province.The potential pathogens were isolated and purified by tissue separation method,and nine fungal isolates with the same morphological characteristics were obtained.According to morphological and molecular biological characteristics,and combined with the detection of pathogenicity to complete the verification of Koch’s postulates,the pathogen causing shoot canker of M.denudate was identified as Diaporthe eres.This is the first report of D.eres causing shoot canker on M.denudata.
作者
谢雨絮
黄超林
高文凯
孙修远
任帆星
杜国兴
耿月华
郭雅双
张猛
XIE Yuxu;HUANG Chaolin;GAO Wenkai;SUN Xiuyuan;REN Fanxing;DU Guoxing;GENG Yuehua;GUO Yashuang;ZHANG Meng(College of Plant Protection,Henan Agricultural University,Zhengzhou 450046,China;Shenzhen Institute of Standards and Technology,Shenzhen 518000,China)
出处
《植物病理学报》
北大核心
2025年第5期1170-1174,共5页
Acta Phytopathologica Sinica
基金
国家自然科学基金项目(32400008)
河南省自然科学基金项目(242300420481)。
关键词
木兰属
木兰科
园林绿化树种
分离鉴定
Magnolia denudata
shoot canker
Diaporthe eres
pathogen identification
pathogenicity
