Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (1): 40-49.DOI: 10.11733/j.issn.1007-0435.2023.01.005

Previous Articles     Next Articles

Isolation,Identification and Pathogenicity Analysis of Helminthosporioid Fungi from Silage Maize

QI He-xing1, WANG Hai-chun2, LU Guang-xin1, LI Zong-ren1, TIAN Feng1, HE Chen-bang3, XU Cheng-ti4, ZOU Hai-tao1, LEI Sheng-yan1, LI Hong-fang1, TANG Hai-peng1   

  1. 1. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai Province 810016, China;
    2. Head Station of Grassland of Qinghai Province, Xining, Qinghai Province 810001, China;
    3. Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, Qinghai Province 810016, China;
    4. Institute of Animal Husbandry and Veterinary Sciences,Qinghai University, Xining, Qinghai Province 810016, China
  • Received:2022-10-13 Revised:2022-11-13 Online:2023-01-15 Published:2023-02-07

青贮玉米蠕形菌的分离鉴定及其致病性分析

祁鹤兴1, 王海春2, 芦光新1, 李宗仁1, 田丰1, 贺晨邦3, 徐成体4, 邹海涛1, 雷生妍1, 李红芳1, 唐海鹏1   

  1. 1. 青海大学农牧学院, 青海 西宁 810016;
    2. 青海省草原总站, 青海 西宁 810001;
    3. 青海大学农林科学院, 青海 西宁 810016;
    4. 青海大学畜牧兽医科学院, 青海 西宁 810016
  • 通讯作者: 芦光新, E-mail:lugx74@qq.com
  • 作者简介:祁鹤兴(1990-),女,青海湟中人,博士,副教授,主要从事植物病原真菌及病害生物防治研究,E-mail:qhx390495559@126.com
  • 基金资助:
    青海省饲草产业科技创新平台和小麦平台玉米功能室;2022年中央财政林业和草原生态保护恢复资金项目-青海省牧草病害种类及分布调查;青海大学2020年科研启动金(4139040111)资助

Abstract: In this study leaf spots of silage maize were suspected to be caused by Helminthosporioid fungi,and samples were collected,pathogens were isolated. We then analyzed the morphological characteristics,phylogeny of ITS-rDNA sequence and GADPH gene sequence of pathogens,and tested the pathogenicity for understanding the species of Helminthosporioid fungi pathogens from silage maize. All the 142 isolates belonged to 3 genera and 6 species.Bipolaris sorokiniana and B. zeicola were the dominant pathogens,with 77 and 48 isolates,respectively. And 9 isolates were Exserohilum turcicum. The number of Curvularia verruculosa,C. lunata and C. spicifera pathogens were 2,3 and 3,respectively. Pathogenicity tests showed that B. sorokiniana and B. zeicola could infect 8 cultivars of silage maize,and the pathogenicity on 8 cultivars of another 4 species was different. Here,we preliminary clarified the species and pathogenicity of Helminthosporioid fungi causing leaf spot disease on silage maize,and lay a foundation for disease diagnosis and comprehensive prevention.

Key words: Silage maize, Helminthosporioid, Leaf spot, Phylogeny, Pathogenicity

摘要: 本研究为初步明确引起青贮玉米(Zea Mays L.)叶斑病的蠕形菌种类,采集疑似病斑叶片样本,对病原菌进行分离纯化,形态特征观察,ITS-rDNA序列和GADPH基因序列系统发育分析及致病性测定。形态学和分子生物学鉴定结果表明分离得到的142株病原菌为3属6种真菌,其中麦根腐平脐蠕孢(Bipolaris sorokiniana)和玉米生平脐蠕孢(B. zeicola)为优势病原菌,分别为77株和48株;其次为大斑病菌(Exserohilum turcicum)9株,疣状弯孢(Curvularia verruculosa)2株,新月弯孢(C. lunata)3株,穗状弯孢(C. spicifera)3株。致病性测定发现麦根腐平脐蠕孢和玉米生平脐蠕孢对青海省8个主栽青贮玉米品种均有致病性,其余4种病原菌的致病性各有差异。本研究初步明确引起青贮玉米叶斑病的蠕形菌种类及其致病性,为后续开展病害诊断及其综合防控奠定了基础。

关键词: 青贮玉米, 蠕形菌, 叶斑病, 系统发育分析, 致病性

CLC Number: