浙江农业学报 ›› 2020, Vol. 32 ›› Issue (11): 2009-2019.DOI: 10.3969/j.issn.1004-1524.2020.11.11

• 植物保护 • 上一篇    下一篇

三叶青炭疽病病原菌的鉴定与生物学特性

李戌清a, 严建立b,*, 阮松林c   

  1. 杭州市农业科学研究院 a. 蔬菜研究所;
    b.科技处;
    c.农作物(生态)研究所,浙江 杭州 310024
  • 收稿日期:2020-05-15 出版日期:2020-11-25 发布日期:2020-12-02
  • 通讯作者: * 严建立,E-mail: yjl7784@163.com
  • 作者简介:李戌清(1982—),女,山西原平人,博士,高级农艺师,主要从事植物病害研究。E-mail: xq_li@126.com
  • 基金资助:
    杭州市科委主动设计项目(20190101A05)

Identification and biological characteristics of anthracnose pathogen on Tetrastigma hemsleyanum

LI Xuqinga, YAN Jianlib,*, RUAN Songlinc   

  1. a. Institute of Vegetable;
    b. Branch of Science and Technology;
    c. Institute of Crop (Ecology), Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China
  • Received:2020-05-15 Online:2020-11-25 Published:2020-12-02

摘要: 浙江省淳安县三叶青叶部病害发生危害严重,对当地三叶青生产造成了巨大的经济损失;明确其病原菌种类与生物学特性,可为病害的有效防控提供理论依据。采用常规组织分离法对病原菌进行分离,利用病原菌形态学、分子系统学(rDNA-ITSβ-tubulinACTgpdCaM基因的PCR扩增、序列分析和系统发育树的构建)和致病性测定相结合的方法,将为害三叶青的病原菌鉴定为胶孢炭疽菌(Colletotrichum gloeosporioides);并采用十字交叉法和血球计数板计数法对该菌的生物学特性进行了研究。结果表明:菌株CA-2在20~35 ℃均能生长,最适菌丝生长和产孢的温度均为25 ℃;24 h暗培养最利于菌丝生长和产孢;培养基pH为5.0最利于菌丝生长,而pH为8.0最利于产孢。菌株CA-2能利用多种碳、氮源营养,但存在一定的差异;其中,菌丝在以麦芽糖和山梨醇为碳源、牛肉浸膏为氮源的培养基上生长最快,在以乙醇为碳源、谷氨酰胺为氮源的培养基上最慢;产孢量在以山梨醇为碳源、酵母膏为氮源的培养基上最大,在以甘露醇为碳源、胰蛋白胨为氮源的培养基上最少。

关键词: 三叶青, 炭疽病, 胶孢炭疽菌, 病原菌鉴定, 生物学特性

Abstract: Leaf spot occurred severely in Chun'an city, Zhejiang Province, and caused serious economic losses in local Tetrastigma hemsleyanum production. To clarify the species and biological characteristics of the pathogen caused leaf spot could provide scientific data for the disease effective control. The pathogen was isolated by plate confrontation assay and identified as Colletotrichum gloeosporioides based on combination of morphological characters, molecular data (rDNA-ITS, β-tubulin, ACT, gpd, CaM)and pathogenicity tests. And the biological characteristics determined by crossing and haemocytometer methods showed that the fungus was able to grow at temperature between 20-35 ℃ with an optimum of 25 ℃ for both mycelia growth and sporulation; the continuous darkness was good for both mycelia growth and sporulation; In addition, the optimal pH for mycelia growth and sporulation was 5.0 and 8.0, respectively.There were various kinds of carbohydrates and nitrogen known to provide growth of the fungus. Maltose,sorbitol and yeast were the best carbon and nitrogen source for mycelia growth, respectively, while ethanol and glutamine were the worst, respectively. Sorbitol and yeast were the best carbon and nitrogen source for sporulation, respectively, while mannitol and casein tryptone were the worst, respectively.

Key words: Tetrastigma hemsleyanum, anthracnose, Colletotrichum gloeosporioides, identification of pathogen, biological characteristics

中图分类号: