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中国农学通报 ›› 2024, Vol. 40 ›› Issue (12): 119-125.doi: 10.11924/j.issn.1000-6850.casb2023-0314

所属专题: 植物保护

• 植物保护·农药 • 上一篇    下一篇

鱼腥草叶斑病及茎斑病病原菌的分离与鉴定

张重梅1(), 谢杰1, 张蕾1, 杨潇湘1, 黄小琴1, 邓越1, 胡孜进1, 余垚颖1, 鲜赟曦1, 马凡2, 刘勇1()   

  1. 1 四川省农业科学院植物保护研究所,农业农村部西南作物有害生物综合治理重点实验室,成都 610066
    2 武胜县农业农村局,四川武胜 638400
  • 收稿日期:2023-04-27 修回日期:2023-07-15 出版日期:2024-04-25 发布日期:2024-04-22
  • 通讯作者:
    刘勇,男,1964年出生,重庆潼南人,研究员,博士,主要从事植物病理学研究。通信地址:610066 四川省成都市锦江区静居寺20号四川省农业科学院植物保护研究所,Tel:028-84504089,E-mail:
  • 作者简介:

    张重梅,女,1983年出生,湖北鹤峰人,助理研究员,硕士,主要从事植物病害及生物防治研究。通信地址:610066 四川省成都市锦江区静居寺路20号 四川省农业科学院植物保护研究所,Tel:028-84504089,E-mail:

The Pathogen Causing Leaf and Stem Spot of Houttuynia cordata: Isolation and Identification

ZHANG Zhongmei1(), XIE Jie1, ZHANG Lei1, YANG Xiaoxiang1, HUANG Xiaoqin1, DENG Yue1, HU Zijin1, YU Yaoying1, XIAN Yunxi1, MA Fan2, LIU Yong1()   

  1. 1 Institute of Plant Protection, Sichuan Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management in Southwest Agriculture Crops, Ministry of Agriculture and Rural Affairs, Chengdu 610066
    2 Agriculture and Rural Bureau of Wusheng County, Wusheng, Sichuan 638400
  • Received:2023-04-27 Revised:2023-07-15 Published:2024-04-25 Online:2024-04-22

摘要:

为了明确引起四川省广汉市鱼腥草新型叶斑及茎斑类病害的病原菌种类,为该病的科学防治提供理论依据,对采自广汉市的鱼腥草病茎叶通过组织消毒分离、离体接种、形态学观察与基于核糖体转录间隔区(ITS)、延长因子(tef1)、钙调蛋白(cal)和组蛋白(his3)基因的分子鉴定进行病原菌的分离鉴定。结果表明,病原菌菌丝呈灰白色到浅褐色,其分生孢子器可产生纺锤形到椭圆形的α型分生孢子以及丝状或钩状β型分生孢子。多基因联合系统发育分析表明,病原菌在大豆间座壳(Diaporthe sojae)和菜豆间座壳(D. phaseolorum)分枝外单独聚为一枝,并且3枝一起聚为一个大枝,因此建议成立一个新种—鱼腥草间座壳(D. houttuynia)来容纳此类病菌。结合形态学和分子鉴定结果,将引起广汉市鱼腥草新型叶斑及茎斑类病害的病原菌鉴定为鱼腥草间座壳(D. houttuynia)。

关键词: 鱼腥草, 叶斑病, 茎斑病, 分离鉴定, 鱼腥草间座壳

Abstract:

To identify the pathogen species causing a noval desease of leaf spot and stem spot of Houttuynia cordata Thunb. in Guanghan City, Sichuan Province, and provides theoretical basis for the scientific management of this disease, the leaves and stems of diseased H. cordata were collected from Guanghan City, and the pathogen was isolated and identified by tissue isolation, pathogenicity testing, morphological characterization, and molecular identification based on ITS, tef1, cal and his3 gene sequences. The results indicate that the mycelium of the pathogen is gray-white to light brown. The conidiomata, which are produced in the late growth stage, can produce two types of conidia: fusiform to oval-shaped α-type conidia and filamentous or hook-shaped β-type conidia. Multiple gene cluster analysis showed that the pathogen formed an individual branch adjacent to the Diaporthe Sojae and D. phaseolorum branches, and formed a big branch with these two branches in the phylogenetic tree, and a new species named D. houttuynia was suggested to establish to accommodate this pathogen. According to morphology and molecular identification, the pathogen causing the noval desease of leaf spot and stem spot of H. cordata in Guanghan City was identified as D. houttuynia.

Key words: Houttuynia cordata, leaf spot, stem spot, isolation and identification, Diaporthe houttuynia