湖北农业科学 ›› 2022, Vol. 61 ›› Issue (18): 84-87.doi: 10.14088/j.cnki.issn0439-8114.2022.18.013

• 植物保护 • 上一篇    下一篇

兰州百合鳞片气培腐烂病病原菌的分离与鉴定

胡雨萌a, 曹彩霞b, 吕莉珍a, 巨秀婷a, b   

  1. 青海大学,a.农牧学院; b.高原花卉研究中心/青海省园林植物与观赏园艺研究重点实验室,西宁 810016
  • 收稿日期:2021-09-24 出版日期:2022-09-25 发布日期:2022-10-21
  • 通讯作者: 巨秀婷,女,副教授,主要从事观赏植物遗传育种研究,(电话)0971-5362782(电子信箱)juxiuting@163.com。
  • 作者简介:胡雨萌(1999-),女,江苏徐州人,在读本科生,研究方向为园艺植物栽培与繁殖,(电话)17697216588(电子信箱)1246712457@qq.com。
  • 基金资助:
    基金资助:青海省中央引导地方科技发展资金项目(2021ZY025); 青海大学农牧学院大学生科研训练项目(NKX201816)

Isolation and identification of pathogen of Lilium davidii var. unicolor scale air culture rot

HU Yu-menga, CAO Cai-xiab, LYU Li-zhena, JU Xiu-tinga, b   

  1. a. College of Agriculture and Animal Husbandry; b. Plateau Flower Research Center / Key Laboratory of Landscape Plants and Ornamental Horticulture of Qinghai Province, Qinghai University, Xining 810016,China
  • Received:2021-09-24 Online:2022-09-25 Published:2022-10-21

摘要: 为明确兰州百合(Lilium davidii var.unicolor)在气培过程中鳞片腐烂病的病原菌种类,分别采集不同的发病组织,利用组织分离法对发病组织进行分离及纯化、致病性测定,同时对分离物进行形态学鉴定及基于rDNA-ITS序列分析的分子生物学鉴定,构建系统进化树明确致病菌种类。结果表明,经分离及纯化共获得真菌菌株18株,其中4株可引起兰州百合鳞片气培腐烂病,经形态学鉴定,4株菌株属于2类镰刀菌,分别是尖孢镰刀菌(Fusarium oxysporum)和富士镰刀菌(Fusarium fujikuroi);分子生物学鉴定结果表明,4株菌株在系统进化树中与镰刀菌属的多条序列聚集在一个大的树状分支上,其中1-A-11、10-A-2与尖孢镰刀菌的多条序列相似性在99%以上,菌株10-A-1、1-B-1与富士镰刀菌的多条序列相似性在99%以上。表明引起兰州百合在气培过程中鳞片发生腐烂病的病原菌种类为尖孢镰刀菌和富士镰刀菌,2类镰刀菌的发病率分别是95%、75%。

关键词: 兰州百合(Lilium davidii var.unicolor), 鳞片腐烂病, 病原菌, 分子鉴定

Abstract: In order to identify the pathogen species of Lilium davidii var.unicolor scale rot during air culture, different diseased tissues were collected, isolated, purified and determined pathogenicity. At the same time, the isolates were identified by morphology and molecular biology based on rDNA-ITS sequence analysis, and the phylogenetic tree was constructed to identify the pathogenic bacteria species. The results showed that a total of 18 fungal strains were isolated and purified, among which 4 strains could cause air culture scale rot of Lilium davidii var. unicolor. The four strains were identified by morphology as Fusarium oxysporum and Fusarium fujikuroi, which belonged to two types of Fusarium. The results of molecular biological identification showed that the four strains clustered in a large tree-like branch with multiple sequences of Fusarium in the phylogenetic tree, among which 1-A-11 and 10-A-2 had more than 99% sequence similarity with Fusarium oxysporum, and strains 10-A-1 and 1-B-1 had more than 99% sequence similarity with Fusarium fujikuroi. It was indicated that Fusarium oxysporum and Fusarium fujikuroi were the pathogens causing the scale rot of Lilium davidii var. unicolor in the process of air culture, and the incidence of Fusarium oxysporum and Fusarium fujikuroi were 95% and 75%, respectively.

Key words: Lilium davidii var. unicolor, scales rot, pathogens, molecular identification

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