浙江农业学报 ›› 2023, Vol. 35 ›› Issue (1): 121-127.DOI: 10.3969/j.issn.1004-1524.2023.01.13

• 植物保护 • 上一篇    下一篇

华东山茶花腐病病原菌分离鉴定

普梅英(), 武自强, 张诗文, 李艳杰, 朱幼娇, 吴坤, 陈龙清, 王超()   

  1. 西南林业大学 国家林业和草原局西南风景园林工程技术研究中心,云南省功能性花卉资源及产业化技术工程研究中心,云南省森林灾害预警与控制实验室,云南 昆明 650224
  • 收稿日期:2022-04-07 出版日期:2023-01-25 发布日期:2023-02-21
  • 通讯作者: *王超,E-mail: 47188127@qq.com
  • 作者简介:普梅英(1997—),女,彝族,云南玉溪人,硕士研究生,研究方向为风景园林植物。E-mail: 670868861@qq.com
  • 基金资助:
    国家重点研发计划(2019YFD100100005);云南省教育厅科学研究基金(2021Y259);云南省教育厅科学研究基金(2021J0172);西南山地森林保育与利用教育部重点实验室开放基金(KLESWFU-202005);国家基础科学公共科学数据中心“世界山茶属植物品种数据库”(NBSDC-DB-03)

Isolation and identification of petal blight disease of Camellia japonica

PU Meiying(), WU Ziqiang, ZHANG Shiwen, LI Yanjie, ZHU Youjiao, WU Kun, CHEN Longqing, WANG Chao()   

  1. Southwest Research Center for Engineering Technology of Landscape Architecture (State Forestry and Grassland Administration), Yunnan Engineering Research Center for Functional Flower Resources and Industrialization, Key Laboratory of Forest Disaster Warning and Control in Yunnan Province, Southwest Forestry University, Kunming 650224, China
  • Received:2022-04-07 Online:2023-01-25 Published:2023-02-21

摘要:

华东山茶(Camellia japonica L.)花腐病对华东山茶的观赏性影响极其严重,为明确华东山茶花腐病的致病菌及其生物学特性,提升华东山茶花期品质和观赏价值,采用组织分离法对云南省昆明市昆明植物园华东山茶的花腐病进行病原菌分离,并进行致病性测定、形态学和分子生物学鉴定。结果表明,从华东山茶品种‘五彩’(C. japonica ‘Wucai’)的病组织中分离得到1株菌株,其在PDA培养基上为白色菌丝,培养7 d长出黑色的分生孢子;将分离菌株回接于华东山茶品种‘五彩’健康花瓣上,接种后划破的花瓣病症较为明显,花朵失色变黄褐,严重时花瓣干腐或湿腐,并且产生分生孢子,与田间的症状一致;经过多引物(ITS、LSU、β-tubulin)合并系统发育分析,分离菌株与葡萄牙拟盘多毛孢(Pestalotiopsis portugallica)聚集在同一分支。综上可知,引起华东山茶花腐病的病原菌为葡萄牙拟盘多毛孢(P. portugallica),这是葡萄牙拟盘多毛孢(P. portugallica)侵染华东山茶花朵引起华东山茶花腐病的首次报道。

关键词: 华东山茶, 花腐病, 葡萄牙拟盘多毛孢, 致病性

Abstract:

The ornamental effect of Camellia japonica petal blight disease was very serious. In order to identify the pathogenic bacteria and biological characteristics of C. japonica petal blight disease and improve the quality and ornamental value of C. japonica, and provide the basis for prevention and control. The pathogen of petal blight disease of C. japonica from Kunming Botanical Garden in Kunming City was isolated by tissue separation method, and pathogenic bacteria were identified by pathogenicity assay, morphological and molecular biological identification. One strain was isolated from the C. japonica ‘Wucai’ diseased tissue, there was white hyphae on PDA medium and had black conidia in the later stage of culturing for 7 days. when it was connected back to the healthy petals, the disease of lacing petals after inoculation was more obvious, which could cause the flowers to become yellow and brown. When it was serious, it could make the petals dry rot or wet rot, and grew mycelium, which was consistent with the symptoms in the field and conformed to the pathogenicity determination of Koch’s rule. Based on the phylogenetic analysis of multiple primers (ITS, LSU, β-tubulin), Pestalotiopsis portugallica clustered in the same clade. It was confirmed that the pathogen of petal blight disease of C. japonica was P. portugallica. This was the first report that P. portugallica infected the flowers of C. japonica and caused petal blight disease.

Key words: Camellia japonica, petal blight disease, Pestalotiopsis portugallica, pathogenicity

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