ZHANG Tianjing,SUN Wensong,SHEN Baoyu,et al.Identification and Biological Characteristics of Root Rot Pathogen of Ligusticum jeholense[J].Northern Horticulture,2023,(14):118-124.[doi:10.11937/bfyy.20225201]
辽藁本根腐病病原菌鉴定及生物学特性
- Title:
- Identification and Biological Characteristics of Root Rot Pathogen of Ligusticum jeholense
- 文献标志码:
- A
- 摘要:
- 以具典型根腐病症状的辽藁本病根组织为试材,采用组织分离法对病原菌进行分离、纯化,依据柯赫氏法则测定其致病性,通过形态学观察结合EF-1α基因片段序列分析,明确辽藁本根腐病病原菌及其生物学特性,以期为该病的防控提供参考依据。结果表明:该病原菌为茄镰孢菌(Fusarium solani),不同培养基对辽藁本根腐病菌的生长量和菌落致密性有显著影响,在PDA培养基生长最快,7 d菌落直径达85 mm,菌落致密;病菌以蔗糖为碳源时,菌丝生长速率最快,可溶性淀粉次之,对乳糖利用较差;最适宜的氮源为牛肉浸膏,其次为尿素和硝酸钾;在20~30 ℃温度范围生长较快,最适温度为30 ℃;最适pH为6;光照处理对菌丝也有影响,在全黑暗培养条件下菌落生长最快。
- Abstract:
- Taking diseased plants with typical symptoms as test materials,pathogen isolation was carried out by means of diseased tissue isolation method.Koch′s rule was used to prove the pathogenicity of fungal strain,in order to explore the main pathogens of Ligusticum jeholense root rot disease and its biological characteristics.The results showed that based on the morphological observation and sequence analyses of translation elongation factor EF-1α, Fusarium solani was identified as the pathogen.The biological characteristics showed that different media had significant effects on the growth and mycelial density of pathogen.The suitable medium for Fusarium solani growth was PDA,the colony diameter reached 85 mm in 7 days,and the colonies were dense.The growth of mycelia with sucrose as carbon source was faster than that with soluble starch,and the ability of pathogen to utilize lactose was poor.The most suitable nitrogen source was beef extract,followed by urea and potassium nitrate.The suitable temperature for the mycelium growth was 20-30 ℃,the optimum temperature was 28-30 ℃.The optimum pH was 6.The light treatment had an influence on the growth of mycelium,suitable light condition for the mycelium growth was 24 hour continuous dark.
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备注/Memo
第一作者简介:张天静(1979-),女,本科,助理研究员,现主要从事中药材病原菌分离鉴定及病虫害防治等研究工作。Email:873613102@qq.com.责任作者:孙文松(1973-),男,本科,研究员,现主要从事中药材种质收集保护、品种选育及标准化栽培等研究工作。Email:sunwensong12@126.com.基金项目:国家中药材产业技术体系建设专项资金资助项目(CARS-21-06);辽宁省农业科学院重大科技成果培育资助项目(2020CGPY0403);辽宁省农业科学院学科建设计划资助项目(2019DD144221)。收稿日期:2022-12-23