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[摘要]
目的 研究不同产地玄参内生真菌的种群结构差异。方法 通过形态和分子手段相结合的方式对来自浙江磐安、陕西安康、湖北武穴、湖南邵东、四川达州和安徽亳州共6个产地的玄参进行内生真菌的分离、鉴定及种群结构分析。结果 共分离得到3 052株内生真菌划分为153个形态型,经分子系统学分析,共划分为84个分类单元,分属于25个属,其中间座壳属、镰刀菌属、黑孢属、链格孢属、茎点霉属、棒孢属、附球菌属、枝孢属为6个产地内生真菌共有属,各产地的优势属不同。相似性分析表明,不同产地玄参内生真菌的组成结构上存在差异。Shannon-wiener多样性指数及Simpson指数分析表明浙江磐安产地玄参内生真菌多样性较高,四川达州产地的多样性稍低。结论 系统研究玄参内生真菌的多样性与群落结构,阐明内生真菌在植物组织中的分布规律,可为玄参内生真菌的开发利用提供基础资料和科学依据。
[Key word]
[Abstract]
Objective To analyze the distribution of endophytic fungi in Scrophularia ningpoensis from different habitats. Methods The endophytic fungi in S. ningpoensis from six localities (Pan'an of Zhejiang Province, Ankang of Shaanxi Province, Wuxue of Hubei Province, Shaodong of Hunan Province, Dazhou of Sichuan Province, and Bozhou of Anhui Province) were isolated, identified, and analyzed according to the morphology and ITS sequences. Results A total of 3 052 strains of endophytic fungi were isolated from S. ningpoensis in six localities. A total of 84 fungal taxa were identified according to the morphology and ITS sequences, these strains were belong to 25 genera. Thereinto Diaporthe, Fusarium, Nigrospora, Alternaria, Phoma, Corynespora, Epicoccum, and Cladosporium were common genera to S. ningpoensis from six localities, but the dominant genus was different:Fusarium was the dominant genus from Anhui, Hubei, Hunan, and Shaanxi; Alternaria was the dominant genus from Sichuan; Diaporthe was the dominant genus from Zhejiang. According to the similarity coefficient, the composition of the endophytic fungi was distinctly different between six localities. The Shannon-wiener diversity index and Simpson index of endophytic fungi in S. ningpoensis from Zhejiang were found higher than others. The diversity of endophytic fungi in S. ningpoensis from Sichuan was lower than others. Conclusion Systematic studying the diversity and community structure of endophytic fungi in S. ningpoensis and clarifying their distribution regularity in plant tissues can offer basic data and scientific basis for their development and utilization.
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[基金项目]
国家自然科学基金资助(81673528);浙江省教育厅访问工程师校企合作项目(FG2017006);浙江省教育厅一般科研项目(Y201636676)