草地学报 ›› 2025, Vol. 33 ›› Issue (8): 2423-2432.DOI: 10.11733/j.issn.1007-0435.2025.08.002

• 研究论文 • 上一篇    下一篇

感离蠕孢叶斑病多花黑麦草叶际微生物群落结构与多样性分析

龙嘉惠1, 许玲玲1,2, 张哲1, 崔华嵬1, 刘佳奇1,2, 薛龙海1   

  1. 1. 兰州大学草种创新与草地农业生态系统全国重点实验室/草地微生物研究中心/草地农业科技学院, 甘肃 兰州 730020;
    2. 中国林业科学研究院生态保护与修复研究所/国家林业和草原局草原研究中心, 北京 100091
  • 收稿日期:2024-10-23 修回日期:2024-11-24 出版日期:2025-08-15 发布日期:2025-08-27
  • 通讯作者: 薛龙海, E-mail:xuelonghai55@126.com
  • 作者简介:龙嘉惠(2001-),女,汉族,湖南娄底人,硕士研究生,主要从事生态学及草原植物病理学研究;E-mail:longjh2023@lzu.edu.cn
  • 基金资助:
    兰州大学“双一流”科研启动费项目(561120201);国家农业产业技术体系(CARS-34)资助

Structure and Diversity Analysis of the Phyllosphere Microbial Community on Leaf Spot Disease of Lolium multiflorum Caused by Bipolaris sorokiniana

LONG Jia-hui1, XU Ling-ling1,2, ZHANG Zhe1, CUI Hua-wei1, LIU Jia-qi1,2, XUE Long-hai1   

  1. 1. State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Center for Grassland Microbiome; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730020, China;
    2. Grassland Research Center of National Forestry and Grassland Administration, Institute of Ecological Protection and Restoration, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2024-10-23 Revised:2024-11-24 Online:2025-08-15 Published:2025-08-27

摘要: 为探究多花黑麦草(Lolium multiflorum)感染离蠕孢(Bipolaris sorokiniana)叶斑病后叶际微生物群落结构和多样性的变化,本研究通过人工接种离蠕孢孢子悬浮液的方法制备离蠕孢叶斑病多花黑麦草,收集感病与健康多花黑麦草叶片,采用高通量测序研究多花黑麦草感病后叶际微生物群落结构和多样性差异。结果表明叶际群落结构差异显著,病叶叶际真菌、细菌的物种丰富度及多样性高于健康叶片。感病后叶际优势细菌门为变形菌门,优势真菌门为子囊菌门。功能预测发现多花黑麦草感病后的潜在致病性表型显著增加,其中变形菌门对致病性表型贡献较大,并且变形菌门在各组中的丰度差异与致病性表型变化趋势一致。本研究为植物叶际微生物对病原菌感染的响应机制提供理论依据。

关键词: 多花黑麦草, 离蠕孢叶斑病, 叶际微生物群落, 多样性, 高通量测序

Abstract: To investigate the changes of the structure and diversity of the phyllosphere microbial community after infection of Italian ryegrass (Lolium multiflorum) with Bipolaris sorokiniana, this study was conducted by artificially inoculating Italian ryegrass with B. sorokiniana spore suspension and collecting leaves of infected and healthy Italian ryegrass. High-throughput sequencing was used to investigate differences in the structure and diversity of the phyllosphere microbial community. Results showed that there were significant differences in phyllosphere microbial community structure, and the species richness and diversity of phyllosphere fungi and phyllosphere bacteria were higher in infected leaves than in healthy leaves. The dominant bacterial phylum was Proteobacteria and the dominant fungal phylum was Ascomycota. Functional prediction revealed a significant increase in potential pathogenic phenotypes following the infection of Italian ryegrass, with the Proteobacteria contributing substantially to the pathogenic phenotypes. Differences in abundance of Proteobacteria across groups were consistent with trends in pathogenicity phenotypes. This study provides a theoretical basis for the mechanism of plant phyllosphere microbial community responses to pathogen infection.

Key words: Lolium multiflorum, Bipolaris sorokiniana, Phyllosphere microbial community, Diversity, High-throughput Sequencing

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