Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (10): 3525-3536.DOI: 10.11733/j.issn.1007-0435.2026.10.001

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Advances in Alkaloid Biosynthesis and Regulation in Grass-Endophyte Symbioses

LIANG Zheng1,2, WEI Xue-kai1,2, YAN Wei-mo1,2, WANG Jia-kun1,2, LI Chun-jie1,2,3   

  1. 1. State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems/Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou University/Engineering Research Center of Grassland Agriculture and Ministry of Education, Lanzhou University/Western Grassland Technology Innovation Center of Gansu Province/Center for Grassland Microorganisms of Lanzhou University/College of Pastoral Agriculture Science and Technology of Lanzhou University, Lanzhou, Gansu Province 730020, China;
    2. Jingtai Field Scientific Observation and Research Station of Pastoral Agriculture, Baiyin, Gansu Province 730900, China;
    3. Grassland Research Center of National Forestry and Grassland Administration, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2026-05-24 Revised:2026-07-14 Published:2026-10-10

禾草内生真菌共生体生物碱合成与调控的研究进展

梁政1,2, 魏学凯1,2, 闫伟茉1,2, 王佳坤1,2, 李春杰1,2,3   

  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/兰州大学农业农村部草牧业创新重点实验室/兰州大学草地农业教育部工程研究中心/甘肃省西部草业技术创新中心/兰州大学草地微生物研究中心/兰州大学草地农业科技学院, 甘肃 兰州 730020;
    2. 兰州大学景泰草地农业野外科学观测研究站, 甘肃 白银 730900;
    3. 中国林业科学研究院国家林业和草原局草原研究中心, 北京 100091
  • 通讯作者: 李春杰, E-mail: chunjie@lzu.edu.cn
  • 作者简介:梁政(2002-),男,汉族,河南安阳人,硕士研究生,主要从事牧草与草坪病理学方向研究,E-mail:liangzh2024@lzu.edu.cn
  • 基金资助:
    青年科学基金项目(C类)(32503291);甘肃省青年科技基金(25JRRA698)资助

Abstract: Alkaloids produced by Epichloë endophytes in grasses serve as an important chemical basis for mediating the symbiotic relationship’s insect-repellent effects and influencing the health of herbivores. Different alkaloids exhibit significant variations in their core structural scaffolds, biosynthetic pathways, tissue distribution, and biological activities. Their formation does not depend solely on the presence of biosynthetic genes, but is rather the result of the combined interactions among gene cluster composition, host genotype, and environmental conditions. This paper systematically compared the biosynthetic strategies and ecological effects of four major classes of alkaloids: peramine, ergot alkaloids, indole-diterpenes, and lolines. It further explored the multi-level regulatory mechanisms involving in alkaloid biosynthesis, including environmental factors, host signals, transcriptional regulation, and epigenetic regulation. Ultimately, this provides an important theoretical foundation for deeply understanding the functional mechanisms of the grass-endophyte symbiotic system and the agricultural applications of these alkaloids.

Key words: Grass endophyte, Epichloë, Alkaloid biosynthetic pathways, Secondary metabolism, Regulatory mechanism

摘要: 禾草Epichloë属内生真菌产生的生物碱是介导共生体抗虫效应及影响草食动物健康的重要化学基础。不同生物碱在核心骨架、合成途径、组织分布和生物活性方面具有显著差异,其形成并非单纯取决于合成基因的存在,而是基因簇组成、宿主基因型及环境条件共同作用的结果。本文系统比较了波胺、麦角碱、吲哚二萜和黑麦草碱四类主要生物碱的合成策略及其生态效应,进一步探讨了生物碱合成过程中的多层次调控机制,包括环境因子、宿主信号、转录调控与表观遗传调控等,为深入理解禾草内生真菌共生体系的功能机制及其生物碱的农业应用提供了重要的理论基础。

关键词: 禾草内生真菌共生体, Epichloë, 生物碱合成途径, 次生代谢, 调控机制

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