湖北农业科学 ›› 2024, Vol. 63 ›› Issue (9): 84-88.doi: 10.14088/j.cnki.issn0439-8114.2024.09.015

• 植物保护 • 上一篇    下一篇

臭椿canthin-6-one对禾谷镰刀菌的抑菌作用

赵美荣, 李永春, 李春颖   

  1. 赤峰学院化学与生命科学学院,内蒙古 赤峰 024000
  • 收稿日期:2023-04-20 出版日期:2024-09-25 发布日期:2024-09-30
  • 作者简介:赵美荣(1981-),女,山东嘉祥人,副教授,博士,主要从事植物次生代谢物质开发利用研究,(电话)15047639680(电子信箱)738532543@qq.com。
  • 基金资助:
    内蒙古自治区高等学校科学研究项目(NJZY21137; NJZZ22150); 赤峰学院一流学科建设项目(CFXYYLXKB202102); 蒙东地区生物资源开发利用创新团队项目(FXYKYCXTD202008)

Antifungal effect of canthin-6-one from Ailanthus altissima on Fusarium graminearum

ZHAO Mei-rong, LI Yong-chun, LI Chun-ying   

  1. College of Chemistry and Life Science, Chifeng University, Chifeng 024000, Inner Mongolia, China
  • Received:2023-04-20 Published:2024-09-25 Online:2024-09-30

摘要: 为进一步研究臭椿(Ailanthus altissima)canthin-6-one生物碱对禾谷镰刀菌(Fusarium graminearum)的抑菌效果及其作用机制,采用微量稀释法、菌丝生长抑制法测定其抑菌活性,并通过测定胞外相对电导率、内容物释放量、丙二醛含量、过氧化氢含量以及保护酶活性,从细胞膜角度分析其抑菌作用机制。结果显示,canthin-6-one对禾谷镰刀菌具有显著的抑菌作用,其最小抑菌浓度(MIC)为8.0 μg/mL,半数有效浓度(EC50)为1.85 μg/mL。处理后的菌体胞外相对电导率和内容物释放量显著增加,同时菌体丙二醛和过氧化氢含量亦有显著升高。这表明canthin-6-one引起了禾谷镰刀菌细胞膜氧化损伤,导致膜完整性丧失及透性增强,从而抑制菌丝生长。

关键词: 臭椿(Ailanthus altissima), 禾谷镰刀菌(Fusarium graminearum), 生物碱, 抑菌作用, 细胞膜

Abstract: To further study the fungicidal effect and mechanism of canthin-6-one alkaloid from Ailanthus altissima on Fusarium graminearum, the inhibitory activity was determined by microdilution and mycelial growth inhibition methods. The antifungal mechanism of canthin-6-one was analyzed from the point of view of cell membrane by detecting the extracellular relative conductivity, content release, malondialdehyde content, hydrogen peroxide content and protective enzyme activity. The results showed that canthin-6-one had a significant inhibitory effect on Fusarium graminearum, with a minimum inhibitory concentration of 8.0 μg/mL and a half-effective concentration of 1.85 μg/mL. The extracellular relative conductivity and the content release amount of the treated mycelia were significantly increased, while malondialdehyde and hydrogen peroxide contents were also significantly elevated. It was indicated that canthin-6-one induced oxidative damage to the cell membrane of Fusarium graminearum, resulting in the loss of membrane integrity and increased permeability, thus inhibiting mycelial growth.

Key words: Ailanthus altissima, Fusarium graminearum, alkaloid, antifungal effect, cell membrane

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