植物保护2025，Vol.51Issue(4)：72-80,9.DOI:10.16688/j.zwbh.2024481
5种植物精油对稻曲病菌的抑菌活性比较及薰衣草精油抑菌机制分析
Inhibitory activity of five plant essential oils against Ustilaginoidea virens and mechanistic analysis of lavender essential oil
摘要
Abstract
The antifungal activities of five plant essential oils(PEOs)against Ustilaginoidea virens,the pathogen responsible for rice false smut,were evaluated using the mycelial growth rate method.The median effective concentration(EC50)for each PEO was determined to identify the most effective essential oil.The results showed that lavender essential oil(LEO)exhibited the strongest antifungal activity,with an EC50 value of 0.249 mg/mL.Biochemical assays revealed that LEO significantly reduced the activities of Na+K+-ATPase,succinate dehydrogenase(SDHase)and NAD-dependent malate enzyme(NAD-MDHase)in U.virens cells,and decreased ergosterol content in the fungal cell membrane.Transcriptomic analysis further showed that LEO treatment altered the expression of 20 transcription factors and affected key regulatory genes involved in glucose,amino acid and nucleic acid metabolism pathways.These results suggest that LEO inhibits U.virens growth by disrupting energy metabolism,impairing membrane integrity,and interfering with critical metabolic pathways at the transcriptional level.The study provides a theoretical basis for the application of LEO in the biological control of rice false smut.关键词
薰衣草精油/稻曲病菌/抑菌机制/转录组分析/代谢途径Key words
lavender essential oil/Ustilaginoidea virens/antifungal mechanism/transcriptome analysis/metabolic pathways分类
农业科技引用本文复制引用
伏荣桃,陈诚,王剑,赵黎宇,陈宇,卢代华..5种植物精油对稻曲病菌的抑菌活性比较及薰衣草精油抑菌机制分析[J].植物保护,2025,51(4):72-80,9.基金项目
四川省农业科学院植物保护研究所现代植保科技探索创新专项(2025TSCX01) （2025TSCX01）
四川水稻创新团队项目(SCCXTD-2024-SD-8) （SCCXTD-2024-SD-8）
