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<p>This study investigates the herbicidal potential and mechanisms of four volatile terpenoids—1,8-cineole, citral, menthone, and geraniol—against the weeds <i>Amaranthus viridis</i> and <i>Chenopodium murale</i>. All compounds exhibited significant allelopathic effects in a dose-dependent manner. Notably, 1,8-cineole and citral strongly inhibited seed germination, shoot, and root growth, with <i>C. murale</i> showing higher sensitivity than <i>A. viridis</i>. Geraniol had the most potent effects on <i>C. murale</i> with IC<sub>50</sub> values of 2.25, 2.27, and 7.10&#xa0;mg/L for seed germination, shoot growth, and root growth, respectively. Menthone was most effective against <i>A. viridis</i> with IC<sub>50</sub> values of 31.50, 27.24, and 19.81&#xa0;mg/L for germination, shoot growth, and root growth, respectively. Molecular dynamics and Molecular Mechanics Generalized Born Surface Area (MMGBSA) studies confirmed these terpenoids as transport inhibitor response 1 (TIR1) antagonists, suggesting their potential as natural herbicides targeting auxin pathways. Further research is needed to assess their ecological impact and practical application.</p>

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Herbicidal efficacy and molecular dynamics of volatile terpenoids against Amaranthus viridis and Chenopodium murale: a dose-dependent analysis

  • 期刊论文

  • 发表日期：

    2025年7月9日

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  • Ahmed M. Abd-ElGawad,
  • Ninh The Son,
  • Nguyen Xuan Ha,
  • Abd El-Nasser G. El Gendy,
  • Yusuke Kasai,
  • Hiroshi Imagawa,
  • Abdelsamed I. Elshamy,
  • Yasser A. El-Amier

摘要

This study investigates the herbicidal potential and mechanisms of four volatile terpenoids—1,8-cineole, citral, menthone, and geraniol—against the weeds Amaranthus viridis and Chenopodium murale. All compounds exhibited significant allelopathic effects in a dose-dependent manner. Notably, 1,8-cineole and citral strongly inhibited seed germination, shoot, and root growth, with C. murale showing higher sensitivity than A. viridis. Geraniol had the most potent effects on C. murale with IC50 values of 2.25, 2.27, and 7.10 mg/L for seed germination, shoot growth, and root growth, respectively. Menthone was most effective against A. viridis with IC50 values of 31.50, 27.24, and 19.81 mg/L for germination, shoot growth, and root growth, respectively. Molecular dynamics and Molecular Mechanics Generalized Born Surface Area (MMGBSA) studies confirmed these terpenoids as transport inhibitor response 1 (TIR1) antagonists, suggesting their potential as natural herbicides targeting auxin pathways. Further research is needed to assess their ecological impact and practical application.