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<p>The root system of crops is fundamental to plant growth, directly influencing their development and yield. In this study, a series of arylurea derivatives were designed and synthesized, with the aim of screening small molecules that have the potential to promote root length. Preliminary biological evaluations revealed that compound <b>B25</b>, at a concentration of 5 µM, significantly promoted root length in rice, wheat, and maize, and contributed to increased dry weight. Preliminary mechanism of action suggests that <b>B25</b> exhibits auxin-like physiological activity, with a binding free energy of -7.3&#xa0;kcal/mol with the auxin receptor TIR1, demonstrating higher affinity than the control naphthylacetic acid (NAA). Compound <b>B25</b> may act as a potential auxin receptor agonist by interacting with amino acid residues such as HIS78, IHP701, ARG403, NIA801, and ASP81. Additionally, preliminary biological testing and herbicidal activity assays indicate that compound <b>B23</b>, at 100 µM, exhibits stronger herbicidal activity against <i>Amaranthus retroflexus</i> and <i>Bidens pilosa</i> compared to the control herbicide clopyralid (Clo), and shows strong binding affinity for TIR1, suggesting its potential as an auxin-like herbicide.</p>

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Design, Synthesis and Biological Activity of Pyridine-Containing Aryl Urea Derivatives

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Ali Dai,
  • You Mo,
  • Junyan Xu,
  • Xiong Zhang,
  • Yimin Ding,
  • Liusheng Duan,
  • Weiming Tan

摘要

The root system of crops is fundamental to plant growth, directly influencing their development and yield. In this study, a series of arylurea derivatives were designed and synthesized, with the aim of screening small molecules that have the potential to promote root length. Preliminary biological evaluations revealed that compound B25, at a concentration of 5 µM, significantly promoted root length in rice, wheat, and maize, and contributed to increased dry weight. Preliminary mechanism of action suggests that B25 exhibits auxin-like physiological activity, with a binding free energy of -7.3 kcal/mol with the auxin receptor TIR1, demonstrating higher affinity than the control naphthylacetic acid (NAA). Compound B25 may act as a potential auxin receptor agonist by interacting with amino acid residues such as HIS78, IHP701, ARG403, NIA801, and ASP81. Additionally, preliminary biological testing and herbicidal activity assays indicate that compound B23, at 100 µM, exhibits stronger herbicidal activity against Amaranthus retroflexus and Bidens pilosa compared to the control herbicide clopyralid (Clo), and shows strong binding affinity for TIR1, suggesting its potential as an auxin-like herbicide.