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<p>Ensuring food security is a challenge, given the growth of the world population. In this sense, developing plant growth regulators (PGR) can be strategic, given their potential to improve agricultural productivity and efficiency, contributing to a more sustainable expansion. Therefore, this study evaluated thiohydantoins derived from amino acids (TDA), acetylated and non-acetylated, as potential PGRs in lettuce, maize, wheat, and pitaya. Among the assessed TDAs, acetylated thiohydantoins derived from tryptophan (IMAT) proved to be the most promising, highlighting the importance of the acetyl group. (<i>S</i>)-IMAT increased the length of the lettuce primary root by approximately two times compared to the control (without active ingredient) or tryptophan, the starting amino acid for synthesizing the TDA under study. The primary root of lettuce seedlings increased significantly with treatment with (<i>S</i>)-IMAT (30–100&#xa0;µM). However, it was inefficient for maize and inhibited the elongation of the wheat coleoptile. In in vitro pitaya micropropagation studies, the number of shoots increased approximately two-fold and root biomass by approximately 250 and 450% compared to the control [without (<i>S</i>)-IMAT] or the auxin indole-3-butyric acid (IBA). Treatment with (<i>S</i>)-IMAT did not affect the activity of the antioxidant enzymes ascorbate peroxidase (EC 1.11.1.11), catalase (EC 1.11.1.6), and superoxide dismutase (EC 1.15.1.1). Thus, (<i>S</i>)-IMAT is a promising TDA for the development of new PGRs.</p>

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Exploring Amino Acid-Derived Thiohydantoins as Promising Plant Growth Regulators

  • 期刊论文

  • 发表日期：

    2025年7月18日

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  • Caroline Dohanik,
  • Adriane J. de Souza,
  • Breno G. F. Oliveira,
  • Victor H. Buttrós,
  • Marie G. Santiago,
  • Joyce Dória,
  • Ângelo de Fátima,
  • Luzia V. Modolo,
  • Gisele A. C. Goulart

摘要

Ensuring food security is a challenge, given the growth of the world population. In this sense, developing plant growth regulators (PGR) can be strategic, given their potential to improve agricultural productivity and efficiency, contributing to a more sustainable expansion. Therefore, this study evaluated thiohydantoins derived from amino acids (TDA), acetylated and non-acetylated, as potential PGRs in lettuce, maize, wheat, and pitaya. Among the assessed TDAs, acetylated thiohydantoins derived from tryptophan (IMAT) proved to be the most promising, highlighting the importance of the acetyl group. (S)-IMAT increased the length of the lettuce primary root by approximately two times compared to the control (without active ingredient) or tryptophan, the starting amino acid for synthesizing the TDA under study. The primary root of lettuce seedlings increased significantly with treatment with (S)-IMAT (30–100 µM). However, it was inefficient for maize and inhibited the elongation of the wheat coleoptile. In in vitro pitaya micropropagation studies, the number of shoots increased approximately two-fold and root biomass by approximately 250 and 450% compared to the control [without (S)-IMAT] or the auxin indole-3-butyric acid (IBA). Treatment with (S)-IMAT did not affect the activity of the antioxidant enzymes ascorbate peroxidase (EC 1.11.1.11), catalase (EC 1.11.1.6), and superoxide dismutase (EC 1.15.1.1). Thus, (S)-IMAT is a promising TDA for the development of new PGRs.