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<p><i>Pseudomonas savastanoi pv. glycinea</i> is the causal agent of bacterial blight in Glycine max. Seeds constitute one of the main transmission vectors of this pathogen. Therefore, treating seeds with compounds that reduce bacterial proliferation represents an appealing solution to prevent production losses. Currently, studies focus on searching for natural products from aromatic plants with antimicrobial properties as effective and environmentally prudent alternatives. This study investigates the efficacy of oregano and thyme essential oils (EOs) in treating seeds infected with <i>P.</i> s<i>avastanoi pv. glycinea</i> B076 and Pseudomonas syringae M7-C1. In a previous study, greenhouse trials were performed using only thyme oil. In this research, the same studies were made for oregano essential oil, adding <i>in vivo</i> field trials for both oils. Non-phytotoxic concentration of 0.89 mg/ml was determined for oregano. Both EOs reduced the number of bacterial cells in the seeds, as well as disease incidence and severity. Among them, thyme EO was more effective in reducing disease under both controlled and field conditions. This study demonstrates the efficacy of oregano and thyme EOs in reducing pathogenic bacteria on seeds, representing a promising natural alternative for managing these microorganisms.</p>

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The effect of oregano and thyme essential oils on Glycine max seeds infected with Pseudomonas spp. causing bacterial blight of soybean

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Jesica Paola Sotelo,
  • María Evangelina Carezzano,
  • María Fernanda Paletti Rovey,
  • Claudio Oddino,
  • Pablo Bogino,
  • María M Oliva

摘要

Pseudomonas savastanoi pv. glycinea is the causal agent of bacterial blight in Glycine max. Seeds constitute one of the main transmission vectors of this pathogen. Therefore, treating seeds with compounds that reduce bacterial proliferation represents an appealing solution to prevent production losses. Currently, studies focus on searching for natural products from aromatic plants with antimicrobial properties as effective and environmentally prudent alternatives. This study investigates the efficacy of oregano and thyme essential oils (EOs) in treating seeds infected with P. savastanoi pv. glycinea B076 and Pseudomonas syringae M7-C1. In a previous study, greenhouse trials were performed using only thyme oil. In this research, the same studies were made for oregano essential oil, adding in vivo field trials for both oils. Non-phytotoxic concentration of 0.89 mg/ml was determined for oregano. Both EOs reduced the number of bacterial cells in the seeds, as well as disease incidence and severity. Among them, thyme EO was more effective in reducing disease under both controlled and field conditions. This study demonstrates the efficacy of oregano and thyme EOs in reducing pathogenic bacteria on seeds, representing a promising natural alternative for managing these microorganisms.