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<p>This study evaluated the effects of low-dose electron beam irradiation (EBI) at 50, 100, and 150&#xa0;Gy on the membrane characteristics, growth, and antimicrobial activity of the One Health probiotic strain <i>Lactiplantibacillus plantarum</i> ZPZ. Findings were compared with those of <i>Lactobacillus acidophilus</i> DDS®-1 to assess strain-specific responses. Results indicated a dose-dependent reduction in growth, with untreated <i>Lpb. plantarum</i> ZPZ cultures averaged 1.26 × 10<sup>7</sup> CFU/mL, decreasing to 1.45 × 10<sup>6</sup> CFU/mL at 150&#xa0;Gy (<i>P</i> &lt; 0.05). Antimicrobial efficacy also decreased from 0.16 in untreated samples to 0.31 in samples treated with 150&#xa0;Gy (<i>P</i> &lt; 0.05, OD<sub>600</sub>). While surface hydrophobicity was initially reduced by 50&#xa0;Gy treatment, it was restored by 150&#xa0;Gy treatment, which correlated with an 82.7% increase in biofilm formation (<i>r</i> = 0.67). The obtained results show that EBI modulates the functional properties of <i>Lpb. plantarum</i> ZPZ and therefore indicates the possibility of its application in food safety and One Health strategies. Further studies are needed to elucidate the underlying molecular mechanisms.</p>

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Impact of Low-Dose Electron Beam Irradiation on Growth, Surface Properties and Antimicrobial Activity of Lactiplantibacillus Plantarum ZPZ

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Anahit Manvelyan,
  • Bagrat Grigoryan,
  • Michael Leonidas Chikindas,
  • Svetoslav Dimitrov Todorov,
  • Astghik Pepoyan

摘要

This study evaluated the effects of low-dose electron beam irradiation (EBI) at 50, 100, and 150 Gy on the membrane characteristics, growth, and antimicrobial activity of the One Health probiotic strain Lactiplantibacillus plantarum ZPZ. Findings were compared with those of Lactobacillus acidophilus DDS®-1 to assess strain-specific responses. Results indicated a dose-dependent reduction in growth, with untreated Lpb. plantarum ZPZ cultures averaged 1.26 × 107 CFU/mL, decreasing to 1.45 × 106 CFU/mL at 150 Gy (P < 0.05). Antimicrobial efficacy also decreased from 0.16 in untreated samples to 0.31 in samples treated with 150 Gy (P < 0.05, OD600). While surface hydrophobicity was initially reduced by 50 Gy treatment, it was restored by 150 Gy treatment, which correlated with an 82.7% increase in biofilm formation (r = 0.67). The obtained results show that EBI modulates the functional properties of Lpb. plantarum ZPZ and therefore indicates the possibility of its application in food safety and One Health strategies. Further studies are needed to elucidate the underlying molecular mechanisms.