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<p>The phytopathogenic bacterium <i>Ralstonia solanacearum</i>, the causal agent of bacterial wilt, represents a&#xa0;significant threat to economically important crops such as bananas. This study determined the antagonism of copper nanoparticles (CuNPs) under <i>in vitro</i> conditions towards <i>R.&#xa0;solanacearum</i> and its antimicrobial activity in banana plants. A&#xa0;controlled greenhouse experiment was conducted, where banana seedlings were treated with different concentrations of CuNPs (i.e. 0,&#xa0;10, 20, 30, 40, and 50 ppm). Disease incidence and severity, microbial counts, and the impact of CuNPs on seedling growth and root mass were measured. The results indicated a&#xa0;significant inverse relationship between CuNPs concentration and disease incidence, and the highest reduction in microbial counts and disease severity were observed at the highest concentration (i.e. 50 ppm) of CuNPs. CuNPs proved to be an effective alternative to conventional bactericides in managing bacterial wilt in bananas, thereby promoting more sustainable and environmentally friendly agricultural practices. Additionally, CuNPs improved seedling growth and root mass, suggesting further benefits for crop health and productivity. These findings highlight the potential of CuNPs to be integrated into plant disease management strategies, contributing to the development of more robust and competitive agriculture.</p> Graphic abstract <p></p>

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Antibacterial Activity of Copper Nanoparticles Against the Phytopathogenic Bacterium Ralstonia solanacearum

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • Angel Virgilio Cedeño-Moreira,
  • Hayron Fabricio Canchignia-Martínez,
  • Ketty Vanessa Arellano-Ibarra,
  • Cristhian John Macias-Holguín,
  • Kenyi Janina Suarez-Romero,
  • Naga Raju Maddela

摘要

The phytopathogenic bacterium Ralstonia solanacearum, the causal agent of bacterial wilt, represents a significant threat to economically important crops such as bananas. This study determined the antagonism of copper nanoparticles (CuNPs) under in vitro conditions towards R. solanacearum and its antimicrobial activity in banana plants. A controlled greenhouse experiment was conducted, where banana seedlings were treated with different concentrations of CuNPs (i.e. 0, 10, 20, 30, 40, and 50 ppm). Disease incidence and severity, microbial counts, and the impact of CuNPs on seedling growth and root mass were measured. The results indicated a significant inverse relationship between CuNPs concentration and disease incidence, and the highest reduction in microbial counts and disease severity were observed at the highest concentration (i.e. 50 ppm) of CuNPs. CuNPs proved to be an effective alternative to conventional bactericides in managing bacterial wilt in bananas, thereby promoting more sustainable and environmentally friendly agricultural practices. Additionally, CuNPs improved seedling growth and root mass, suggesting further benefits for crop health and productivity. These findings highlight the potential of CuNPs to be integrated into plant disease management strategies, contributing to the development of more robust and competitive agriculture.

Graphic abstract