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<p>Gold nanoparticles (Au-NPs) show antagonistic potential against a wide range of pathogenic fungi. In this study, we report the antifungal potential of Au-NPs in suppressing anthracnose disease on chilli plants. The results demonstrate that 90&#xa0;mg/L of Au-NPs effectively inhibited the mycelial growth of <i>Colletotrichum capsici</i>, enhanced relative membrane permeability and reduced disease incidence in chilli pepper plants. These results were confirmed using confocal microscopy, in which Au-NPs eliminate the <i>C. capsici</i> hyphae from the pericarp cells of chilli fruits. Additionally, Au-NP treatments led to a marked increase in total phenol, chlorophyll, free amino acid, and glycine betaine compared to untreated control and <i>C. capsici</i>-infected plants. Moreover, both individual and combined treatments with Au-NPs statistically enhanced the concentrations of phosphorus, nitrogen, zinc, and potassium in the roots, leaves, and fruits. Au-NPs also improved the plant's resilience to stress by activating the expression of defense-related genes and transcription factors during <i>C. capsici</i> infection. These findings reveal that Au-NPs can serve as antifungal agents against anthracnose disease, while simultaneously enhancing plant immunity and growth.</p>

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Antifungal mechanisms and characterization of gold nanoparticles: a strategic approach to combat Colletotrichum capsici-induced anthracnose disease and enhance chilli growth

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月13日

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  • Ghulam Muhae-Ud-Din,
  • Rimsha Abid,
  • Sania Nazar,
  • Abazar Ghorbani,
  • Sagheer Atta,
  • Moxian Chen,
  • Yong Wang

摘要

Gold nanoparticles (Au-NPs) show antagonistic potential against a wide range of pathogenic fungi. In this study, we report the antifungal potential of Au-NPs in suppressing anthracnose disease on chilli plants. The results demonstrate that 90 mg/L of Au-NPs effectively inhibited the mycelial growth of Colletotrichum capsici, enhanced relative membrane permeability and reduced disease incidence in chilli pepper plants. These results were confirmed using confocal microscopy, in which Au-NPs eliminate the C. capsici hyphae from the pericarp cells of chilli fruits. Additionally, Au-NP treatments led to a marked increase in total phenol, chlorophyll, free amino acid, and glycine betaine compared to untreated control and C. capsici-infected plants. Moreover, both individual and combined treatments with Au-NPs statistically enhanced the concentrations of phosphorus, nitrogen, zinc, and potassium in the roots, leaves, and fruits. Au-NPs also improved the plant's resilience to stress by activating the expression of defense-related genes and transcription factors during C. capsici infection. These findings reveal that Au-NPs can serve as antifungal agents against anthracnose disease, while simultaneously enhancing plant immunity and growth.