Silver nanoparticles enhance chilli resistance against Colletotrichum capsici through dual antifungal and immunity-inducing mechanisms

文献类型： 外文期刊

第一作者： Muhae-Ud-Din, Ghulam

作者： Muhae-Ud-Din, Ghulam;Khaskheli, Maqsood Ahmed;Nizamani, Mir Muhammad;Wang, Yong;Jabran, Muhammad;Abid, Rimsha;Geng, Guang-Dong;Smagghe, Guy;Smagghe, Guy

作者机构：

关键词： antifungal activity; biomolecules; C. capsici; chilli; immunity; minerals; nanofungicides; silver nanoparticles

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：3.8； 五年影响因子：4.3 ）

ISSN： 1526-498X

年卷期： 2025 年

页码：

收录情况： SCI

摘要： BACKGROUNDConventional pesticides pollute the environment by contaminating water reservoirs with harmful residues. This study investigated the potential of silver nanoparticles (AgNPs) to treat Colletotrichum capsici-induced anthracnose disease in chilli plants. By leveraging the unique chemical and physical characteristics of AgNPs, we evaluated their antifungal efficacy and their roles in boosting plant immunity.RESULTSAgNPs-treated plants exhibited increased expression of defense-related genes and elevated levels of flavonoids, phenolics, defense enzymes, and biomolecules, along with improved callose deposition and membrane permeability, which provided enhanced cellular protection. Morphological and physiological analyses indicated superior growth under biotic stress, with higher concentrations of minerals, glycine betaine, and free amino acids in AgNPs-treated plants. Confocal microscopy revealed the absence of fungal hyphae in the AgNPs-treated samples in contrast to the pathogen-inoculated group. The AgNPs synthesized in this study had spherical structures with mean dimensions of 15-20 nm, as confirmed by TEM and SEM imaging. Growth inhibition of C. capsici was concentration-dependent, with 75-90 mu g/mL of AgNPs showing significant colony size reduction. Additionally, AgNPs treatment reduced disease index by 40% compared to 79% in untreated controls. Enhanced mycelial cell membrane permeability and elevated expression of defense genes such as CaPDF 1.2, and CaPR-5 were also observed.CONCLUSIONThese results emphasize the potential of AgNPs as a sustainable substitute for conventional pesticides, improving chilli plant immunity and nutrients, while mitigating anthracnose disease. This study highlights the importance of nanotechnology in sustainable agriculture and offers a promising approach for future crop protection and food security. (c) 2025 Society of Chemical Industry.

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