数字农科院2.0

Mercaptoimidazole-capped gold nanoparticles as a potent agent against plant pathogenic fungi

文献类型： 外文期刊

作者： Xu, Tang;Hao, Wenshuai;Du, Ran;Dai, Dai;Wang, Cuixia;Li, Suhua;Lin, Carol Sze Ki;Cha, Ruitao;Yan, Jianbin;Li, Chong

作者机构：

关键词： （1-2-2）

期刊名称： JOURNAL OF MATERIALS CHEMISTRY B

ISSN： 2050-750X

年卷期： 2024 年

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Plant pathogenic fungi pose a substantial challenge to agricultural production, but the conventional fungicide-based approaches are losing importance. As agents with broad-spectrum antibacterial effects, gold nanoparticles (Au NPs) are found to have antifungal effects; however, no study has examined their application in agriculture as fungicides. Accordingly, this study investigates the activity of 2-mercaptoimidazole-capped Au NPs (MI-Au NPs) against the 'top' plant pathogenic fungi, finding that they could inhibit Magnaporthe oryzae, Botrytis cinerea, Fusarium pseudograminearum and Colletotrichum destructivum by inducing cytoplasmic leakage. Moreover, MI-Au NPs are found to protect plants from infection by B. cinerea. Specifically, pot experiments demonstrate that MI-Au NPs decrease the incidence rate of B. cinerea infection in Arabidopsis thaliana from 74.6% to 6.2% and in Solanum lycopersicum from 100% to 10.9%, outperforming those achieved by imazalil. Furthermore, the biosafety assays reveal that MI-Au NPs cannot penetrate the cuticle of plant cells or negatively influence plant growth, and it is safe to mammalian cells. In summary, the findings of this study will support the development of NP-based antifungal agents for use in agriculture. The first evidence that MI-Au NPs prevent plants from fungal infection is presented.

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