Broad-spectrum nano-bactericide utilizing antimicrobial peptides and bimetallic Cu-Ag nanoparticles anchored onto multiwalled carbon nanotubes for sustained protection against persistent bacterial pathogens in crops
文献类型： 外文期刊
作者： Ning, Weimin 1 ; Luo, Xiangwen 2 ; Zhang, Yu 2 ; Tian, Peijie 3 ; Xiao, Youlun 2 ; Li, Shijun 2 ; Yang, Xiao 1 ; Li, Fan 3 ; Zhang, Deyong 1 ; Zhang, Songbai 1 ; Liu, Yong 1 ;
作者机构： 1.Hunan Univ, Biol Coll, Longping Branch, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, Key Lab Pest Management Hort Crop Hunan Prov, Changsha 410125, Peoples R China
3.Yunnan Agr Univ, Plant Protect Coll, Kunming 650000, Peoples R China
关键词： Bimetallic/small antimicrobial peptide; nanoparticles; Antibacterial activity; Bacterial pathogens
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）
ISSN： 0141-8130
年卷期： 2024 年 265 卷
页码：
收录情况： SCI
摘要： Worldwide crop yields are threatened by persistent pathogenic bacteria that cause significant damage and jeopardize global food security. Chemical pesticides have shown limited effectiveness in protecting crops from severe yield loss. To address this obstacle, there is a growing need to develop environmentally friendly bactericides with broad-spectrum and sustained protection against persistent crop pathogens. Here, we present a method for preparing a nanocomposite that combines antimicrobial peptides (AMPs) and bimetallic Cu-Ag nanoparticles anchored onto multiwalled carbon nanotubes (MWCNTs). The nanocomposite exhibited dual antibacterial activity by disrupting bacterial cell membranes and splicing nucleic acids. By functionalizing MWCNTs with small AMPs (sAMPs), we achieved enhanced stability and penetration of the nanocomposite, and improved loading capacity of the Cu-Ag nanoparticles. The synthesized MWCNTs&CuNCs@AgNPs@P nanocomposites demonstrated broad-spectrum lethality against both Gram-positive and Gram-negative bacterial pathogens. Glasshouse pot trials confirmed the efficacy of the nanocomposites in protecting rice crops against bacterial leaf blight and tomato crops against bacterial wilt. These findings highlight the excellent antibacterial properties of the MWCNTs&CuNCs@AgNPs@P nanocomposite and its potential to replace chemical pesticides, offering significant advantages for agricultural applications.
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