Abstract
The antibacterial activities of silver (Ag) and copper (Cu) monometallic and bimetallic nanoparticles (MNPs and BNPs) against the most economically important and common plant bacterial diseases in Kyrgyzstan were tested, as well as their phytotoxic effects on wheat and corn seeds. To achieve this, a range of Ag and Cu MNPs and BNPs were synthesized using different methods and were tested at different concentrations to compare their biological effects. The antibacterial activities of Ag and Cu MNPs and Ag‐Cu BNPs against the plant pathogenic bacteria Erwinia amylovora, Pseudomonas syringae, and Pectobacterium carotovorum were evaluated. Of the three pathogens, Ps. syringae was found to be the most sensitive to NPs. The antimicrobial activities of the tested NPs showed significant positive correlations with the concentration; hence, there was a dose‐dependent effect. Due to their antibacterial properties, these Ag‐Cu nanocomposites have high potential in plant protection applications.
Highlights
IntroductionNew materials (i.e., nanopowders, nanocomposites, and nanofibres) less than 100 nm in at least one dimension have been developed in the last decades
It has been shown that the antibacterial activity is due to Ag + ions, not metallic Ag [13]
This research is aimed at studying the biological activity of monometallic NPs (MNPs) (Ag and Cu) and Bimetallic NPs (BNPs) (Ag-Cu) against the most economically important and common plant bacterial diseases in Kyrgyzstan and the phytotoxic effect on wheat and corn seeds
Summary
New materials (i.e., nanopowders, nanocomposites, and nanofibres) less than 100 nm in at least one dimension have been developed in the last decades. Due to their quantum size and a significant increase in the proportion of surface atoms compared to bulk materials, nanocomposites have unusual biological properties [1–3]. Their antimicrobial properties allow them to be used in various human and industrial applications. The antimicrobial mechanisms of nanoparticles (NPs) are based on their penetrability, small size, chemical toxicity, and ability to damage the bacterial cell membrane and produce reactive oxygen species (considered the primary mechanism of action) [4, 5]. It has been shown that the antibacterial activity is due to Ag + ions, not metallic Ag [13]
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