| Autor: |
Rasulov, Bakhtiyor A., Paerhati, Paiziliya, Yarbekov, Abdurasul, Pattaeva, Mohichehra A., Sherimbetov, Anvar G., Yili, Abulimiti |
| Zdroj: |
BioNanoScience; Sep2024, Vol. 14 Issue 3, p2920-2929, 10p |
| Abstrakt: |
The widespread occurrence of phytopathogenic fungi causes significant crop losses and poses a challenge for agricultural sustainability. Traditional fungicides are often harmful to the environment and human health, necessitating the search for safer, more effective alternatives. Previous studies have shown that metal nanoparticles have potential antifungal properties, but their stability and biocompatibility remain concerns. The exopolysaccharide (EPS) produced by Azotobacter chroococcum XH2018 offers a biocompatible matrix that could stabilize these nanoparticles and enhance their antifungal efficacy. The EPS, consisting of 73.3% glucose, 26.6% galactose, and 0.1% mannose (molar ratio of Glu:Gal:Man 0.407:0.147:0.0005) was used as a stabilizing dielectric matrix and nanocarrier for the electrochemically synthesized Cu/Cu2O-NPs. Before impregnation, Cu/Cu2O-NPs consisted of 27.2% Cu-NPs and 72.8% Cu2O-NPs. After impregnation, this ratio changed to 73.7% Cu-NPs and 26.3% Cu2O-NPs. This evidence suggests that Cu2O-NPs are actively reduced in the presence of the EPS matrix, first of all because of the glucose monomer in the polysaccharide macromolecule. EPS of A. chroococcum XH2018 donates electrons to copper (I)-oxide, leading to the reduction of copper (I)-oxide to copper metal. As-biofabricated Cu/Cu2O-NPs strongly limited the formation of fungal conidia. Low concentrations of Cu/Cu2O-NPs reduced the conidia formation of Fusarium solani and Fusarium oxysporum f.sp. vasinfectum up to 85–90%, Rhizoctania solani up to 95%, and Alternaria alternata up to 80%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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