| Autor: |
Pham DC; Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam., Nguyen TH; Tissue Engineering and Regenerative Medicine, Department of Biomedical Engineering, International University, Vietnam National University-HCMC (VNU-HCMC), Ho Chi Minh City 700000, Vietnam., Ngoc UTP; Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi 100000, Vietnam., Le NTT; Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi 100000, Vietnam., Tran TV; Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi 100000, Vietnam., Nguyen DH; Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi 100000, Vietnam. |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of nanoscience and nanotechnology [J Nanosci Nanotechnol] 2018 Aug 01; Vol. 18 (8), pp. 5299-5305. |
| DOI: |
10.1166/jnn.2018.15400 |
| Abstrakt: |
Rice (Oryza sativa L.) is one of the major staple food crops of nearly two-third of the world's population. However, rice blast caused by fungus Pyricularia oryzae is generally considered the most serious disease of cultivated rice worldwide due to its extensive distribution and destructiveness under favourable climatic conditions. In this report, the combination between chitosan (CS) and silver (Ag), Ag@CS, was introduced for antifungal activity against Pyricularia oryzae extracted from blast-infected leaves. In detail, Ag@CS nanoparticles (NPs) were first synthesized and further mixed with Trihexad 700 WP (Tri), Ag@CS-Tri, against the fungus by agar diffusion method. The prepared Ag@CS-Tri NPs were characterized by Fourier transform infrared (FTIR), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). In aqueous condition, Ag@CS-Tri NPs were successfully prepared and existed as spherical NPs with particle size of 17.26 ± 0.89 nm, which is an ideal size for their uptake into plant cells, indicating that the size of their parentally Ag@CS NPs is small enough to combine Tri, and their diameter is large enough to effectively penetrate the cellular membrane and kill fungi. More importantly, the antifungal property of Ag@CS-Tri NPs was significantly increased with inhibition zone around 25 nm compared with only around 12 nm of Ag@CS at the same concentration of Ag (2 ppm) and CS (4000 ppm). These results demonstrated that the synergistic effect of Tri and Ag@CS NPs can be a potential candidate with high antifungal activity for the use of antibiotics in agriculture. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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