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Dr. Rasha Yehya Abdel-gaffar Mohamed :: Publications:

Title:
The potential biological activities of Aspergillus luchuensis-aided green synthesis of silver nanoparticles
Authors: Rasha Y. Abd Elghaffar; Amany M. Emam ; Ehab S. Taher ; Mohamed M. Baz ; Hamada Nayel ; Ahmed Abdeen; Mohammad El-Nablaway ; Khairiah M. Alwutayd ; Ostan Mihaela; Banatean-Dunea Ioan ; Abeer A. Khattab;Rasha H. Al-Serwi ; Amira E. Sehim
Year: 2024
Keywords: endophytic fungi; biosynthetic metals; antimicrobial;antioxidant; dye degradation ; larvicidal
Journal: Frontiers in Microbiology
Volume: 15
Issue: 20 May
Pages: 1381302-1381317
Publisher: Frontiers Media SA
Local/International: International
Paper Link: Not Available
Full paper Rasha Yehya Abdel-gaffar Mohamed_paper 8.pdf
Supplementary materials Not Available
Abstract:

Biosynthetic metals have attracted global attention because of their safety, affordability, and environmental friendliness. As a consequence, the cell-free filtrate (CFF) of Dill leaf-derived endophytic fungus Aspergillus luchuensis was employed for the extracellularly synthesis silver nanoparticles (AgNPs). A reddish-brown color shift confirmed that AgNPs were successfully produced. The obtained AgNPs were characterized by UV–Vis (ultraviolet–visible spectroscopy), Transmission electron microscopy (TEM), FTIR, EDX, and zeta potential. Results demonstrated the creation of crystalline AgNPs with a spherical shape at 427.81 nm in the UV–Vis spectrum, and size ranged from 16 to 18 nm as observed by TEM. Additionally, the biogenic AgNPs had a promising antibacterial activity versus multidrug-resistant bacteria, notably, S. aureus, E. coli, and S. typhi. The highest growth reduction was recorded in the case of E. coli. Furthermore, the biosynthesized AgNPs demonstrated potent antifungal potential versus a variety of harmful fungi. The maximum growth inhibition was evaluated from A. brasinsilles, followed by C. albicans as compared to cell-free extract and AgNO3. In addition, data revealed that AgNPs possess powerful antioxidant activity, and their ability to scavenge radicals increased from33.0 to 85.1% with an increment in their concentration from 3.9 to 1,000 μg/ mL. Furthermore, data showed that AgNPs displayed high catalytic activity of safranin under light irradiation. The maximum decolorization percentage100%)) was observed after 6 h. Besides, the biosynthesized AgNPs showed high insecticidal potential against 3rd larval instar of Culex pipiens. Taken together, data suggested that endophytic fungus, A. luchuensis, is an attractive candidate as an environmentally sustainable and friendly fungal nanofactory.

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