PMID- 36985380 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230331 IS - 2076-2607 (Print) IS - 2076-2607 (Electronic) IS - 2076-2607 (Linking) VI - 11 IP - 3 DP - 2023 Mar 22 TI - Antimicrobial Activity of Green Synthesized Silver Nanoparticles Using Waste Leaves of Hyphaene thebaica (Doum Palm). LID - 10.3390/microorganisms11030807 [doi] LID - 807 AB - Silver nanoparticles (AgNPs) were biosynthesized for the first time from waste leaves extract of local doum palms in Tabuk, Saudi Arabia. The transmission electron microscope (TEM) revealed a spherical shape with a particle size from 18 to 33 nm. The d-spacing is about 2.6 A, which confirms a face-centered cubic crystalline building. The biosynthesized AgNPs were evaluated as an antimicrobial agent against several pathogenic bacteria, including Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 29213, and Pseudomonas aeruginosa ATCC 27853. The highest action was exerted against S. aureus ATCC 29213 (MIC = 1.5 microg/mL). Interestingly, AgNPs also showed anticandidal activity against the pathogenic yeasts Candida albicans ATCC 14053 (MIC = 24 microg/mL) and Candida tropicalis ATCC 13803 (MIC = 96 microg/mL). Scanning electron microscope (SEM) revealed deep morphological changes in Candida spp. due to the treatment of the AgNPs. Scarce pseudohyphae, perforation, exterior roughness, irregularly shaped cells, and production of protective exopolysaccharide (EPS) were the main features. In conclusion, the process of biosynthesis of AgNPs from the aqueous leaf extract of Hyphaene thebaica is environmentally compatible and induces the biosynthesis of tiny AgNPs that could be a promising candidate in biomedical applications, including antimicrobials against some pathogenic bacteria and yeasts. FAU - Alabdallah, Nadiyah M AU - Alabdallah NM AD - Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia. AD - Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia. FAU - Kotb, Essam AU - Kotb E AD - Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia. AD - Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia. LA - eng PT - Journal Article DEP - 20230322 PL - Switzerland TA - Microorganisms JT - Microorganisms JID - 101625893 PMC - PMC10054916 OTO - NOTNLM OT - antibacterial OT - anticandidal OT - characterization OT - doum palm OT - silver nanoparticles COIS- The authors declared no conflict of interest among them. EDAT- 2023/03/30 06:00 MHDA- 2023/03/30 06:01 PMCR- 2023/03/22 CRDT- 2023/03/29 01:55 PHST- 2023/01/25 00:00 [received] PHST- 2023/03/04 00:00 [revised] PHST- 2023/03/06 00:00 [accepted] PHST- 2023/03/30 06:01 [medline] PHST- 2023/03/29 01:55 [entrez] PHST- 2023/03/30 06:00 [pubmed] PHST- 2023/03/22 00:00 [pmc-release] AID - microorganisms11030807 [pii] AID - microorganisms-11-00807 [pii] AID - 10.3390/microorganisms11030807 [doi] PST - epublish SO - Microorganisms. 2023 Mar 22;11(3):807. doi: 10.3390/microorganisms11030807.