Antioxidant and antibacterial activity of biogenic zirconium oxide nanoparticles from Candida orthopsilosis DSB1 isolated from backwaters of Sunderbans, West Bengal
by Anwesha Sarkar; Debayan Ghosh; Soupam Das; K.V. Bhaskara Rao
International Journal of Nanoparticles (IJNP), Vol. 13, No. 3, 2021

Abstract: The current investigation showcases the biogenesis of zirconium oxide nanoparticles by marine yeast, isolated from backwaters of Sundarbans, India. A total of 21 marine yeast isolates were isolated and screened for biosynthesis of zirconium oxide nanoparticles. The potential marine yeasts DSB1 and DSB2 were initially identified by microscopic and biochemical analysis. After spectrophotometric analysis, the ZrO₂ nanoparticle DSB1NP was characterised using AFM, FT-IR, SEM and XRD analysis. SEM and AFM analysis suggested that the size of the ZrO₂NP DSB1NP was 38 nm and they were spherical in shape. Biogenic DSB1NP showed better metal chelating activity (57%), DPPH scavenging activity (63.8%), and reducing power activity (61.3%) than DSB2NP. DSB1NP has also showed good antibacterial activity against Staphylococcus aureus (22 ± 0.7), Klebsiella pneumoniae (19.5 ± 2.1), Escherichia coli (18.4 ± 0.9) and also Pseudomonas aeruginosa, Salmonella typhi, Bacillus cereus and Listeria monocytogenes. The potential marine yeast isolate was identified as Candida orthopsilosis DSB1 (Acc. No. MH050814) using 18s rRNA sequencing.

Online publication date: Tue, 12-Oct-2021

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