Biosafety Evaluation of Zinc Oxide Nanoparticles (ZnO NPs) on Polypedates maculatus (Gray, 1830)
Journal Title: International Journal of Zoological Investigations - Year 2018, Vol 4, Issue 1
Abstract
An investigation on the toxicological effects of Zinc Oxide nanoparticles (ZnO NPs) on tadpoles, Polypedates maculatus in terms of growth, metamorphosis and innate immunity was done. Tadpoles other than those in the control (C) group,were exposed to three different concentrations of ZnO NPs viz., 50 mg/L (T1), 10 mg/L (T2), 1 mg/L (T3) for a period of 60 days. It was found that, tadpoles in T1 and T2 groups recorded 25% mortality upto45 days of experimental period,whereas 50% mortality was recorded in T1 group exposed to 60 days, no mortality was observed in T3 (1 mg/L). Moreover, tadpoles exposed to ZnO NPs at 50 and 10mg/L were found to have stunted growth and delayed metamorphosis in comparison to those exposed to 1 and 0 mg/L. The non-specific immune parameters such as myeloperoxidase, respiratory burst, lysozyme, bacterial agglutination and hemagglutination activities were found to vary drastically in treated group as compared to the control. The serum enzymatic activities such as acetyl choline (AChE), super oxide dismutase (SOD), lactate dehydrogenase (LDH) and alkaline phosphatase (ALP) varied in proportion to the doses of ZnO NPs applied. Thus, the ZnO NPs had significant (p<0.05) detrimental effects on growth, immunity and other associated physiological parameters of tadpoles, Polypedates maculatus when exposed to concentration (>10 mg/L) for longer durations (>45 days). The toxicity studies of ZnO NPs should, therefore be conducted on a wider range of target and non-target species to assess their environmental impacts.
Authors and Affiliations
P. Swain
Keywords
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