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Toxicity of the novel fungicide oxathiapiprolin to Chlorella vulgaris: Assessments at different levels of biological organization. | LitMetric

AI Article Synopsis

Article Abstract

Oxathiapiprolin (Otp) is the first successful oxysterol-binding protein (OSBP) inhibitor in oomycete control. It is regarded as a significant milestone in the history of fungicide discoveries and has vast application prospects. There is little available information on the ecotoxicity of Otp to aquatic organisms. In this study, we evaluated the toxic effects of Otp in the Chlorella vulgaris (C. vulgaris). The results revealed the acute toxicity of Otp to C. vulgaris, with a 96-h median effective concentration for growth inhibition of 0.74 mg/L. When algal cells were exposed to 0.5 and 1.5 mg/L Otp, their chlorophyll and carotenoid contents dropped dramatically. As suggested by the significant increase in reactive oxygen species (ROS) and malondialdehyde (MDA) levels and the remarkable changes in the activity of a series of antioxidant enzymes, Otp induces production of ROS, resulting in oxidative damage. In addition, Otp can damage cell structures and could destroy membrane integrity. Finally, the changes in endogenous substances indicated that Otp can perturb energy metabolism and photosynthesis in C. vulgaris cells. The experimental results suggest that Otp can have toxic effects on algal cells by disturbing photosynthesis and causing oxidative damage and abnormal energy metabolism in C. vulgaris cells.

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Source
http://dx.doi.org/10.1016/j.chemosphere.2021.132752DOI Listing

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