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Effects of pyraclostrobin on growth,oxidative stress,and gene expression in relation to stress and ATP-binding cassette transporters in Tetrahymena thermophila

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Journal of Oceanology and Limnology 2024年第1期42卷 150-162页

作者： Yang LIU Jiale ZHANG Peng XIAO Xin LIU yisifu ma Jing ZHANG Bangjun ZHANG Henan International Joint Laboratory of Aquatic Ecotoxicology and Health Protection Xinxiang 453007China College of Life Sciences Henan Normal UniversityXinxiang 453007China Journal of Henan Normal University Xinxiang 453007China College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China Department of Ecosystem Studies School of Environmental ScienceUniversity of Shiga PrefectureShiga 522-8533Japan

Pyraclostrobin(PYR),a widely used fungicide,has negative effects on fish and algae,but its toxicity in protozoa remains *** this study,the effects of PYR on the growth,oxidative stress,and gene expression related to stress and ATP-binding cassette(ABC)transporters in Tetrahymena thermophila were *** result showed that the 96-h IC_(50)of PYR against *** was 17.2 mg/***,PYR inhibited the growth of *** in concentration-or time-dependent manner.A morphological study revealed that the shape and size of *** changed,and damage of cell membrane surface was observed by scanning electron microscopy after 96 h of PYR *** activities of superoxide dismutase(SOD)and catalase(CAT)increased throughout the *** contrast,the glutathione(GSH)content was increased at 24 h and 48 h of exposure and decreased at 96 ***,a significant increase in malondialdehyde(MDA)level was observed in *** after96 h of ***,PYR upregulated the HSP703,HSP705,GPx2,and ABAC15 gene expression in the 0.1–5-mg/L groups and downregulated the HSP704,HSP90,TGR,and ABCC52 mRNA levels at 96 h of *** results suggest that PYR may exert adverse effects on *** by inducing oxidative stress and changing the gene expression related to ABC transporters and stress,which may enrich the understanding of the toxicity mechanism of PYR in aquatic organisms and provide reference data for aquatic ecological risk assessments.

关键词： pyraclostrobin Tetrahymena thermophila growth oxidative stress gene expression

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