NDLI: Universidade Federal De Santa Catarina Centro De Ciências Biológicas Programa De Pós-graduação Em Biotecnologia E Biociências

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Universidade Federal De Santa Catarina Centro De Ciências Biológicas Programa De Pós-graduação Em Biotecnologia E Biociências

Content Provider	Semantic Scholar
Author	Moser, Juliana Righetto
Copyright Year	2011
Abstract	Permethrin is the most common pyrethroid insecticide used to grow rice crops in many countries. Sub-lethal concentrations of permethrin may negatively impact the productivity of shrimp farms located in the vicinity of rice fields due to the effects on physiological and biochemical responses in cultivated shrimp. In the present study, we investigated the activity of antioxidant defense enzymes, catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GPx), as well as glutathione-S-transferase (GST) and acetylcholinesterase (AChE) in juvenile Litopenaeus vannamei following two different conditions of exposure to permethrin (0.01; 0.1; 0.2; 0.3; 0.4 μg.L 1 for 96h and 0.8 μg.L 1 for 6, 12, 24, 48, 72 and 96h). Enzymatic assays were conducted in gills and hepatopancreas of exposed shrimp. Transcription levels of the genes encoding these enzymatic biomarkers were addressed by real time PCR in both tissues. Changes were seen in CAT and GPx activities in gills, in contrast with the hepatopancreas. GST activity was increased at 24 and 48h of exposure in both tissues while SOD was increased only in hepatopancreas. Decreased AChE activity was seen between 6 and 12h in both target tissues. Pesticide stress induced GPx and SOD gene expression in gills between 48 and 96h while these genes were induced earlier in hepatopancreas. The pattern of transcriptional and enzymatic responses elicited after permethrin exposure supports a multi-biomarker approach as a useful tool for monitoring the aquatic environment.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://repositorio.ufsc.br/xmlui/bitstream/handle/123456789/95347/299617.pdf;jsessionid=5D76002F13455317ED2D9FE50370C39E?sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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