alexa Evaluation of genotoxicity of PCP and 2,4-D by micronucleus test in freshwater fish Channa punctatus.
Agri and Aquaculture

Agri and Aquaculture

Fisheries and Aquaculture Journal

Author(s): Farah MA, Ateeq B, Ali MN, Ahmad W

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Abstract An in vivo study on the genotoxic effects of pentachlorophenol (PCP) and 2,4-dichlorophenoxyacetic acid (2,4-D) was carried out with freshwater air-breathing fish Channa punctatus. The fish were exposed to three sublethal doses of PCP (0.2, 0.4, and 0.6 ppm) and 2,4-D (25, 50, and 75 ppm) by medium treatment. Micronucleated erythrocytes were sampled at intervals of 48, 72, and 96 h post-treatment. Student's t test revealed significant increases in micronucleus (MN) frequency. Maximum incidence of MN was recorded at highest concentrations and durations for both chemicals. A time- and dose-dependent response of the MN frequency for both chemicals was confirmed. PCP-treated groups had 8-10 MN per cell, specifically at higher concentrations and duration. Echinocytes were recorded at higher concentrations of 2,4-D. The study confirmed the genotoxicity of PCP and 2,4-D in this organism. PCP was found to be more toxic than 2,4-D in terms of MN induction. This assay has further potential for detecting genotoxic compounds in aquatic ecosystems. Copyright 2002 Elsevier Science (USA)
This article was published in Ecotoxicol Environ Saf and referenced in Fisheries and Aquaculture Journal

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