Genotoxic Endpoints in Allium cepa and Clarias gariepinus Exposed to Textile Effluent

Adebayo A. Otitoloju; Adeolu O. Aderemi; Olubunmi A.Otubanjo; Victoria A.Oriaku
The genotoxic effects of textile effluent were investigated in Clarias gariepinus and Allium cepa using the micronucleus assay and induction of chromosomal aberration in respectively. The aim of the study is to provide genotoxic endpoints that can serve as biomarkers of exposure to textile effluents in the environment. The physico-chemical characterization of the effluent revealed high levels of chemical oxygen demand (COD), biological oxygen demand (BOD) and total suspended solids (TSS) above the standards set by regulatory body. Exposure of Clarias gariepinus to sub-lethal concentrations of effluent resulted in a dose-dependent and significant (P<0.05) increase in the formation of micronuclei and nuclear anomalies in blood erythrocytes. The textile effluent also caused a significant (P<0.5) reduction in mean root length and increased chromosomal aberrations such as vagrant, sticky chromosomes, binucleus and c-tumors in exposed Allium cepa compared to control. The results obtained from this study indicate the textile effluent being discharged into the Lagos lagoon have genotoxic potential and is capable of causing significant ecological disruption in the receiving environment.
textile effluent; genotoxic effects; Clarias gariepinus; Allium cepa
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