Histopathology alterations and lipid peroxidation as biomarkers of hydrocarbon-induced stress in earthworm, Eudrilus eugeniae
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Date
2013
Authors
Eseigbe, Francis J.
Doherty, Victoria F.
Sogbanmu, Temitope O.
Otitoloju, Adebayo A.
Journal Title
Journal ISSN
Volume Title
Publisher
Environmental Monitoring and Assessment
Abstract
This study investigated the biomarker responses of the earthworm, Eudrilus eugeniae, exposed to sublethal concentrations of benzene, toluene and xylene (BTX) for a time span of 28 days. Lipid peroxidation (LPO) and histopathological alterations were examined. Toxicological evaluations of BTX were carried out against E. eugeniae. On the basis of the 96-h LC50 value, xylene (1.212 mg/kg) was found to be the most toxic followed by toluene (1.335 mg/kg) and benzene (1.896 mg/kg) was the least toxic. The exposure of earthworms to sublethal concentrations (1/10th and 1/100th of 96 h LC50) of BTX premixed with the substrate (loamy and humus soil) induced pathological changes in the clitella such as severe lesion, necrosis and dark brown pigments. The result of the lipid peroxidation assay showed a significant increase in oxidative damage with LPO values ranging from 2.58–7.8 nM/g in exposed animals when compared to 0.07 nM/g in the control group. The findings from this study suggest the use of LPO and histopathology as useful biomarkers of exposure for early detection of petroleum related stress in terrestrial ecosystems.
Description
Keywords
Biomarkers , Earthworm , Histopathological alterations , Lipid peroxidation , Hydrocarbons , Research Subject Categories::NATURAL SCIENCES
Citation
Eseigbe, F. J., Doherty, V. F., Sogbanmu, T. O. and Otitoloju, A. A. (2013). Histopathology alterations and lipid peroxidation as biomarkers of hydrocarbon-induced stress in earthworm, Eudrilus eugeniae. Environmental Monitoring and Assessment 185: 2189-2196.