Effects of Glyphosate on gill structure of Common Carp (Cyprinus carpio)
Document Type : Original Article
Authors
1 Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman
2 Department of Biology, Faculty of Sciences, Payame Noor University, Oshnaviye
Abstract
Agricultural pesticides are one of the most toxic pesticides that have a significant impact on aquatic organisms, pathological indicators can be used to determine their toxicity. In this study effects of different concentrations of glyphosate on Cyprinus carpio investigated. Specimens were exposed to different concentrations of glyphosate (20.05mg/l) and control group for one week. Then the fish were anesthetized by clove, gills were removed and then histological sections were prepared using standard histology method and histopathologic effects were studied. According to the observations, tissue damages including hyperplasia and hypertrophy of gill cells, vacuolation, epithelium cells lifting in secondary lamella, club-shaped of lamellae, aneurism, edema, adhesion of secondary filaments and degenerative and necrotic changes of gill filaments and secondary lamellae was observed. With increased glyphosate concentration gill pathological alterations were higher, so that the most severe effects including adhesion and necrosis were observed in third treatment (20% LC50). Therefore, these pathological indicators can be used as biomarkers. According to the pathological effects, glyphosate is introduced as a toxin with severe effects on animal aquatic tissues.
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