DAO 113:227-234 (2015)  -  DOI: https://doi.org/10.3354/dao02850

Histopathological effects of atrazine on gills of Caspian kutum Rutilus frisii kutum fingerlings

Zahra Khoshnood1,*, Shahla Jamili2, Saber Khodabandeh

1Department of Experimental Sciences, College of Science, Dezful Branch, Islamic Azad University, PO Box 313, Dezful, Khuzestan, Iran
2Iranian Fisheries Researches Organization, Tehran, Iran
3Department of Marine Biology, Faculty of Marine Sciences, Tarbiat Modares University, Tehran, Iran
*Corresponding author:

ABSTRACT: The use of chemical pesticides has increased environmental pollution and affects fishes as non-target organisms. To investigate the toxic effects of the widely used herbicide atrazine on Caspian kutum Rutilus frisii kutum fingerlings, fish were exposed to a sublethal concentration of half LC50 for 96 h. The main alterations visible in the gill tissue were detachment of the epithelium of the lamellae, necrosis, lamellar fusion, hyperplasia, club shaped lamellae, collapse of the lamellae, shrinkage and curling of the lamellae, and ultrastructural alterations such as necrosis of the apical microridges of the pavement cells. Results also showed that the gill ionocytes were fewer in number and larger in size in the atrazine-exposed fish. Atrazine appears to be highly toxic to Caspian kutum fingerlings even at a sublethal concentration (12.47 mg l-1) and acute exposure. This toxicity could affect gill respiration and ion regulation function of fingerlings by damaging tissue, pavement cells, and ionocytes.


KEY WORDS: Ionocyte · Osmoregulation · Toxicology · Immunohistochemistry · Ultrastructure


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Cite this article as: Khoshnood Z, Jamili S, Khodabandeh S (2015) Histopathological effects of atrazine on gills of Caspian kutum Rutilus frisii kutum fingerlings. Dis Aquat Org 113:227-234. https://doi.org/10.3354/dao02850

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