Immunohistochemical study on gill chloride cells in Sobaity, Sparidentex hasta under different environmental salinities

Authors

Department of Marine Biology, Faculty of Marine Sciences, Khorramshahr University of Marine Science and Technology, Khoramshahr- Iran

Abstract

BACKGROUND: Regulation of electrolytes levels and water in fish is very important because of its vast permeable surfaces that are in contact with the environment. Therefore, for homeostasis and osmoregulation, various adaptation mechanisms at different biological levels have  been developed. OBJECTIVES: The aim of this study was to determine the changes and adaptations of mitochondria-rich cells as an important cellular response to these changes.This was influenced by different environmental salinities in fish Sparidentex hasta which are very important economic species in the southern region of the country. METHODS: 180 fish, aged three months, 20 - 25 cm in length and weighing about 150 gr were exposed  directly to different concentrations of salt (5, 20, 40 and 60 ppt) for 1 week. Localization of the Na +, K +-ATPase in mitochondria-rich cells in gill epithelial were studied in different environmental salinities during the adaptation period.  was performed by using IgGα5 as immunohistochemistry method. RESULTS: NKA localization showed that the mitochondria-rich cells are in the filament and rarely in lamellar epithelium. Intensity reactive of the antibody used during the period showed an increase  in 5 and 60 ppt and decrease  in 40 ppt. CONCLUSIONS: Generally, tolerance and compatibility of Sparidentex hasta to salinity changes are due to rapid changes in mitochondria-rich cells to regulate the entry and exit of water and electrolytes. So to adapt with the new condition of environment some changes in the apical openings appear that regulate the amount of the carrier electrolyte enzymes in basolateral membrane. It also causes adaption of mitochondria activity to the new condition.

Keywords

References

 
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