Effect of osmotic stress on the chloride and mucous cells in the gill epithelium of the fresh-water teleost Barbus filamentosus (Cypriniformes, Pisces). A structural and histochemical study.
A histochemical analysis of mucous and chloride cells has been made in the gills of the fresh-water Teleost Barbus filamentosus after the acclimation to 8 0/00 sea-water. The number of the chloride cells at the basis of the respiratory leaflets in control fish is very few and increases markedly during the various times of adaptation. These cells along with a limited number of goblet cells located in the gill interfilamentar membrane which show properties of typically salt excretory glands after the same salt water treatment, are good visualized in the succinate dehydrogenase enzyme and Mg++-dependent ATPase enzyme preparations in addition to the reactivity found with the chloride test thus suggesting their role in the secretory transepithelial NaCl transport across the gill surface.
D000251:Adenosine Triphosphatases / Q000378:metabolism; D000818:Animals; D017301:Ca(2+) Mg(2+)-ATPase; D002712:Chlorides / Q000378:metabolism; D005399:Fishes; D005880:Gills / Q000166:cytology / Q000502:physiology*; D009997:Osmotic Pressure; D013194:Staining and Labeling; D013385:Succinate Dehydrogenase / Q000378:metabolism
D002712:Chlorides; D013385:Succinate Dehydrogenase; D000251:Adenosine Triphosphatases; D017301:Ca(2+) Mg(2+)-ATPase