A. A. Soldatov1, I. A. Parfyonova2, V.N.Novitskaya1
1Institute of Biology of Southern Seas, National Academy of Science of Ukraine, Sevastopol;
2Sevastopol National Technical University, Ukraine
Coupling of membrane and metabolic functions in nuclear erythrocytes was investigated under experimental hypoxia conditions in fishes (Liza aurata, Scorpaena porcus) with different tolerance to oxygen deficiency. It was shown, that resistant to hypoxia Scorpaena porcus keeps in erythrocytes transmembrane gradients of K+ and Na+ and cellular concentration АТP under 15% of oxygen saturation of sea water. It was connected with the decrease in Na+,K+-АТPase and hexokinase activity. The reaction to oxygen deficiency was opposite in sensitive to hypoxia Liza aurata erythrocytes. A decrease in ionic gradients and concentration of АТP in red blood cells was observed while the activity of Na+,K+-АТPase and hexokinase was high. The reasons of the differences obtained are discussed.
Key words: hypoxia, Na+,K+-АТPase, hexokinase, transmembrane gradients of K+ and Na+, АТP, nuclear erythrocyte, marine fishes.
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