Features of hemoglobin system of Perca fluviatilis L

The functional properties of hemoglobin and the ionic environment in the perch Perca fluviatilis L were studied. Buffer and respiratory properties of hemoglobin system were determined on the basis the oxygen affinity, Bohr effect and the concentration of sodium and potassium in red blood cells. The features of these properties are considered as mechanisms for the increase of the stability of perch to acidification of water and low oxygen content. At a perch the large quantity of reaction of hemoglobin oxy-deoxygenation process is observed at change of concentration and acidity of a buffer solution. The large value of the Bohr effect and a low affinity of hemoglobin to oxygen up to incomplete oxygenation in an acidic buffer solution indicate the high efficiency of the hemoglobin buffer system of a perch in adaptation to low pH value of the medium. High sodium concentrations in perch erythrocytes demonstrates the high intensity of the Na +/H + exchange through the membrane of red blood cells and consequently a ability to alkalization intraerythrocytic medium. High affinity of hemoglobin for oxygen (up to incomplete deoxygenation in an alkaline buffer solution) observed at perch is the important molecular mechanism of adaptation to hypoxia, providing a reduction in oxygen consumption of an organism. Perch are also characterized by a high concentration of potassium in red blood cells, as well as other fish that are resistant to hypoxia.