EN
Slaweta, R., Laskowska, T. and Szymańska, E.: Lipid peroxides, spermatozoa quality and activity of glutathione peroxidase in bull semen. Acta physiol, pol., 1988, 30 (3): 207-214. In bull semen spontaneous lipid peroxidation measured by the level of endogenous lipid peroxides and the consequences of this process for morphological and biochemical changes was studied. Glutathione peroxidase activity as protective enzyme against peroxidative damage was also determined. Obtained results showed that approximately two thirds of GSH-Px activity in bull semen was non Se-dependent glutathione peroxidase activity. Malonaldehyde (MDA) level was negative correlated with selenium-dependent GSH-Px activity (r = -0.38, P < 0.01). Spermatozoa with acrosome entirely lost appeared to increase as the MDA level increased (r = 0.18, P < 0.05). The negative correlation between Se GSH-Px activity and spermatozoa with acrosome separation from head (r = -0.28, P< 0.0,1) and entirely lost (r = - 0.21, P < 0.05) suggest that selenium-dependent GSH-Px plays role in protecting the acrosome against disruption of the acrosomal membrane. The total glutathione peroxidase activity was unrelated to studied variables of bull semen.