Radiation stimulated the activities of SOD and GR statistically significantly (P < 0.05), and this stimulation reached its maximum at 400 Gy. On the other hand, the activity of CAT was the highest after an irradiation to 600 Gy. It is interesting that the APX activity decreased after irradiations to all the tested doses, whereas the activities of SOD, GR and CAT increased, especially in the plants exposed to 400 and 600 Gy