Abstract: After treatment tomato seeds with magnetic field, observed the germination rate, the change of the catalase (CAT)and peroxidase (POD) and the effect on the peroxidase isoenzyme.The results revealed that the seeds germination rate is highest, the activity of the catalase (CAT) and the peroxidase (POD)is highest. The activity of the peroxidase isoenzyme is highest too, when magnetic field is in range 1000~2000 GS.The seeds germination rate and the activity of CAT and POD is lower, when the intensity of magnetic field is higher than 3000 GS.

Key words: Magnetic field, Tomato, Catalase, Peroxidase, Peroxidase isoenzyme