Impact of weak permanent magnetic field on antioxidant enzyme activities in radish seedlings

The impact of weak permanent magnetic field (PMF) with magnetic flux density of 185–650 μT on activities of antioxidant enzymes in 5-day-old radish (Raphanus sativus L. var. radicula D.C.) seedlings, cv, Rosovo-krasnyi s belym konchikom was demonstrated. In the range of 185–325 μT PMF suppressed superoxide dismutase (SOD) activity in seedling grown in darkness and catalase (CAT) grown in both darkness and light. At the same values of magnetic flux density, all fractions of guaiacol peroxidase were activated and MDA accumulation was enhanced. At the higher values of magnetic flux density, SOD was activated in seedlings grown in darkness and CAT was activated in seedlings grown in both darkness and light. Other indices decreased or remained unchanged. It was concluded that PMF action depends on its intensity: at its low values, antioxidant enzymes are inhibited and at high values — activated.