Effects of Extremely Low Frequency Electromagnetic Fields on the Antioxidant Enzymes Activity of C3 and C4 Plants

摘要

This experimental study was dedicated to the possible oxidative stress induced by electromagnetic field accumulation in the living tissues. In this research two states of seeds (wet, dry) of Brassica Napus L (canola) and Zea mays L (maize) were exposed to pulsed EMFs (15 min on, 15 min off) by magnitude of 1 to 7mT in steps of 2mT and the highest intensity was 10 mT for 1 to 4 hours in steps of 1 h. Activity of stress enzymes were carried out by spectrophotometer. Our investigation was focused on root and shoot of 7 days seedlings, which showed the most and the least growth comparing to corresponding control. Activity of all stress enzymes in root tissue of canola increased and in shoot tissue of this species decreased. In contrary, activity of the same stress enzymes in the same tissue of maize showed opposite results, except APX activity in the root tissue, which showed similar result in both species (P < 0.05). All results suggested that antioxidant system of canola as a C3 plant and maize as a C4 plant react differently against EMFs.