. "Effect of extremely low frequency electromagnetic fields on antioxidant enzymes in valerian (Valeriana officinalis L.). Sara Farzpourmachiani1*, Ahmad Majd2, Sedigheh Arbabian2, Davoud Dorranian3 and Mehrdad Hashemi4". Iranian Journal of Plant Physiology, 5, 4, 2015, 1465-1472. doi: 10.22034/ijpp.2015.539674