Greenhouse and field experiments were conducted to study the changes of antioxidant enzyme activities of arbuscular mycorrhizal (AM) fungus Glomus intraradices Schenck and Smith inoculated (M+) and non-inoculated (M−) maize (Zea mays L.) plants (variety COHM5) under varying levels of zinc ( and 25 kg ha−1) iron ( and 25 kg ha−1). |