فهرست نشریات علمی دسترسی آزاد ایران

Lead pollution is an important issue in the world. In this research maize plants were treated with different concentrations of lead (0, 0. 25, 0.75, 1, 1.5, 2.5 and 5 mM) was applied as lead (II) nitrate for 10 days. The results showed that increase in lead concentration leads to reduction in growth, chlorophyll a and b content and increase in oxidative damages. Application of Pb significantly increased hydrogen peroxide content which followed by a significant level of lipid peroxidation. These changes were accompanied by increase in nitric oxide content in the low and its reduction in the high concentrations. Small increase in generation of hydrogen peroxide and nitric oxide are envisaged at low concentrations as messengers in signaling pathways that may act in triggering defense functions to detoxify lead. Therefore plant’s stress tolerance variables, including proline, ascorbic acid, flavonoid and anthocyanins content and activity of antioxidant enzymes enhanced under different lead applications.