Changes of Polyamines Content and Polyamine Oxidase Activity of Roots and Leaves During Drought Stress in Wheat Seedlings Change and Determination of Binding Polyamine Oxidase Activity on Cell Wall of Cucumber Roots under Hypoxia stress Activity and Cytochemical Localization of Polyamine Oxidase in Soybean Seedlings during Early Growth EFFECT OF CALCIUM ON POLYAMINE CONTENT AND POLYAMINES OXIDASE ACTIVITY IN MUSKMELON SEEDLINGS UNDER HYPOXIA STRESS Involvement of Hydrogen Peroxide Generated by Polyamine Oxidative Degradation in the Developmentof Lateral Roots in Soybean Polyamine Contents and Polyamine Oxidase Activities in Roots and Leaves of Two Jujube (Ziziphus jujuba Mill.) Cultivars with Contrary Salt Tolerance under Salt Stress Effects of Calcium on Polyamines Contents and Polyamines Oxidase Activity of Cucumber Seedlings with Hypoxia Stress Involvement of Polyamine Oxidase in Abscisic Acid-induced Cytosolic Antioxidant Defense in Leaves of Maize Hydrogen peroxide participates symbiosis between AM fungi and tobacco plants Physiological Mechanism Regulating Light-induced Mesocotyl Elongation by Polyamine Oxidase (PAO) in Maize