The Ultrastructural Changes Induced by Radiation in the Meristematic Cells of Root Tips of Wheat Antioxidant Enzyme Activities in Root Tips of Vigna unguiculata L. Seedlings under Aluminum Stress Regeneration Capacity and Some Affecting Factors of Different Parts of Young Seedlings of Maize (Zea mays L.) Influence of light, agar and carbon sources to growth of in vitro cultured root tips of Fraxinus mandshurica Effect of Cupreous and Zincous Preparations Treatment on the Root Control for Container Seedlings of Ginkgo biloba Effects of aluminum on hydrogen peroxide content and cell wall-bound peroxidase activity in wheat root tips