Effect of branch and stem pruning on photosynthetic characteristics of Platanus acerifolia L. The Establishment of Clone System of Platanus acerifolia(Ait.)Willd EFFECTS OF ~(60)Co γ-RAYS RADIATION ON BIOLOGICAL CHARACTERS OF Platanus acerifolia Willd.SEED AND SEEDLINGS Factors Affecting Shoot Regenera tion from Leaf and Hypocotyl Explants ofPlatanus acerifolia Willd. Factors Affecting Shoot Regenera tion from Leaf and Hypocotyl Explants ofPlatanus acerifolia Willd. Temperature characteristics of winter Buds‘ dormancy in Platanus acerifolia Establishment of Leaf Regeneration System in Platanus acerifolia Studies on the Pollen Vitality and Storage Capacity in Platanus acerifolia