Photosynthetic Characteristics of Green Apple Fruits Protoplast Culture and Plant Regeneration of Malus pumila Effects of Half -and Whole -rhizoshpere Droughts on Osmosis - regulating Substances in In Vitro Seedlings of Gala Apple (Malus pumila Mill.) Subcellular Localization of ABA Binding Sites in Tissues of Apple Chemical constituents isolated from branches of Malus pumila The Occurrence of Valsa malicola on Apple Trees and Its Pathogenicity General Application Analysis of SSRs Derived from Apple (Malus pumila) on Other Species in Rosaceae Potential Effect of Extracts of Roots of Malus pumila and Populus canadensis on Wheat Growth General Application Analysis of SSRs Derived from Apple (Malus pumila) on Other Species in Rosaceae