Differences of growth and root absorption of different apple rootstock seedlings in replant stress Difference of Organic Acid Exudation from Roots of SH40 and Balenghaitangunder Iron-deficiency Stress Resistance Evaluation of Tomato Rootstocks and Cultivars ( Lycopersiconesculentum ) to Southern Root-knot Nematodes (Meloidogyne incognita ) Resistance Evaluation of Tomato Rootstocks and Cultivars ( Lycopersiconesculentum ) to Southern Root-knot Nematodes (Meloidogyne incognita ) Comparative Studies on Anatomical Structure of Roots in Three Citrus Seedling Rootstocks and Their Two Somatic Hybrids Comparative Studies on Anatomical Structure of Roots in Three Citrus Seedling Rootstocks and Their Two Somatic Hybrids Effects of Mn Stress on Mn Uptakes and Antioxidant System of Young Apple Trees of Different Rootstocks Effects of Mn Stress on Mn Uptakes and Antioxidant System of Young Apple Trees of Different Rootstocks Advances in the Studies on Citrus Rootstock Evaluation and Application Isolation and Expression of MdNCED1 Gene from Apple Rootstock SH40 Effect of Compact Mutants and Dwarfing Rootstocks on Endogenous HormoneContent of Apple Difference of Organic Acid Exudation from Roots of SH40 and Balenghaitangunder Iron-deficiency Stress Advances in the Studies on Citrus Rootstock Evaluation and Application STUDIES ONCLASSIFICATION OF CITRUS ROOTSTOCKS ON THEBASIS OF THEIR DWARFING CHARACTERISTICS