Effects of soil C:N on growth and distribution of nitrogen and carbon of Malus hupehensis seedlings Effects of Different Zeolite Amount on the Growth of Potted Malus hupehensis Rehd. Seedlings and Utilization of 15N-urea Transformation of Malus × domestica with MhRAR1 and MhSGT1 Genes from Malus hupehensis for Resistance of Botryosphaeria berengeriana Construction of a Divalent Plant Binary Expression Vector MhT2AC from Malus hupehensis and Analysis of Salinity Tolerance in the Tobacco Transformants Construction of ihpRNA Expression Vector of MhVPE Gene from Malus hupehensis and Verification by Transgenic Arabidopsis thaliana Construction of ihpRNA Expression Vector of MhVPE Gene from Malus hupehensis and Verification by Transgenic Arabidopsis thaliana Effects of Different Zeolite Amount on the Growth of Potted Malus hupehensis Rehd. Seedlings and Utilization of 15N-urea Effect of molybdenum on absorption, transformation and distribution of nitrate-nitrogen of apple rootstock Malus hupehensis Rehd. seedlings