STUDY ON COMBINING ABILITY OF SULFATE UPTAKE AFFINITY FOR SEEDLING ROOTS OF MAIZE(Zea mays L.) HETT-SHOCK PROTEINS IN WHEAT 应用~(35)S模拟酸雨硫在蔬菜和土壤中的分布 PREPARATION OF ~(35)S-DAPTCO Expression of CaMV 35S Promoter in Transgenic Cotton Advances in the Biosafety Research of Non-target DNA in Transgenic Plants