Construction of T-DNA Activation Tagging for Populus Functional Genomics Herbicide Resistance Gene (bar) was Introduced into the Chloroplast of Tobacco Development of A Monoclonal Antibody Sandwich ELISA for Detection of bar Gene Transgenic Plant and Element Construction of plant expression vectors containing two anti-fungal and one anti-herbicide genes and their expression in transgenic tobacco Optimization of transgenic system of barley and transformation of TrxS gene by means of particle bombardment Studies on cry1Ac Gene Transgenic Plants of Saccharum Complex by Particle Bombardment