Construction of a plant expression vector containing antifreeze protein(afp)gene and it‘s transformation into banana(Musa AAA Cavendish)embryogenic cell suspension A Preliminary Study on Agrobacterium Tumefaciens-mediated Co-transformation of Double Genes in Rice AGROBACTERIUM TUMEFACIENS-MEDIATED TRANSGENIC WHEAT PLANTS WITH GLUTAMINE SYNTHETASES CONFER TOLERANCE TO HERBICIDE Expression of AtPSK2 gene in roselle cells