Agrobacterium tumefaciens
Natural genetic transformation has been reported in at least four "Hyphomicrobiales" species: "Agrobacterium tumefaciens", "Methylobacterium organophilum", "Ensifer adhaerens", and "Bradyrhizobium japonicum". Natural genetic transformation is a sexual process involving DNA transfer from one bacterial cell to another through the intervening medium, and the integration of the donor sequence into the recipient genome by homologous recombination.