title: The presence of defective prophages in Agrobacterium tumefaciens, strains 806 and B6S.
mesh_terms: D001435:Bacteriophages; D003470:Culture Media; D008242:Lysogeny; D010944:Plants; D012231:Rhizobium / Q000166:cytology*; D014466:Ultraviolet Rays; D014774:Virulence
chemical_list: D003470:Culture Media