title: Ineffectiveness of viomycin-resistant mutants of Rhizobium meliloti.
mesh_terms: D004352:Drug Resistance, Microbial; D005827:Genetics, Microbial; D005779:Immunodiffusion; D009154:Mutation; D009586:Nitrogen Fixation; D012231:Rhizobium / Q000187:drug effects* / Q000254:growth & development / Q000276:immunology; D014756:Viomycin / Q000494:pharmacology*
chemical_list: D014756:Viomycin