title: Nitrogenase activity in pure cultures of spectinomycin-resistant fast and slow-growing Rhizobium.
mesh_terms: D004352:Drug Resistance, Microbial; D009591:Nitrogenase / Q000378:metabolism*; D010101:Oxygen Consumption; D012231:Rhizobium / Q000201:enzymology* / Q000254:growth & development; D000198:Spectinomycin / Q000494:pharmacology*
chemical_list: D000198:Spectinomycin; D009591:Nitrogenase