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R Factor Transfer in Rhizobium leguminosarum
Microbiology · 1974 · Vol. 84(1) · pp. 188–198
J. E. Beringer✉(John Innes Centre)
Abstract
SUMMARY: R factors of the compatibility class P were transferred between strains of Escherichia coli k12 and Rhizobium leguminosarum. These R factors were stable in R. leguminosarum and conferred similar levels of antibiotic resistance to those in the corresponding R+ E. coli k12 hosts, with the exception of carbenicillin resistance which was greatly reduced. Transfer between R. leguminosarum strains was by conjugation and was stimulated by conditions favouring spheroplast formation. R factor mediated recombination could not be demonstrated.
Legume Nitrogen Fixing SymbiosisRhizobium leguminosarumCarbenicillinEscherichia coliMicrobiologyBiologyRhizobiaceaeBacteriaSymbiosisAmpicillinGenetics
MeSH terms
Anti-Bacterial AgentsCarbenicillinConjugation, GeneticCrosses, GeneticCulture MediaDeoxyribonucleasesEscherichia coliExtrachromosomal InheritanceMutagensNitrosoguanidinesNitrous AcidPenicillin ResistanceRecombination, GeneticRhizobiumSpheroplasts
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