Positive selection of nodulation-deficient Rhizobium phaseoli. 1982

E A Raleigh, and E R Signer

A high proportion of Rhizobium phaseoli mutants that survived infection with phage F1 were found to be nodulation deficient. Two that were examined in detail had internal defects in addition to the expected surface defects. One internal defect was in the enzyme phosphoglucose isomerase. The use of phages to select appropriate mutants should apply generally in any system in which surface components are involved.

UI MeSH Term Description Entries
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D010641 Phenotype The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment. Phenotypes
D001435 Bacteriophages Viruses whose hosts are bacterial cells. Phages,Bacteriophage,Phage
D012231 Rhizobium A genus of gram-negative, aerobic, rod-shaped bacteria that activate PLANT ROOT NODULATION in leguminous plants. Members of this genus are nitrogen-fixing and common soil inhabitants.
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species
D014161 Transduction, Genetic The transfer of bacterial DNA by phages from an infected bacterium to another bacterium. This also refers to the transfer of genes into eukaryotic cells by viruses. This naturally occurring process is routinely employed as a GENE TRANSFER TECHNIQUE. Genetic Transduction,Genetic Transductions,Transductions, Genetic

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