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Related Experiment Videos

General transduction in Rhizobium meliloti.

T M Finan, E Hartweig, K LeMieux

    Journal of Bacteriology
    |July 1, 1984
    PubMed
    Summary

    This study details phage phi M12 transduction in Rhizobium meliloti, demonstrating cotransduction and Tn5 insertion mapping. Phage phi M12 DNA is approximately 160 kilobases, similar to E. coli phage T4.

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    Area of Science:

    • Microbiology
    • Molecular Biology
    • Genetics

    Background:

    • Rhizobium meliloti is a key nitrogen-fixing bacterium.
    • Bacteriophages are viruses that infect bacteria and can be used as tools in molecular biology.

    Purpose of the Study:

    • To investigate the general transduction capabilities of phage phi M12 in Rhizobium meliloti.
    • To map specific genetic loci using Tn5 insertions and cotransduction.
    • To characterize the phage phi M12 genome.

    Main Methods:

    • General transduction experiments using phage phi M12 and Rhizobium meliloti SU47.
    • Cotransduction analysis to determine genetic linkage.
    • Selection for Tn5 insertions.
    • Restriction endonuclease analysis of phage DNA.

    Main Results:

    • Phage phi M12 successfully transduced genetic material in Rhizobium meliloti SU47.
    • Cotransduction and selection for Tn5 insertions linked to specific loci were achieved.
    • A recA::Tn5 mutant derivative could be transduced for plasmid R68.45 but not chromosomal alleles.
    • Phage phi M12 DNA size was estimated at 160 kilobases, with morphological similarity to E. coli phage T4.

    Conclusions:

    • Phage phi M12 is a viable tool for genetic manipulation and mapping in Rhizobium meliloti.
    • The recA allele affects chromosomal but not plasmid transduction.
    • Phage phi M12 possesses a genome size comparable to other T4-like phages.

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