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Unstable generalized transduction in Achromobacter.

D R Woods, J A Thomson

    Journal of General Microbiology
    |May 1, 1975
    PubMed
    Summary
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    Researchers successfully transduced auxotrophic markers in a halotolerant Achromobacter strain using alpha phages. This study reveals unstable transductants and spontaneous phage liberation, suggesting a cryptic lysogenic relationship.

    Area of Science:

    • Microbiology
    • Bacteriology
    • Virology

    Background:

    • Halotolerant bacteria, such as Achromobacter, play roles in various environments.
    • Bacteriophages are viruses that infect bacteria and can be used as tools in genetic studies.
    • Transduction is a mechanism of horizontal gene transfer mediated by bacteriophages.

    Purpose of the Study:

    • To investigate the potential of generalized transduction in a halotolerant, collagenolytic Achromobacter strain.
    • To characterize the nature of transductants and their stability.
    • To explore the phage-host interactions within this Achromobacter strain.

    Main Methods:

    • Transduction experiments using six auxotrophic markers and four alpha phages.
    • Demonstration of abortive transduction.

    Related Experiment Videos

  • Analysis of transductant stability and spontaneous phage liberation.
  • Assessment of phage sensitivity (efficiency of plating) in transductants.

    • Main Results:

    • Successful transduction of six auxotrophic markers in Achromobacter by alpha phages.
    • Unstable transductants were observed, indicating a potential lysogenic relationship.
    • Spontaneous liberation of phages from purified transductant clones occurred.
    • The host ranges of spontaneously liberated phages differed from the initial transducing phage.
    • Some resistant transductants showed decreased resistance after repeated cloning.

    Conclusions:

    • A generalized transduction system was established for a halotolerant Achromobacter strain.
    • The instability of transductants suggests a cryptic lysogenic state of the Achromobacter strain for alpha phage.
    • Spontaneous phage release and altered phage host ranges indicate complex phage-Achromobacter interactions.