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Synchronous cell differentiation in Caulobacter crescentus.

H Iba, A Fukuda, Y Okada

    Japanese Journal of Microbiology
    |December 1, 1975
    PubMed
    Summary
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    A new method synchronizes Caulobacter crescentus growth, accumulating 80% swarmer cells. These cells initiate synchronous growth and differentiation upon dilution, with altered phage susceptibility suggesting pili loss.

    Area of Science:

    • Microbiology
    • Cell Biology
    • Bacteriology

    Background:

    • Caulobacter crescentus is a model organism for studying cell cycle and differentiation.
    • Synchronizing bacterial growth is crucial for detailed analysis of cellular processes.
    • Previous synchronization methods for Caulobacter crescentus were less efficient or reproducible.

    Purpose of the Study:

    • To develop and validate a novel, easy, and reproducible method for synchronizing Caulobacter crescentus.
    • To investigate the physiological state of synchronized swarmer cells.
    • To correlate cell differentiation with phage susceptibility in synchronized cultures.

    Main Methods:

    • Culturing Caulobacter crescentus in nutrient broth at 30°C with aeration to late log phase.
    • Accumulating swarmer cells (up to 80% of the population).

    Related Experiment Videos

  • Inoculating the accumulated swarmer cells into fresh, pre-warmed broth at a twentyfold dilution.
  • Monitoring synchronous growth and differentiation via RNA phage infection susceptibility.

    • Main Results:

    • The new method reliably synchronizes Caulobacter crescentus cell growth and differentiation.
    • Synchronized swarmer cells exhibit immediate initiation of cell growth upon dilution.
    • Late log phase swarmer cells show altered RNA phage susceptibility, indicating potential pili loss.

    Conclusions:

    • The described method provides an efficient means for obtaining synchronized Caulobacter crescentus cultures.
    • Synchronized swarmer cells are suitable for studying cell cycle-dependent events.
    • The observed changes in phage susceptibility suggest a role for pili in Caulobacter crescentus differentiation.