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Temperature effects on bacterial movement.

W R Schneider, R N Doetsch

    Applied and Environmental Microbiology
    |December 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Bacterial motility increases significantly with temperature. Bacteria exhibit distinct behavioral responses to rapid temperature changes, showing adaptation to their growth environment.

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    Area of Science:

    • Microbiology
    • Biophysics
    • Bacterial Physiology

    Background:

    • Bacterial motility is crucial for survival and colonization.
    • Understanding how environmental factors like temperature influence bacterial movement is essential.

    Purpose of the Study:

    • To investigate the effect of precise temperature control on bacterial motile behavior.
    • To quantify changes in bacterial velocity across a temperature gradient.
    • To observe behavioral responses to acute temperature shifts.

    Main Methods:

    • Construction of a precision temperature-controlled chamber.
    • Observation of motile bacterial species across a temperature range (10-50°C).
    • Analysis of bacterial translational velocity and behavioral responses to temperature jumps.

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    Main Results:

    • Bacterial translational velocity increased five- to sevenfold from 10°C to 50°C, irrespective of prior incubation temperature.
    • Downward temperature shifts induced transient tumbling or reciprocal behavior.
    • Upward temperature shifts led to accelerated velocity without tumbling or reversal.
    • Organisms grown at sub-optimal temperatures exhibited higher velocities at observation temperatures, indicating partial adaptation.

    Conclusions:

    • Temperature is a significant determinant of bacterial swimming speed.
    • Bacteria display specific behavioral responses to thermal stress, including motility changes and adaptation.
    • The developed temperature-controlled chamber facilitates detailed studies of bacterial chemotaxis and behavior.