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Chemotaxis towards sugars by Bacillus subtilis.

G W Ordal, D P Villani, M S Rosendahl

    Journal of General Microbiology
    |November 1, 1979
    PubMed
    Summary
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    Bacillus subtilis exhibits chemotaxis towards various sugars and derivatives, with distinct chemoreceptors for most compounds. Competition experiments reveal complex interactions, indicating specialized sugar detection mechanisms.

    Area of Science:

    • Microbiology
    • Molecular Biology
    • Biochemistry

    Background:

    • Chemotaxis is crucial for bacterial survival and nutrient acquisition.
    • Understanding bacterial chemotaxis mechanisms provides insights into microbial behavior and ecology.

    Purpose of the Study:

    • To identify attractant sugars for Bacillus subtilis.
    • To elucidate the specificity of Bacillus subtilis chemoreceptors through competition assays.

    Main Methods:

    • Capillary assay to measure bacterial attraction to various sugars and derivatives.
    • Competition experiments to determine chemoreceptor specificity and interactions.

    Main Results:

    • Identified numerous attractant sugars for Bacillus subtilis, including glucose, fructose, and maltose.

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  • Glucose chemotaxis was found to be constitutive.
  • Competition experiments revealed specific chemoreceptors for most sugars, with significant instances of non-reciprocal and reciprocal competition, suggesting complex interactions.

    • Conclusions:

    • Bacillus subtilis possesses specific chemoreceptors for a wide range of sugars and derivatives.
    • While most sugars are detected by dedicated receptors, secondary interactions between sugars and chemoreceptors exist, contributing to complex chemotactic responses.