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Morphological changes in Escherichia coli subjected to direct current electrical fields.

H W Ellis

    Microbios
    |January 1, 1985
    PubMed
    Summary

    Electrical current exposure elongated rod-shaped Escherichia coli bacteria by up to 25%. Upon current removal or transfer to fresh medium, the bacteria returned to their normal size and distribution.

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    Morphological changes in spherical E. coli induced by a DC electrical field.

    Microbios·1985
    See all related articles

    Area of Science:

    • Microbiology
    • Cell Biology
    • Bioelectricity

    Background:

    • Escherichia coli (E. coli) are common rod-shaped bacteria.
    • Bacterial morphology is crucial for various cellular functions.
    • Understanding external influences on bacterial shape is important.

    Purpose of the Study:

    • To investigate the effect of direct current (DC) electricity on the morphology of rod-shaped Escherichia coli.
    • To determine if observed morphological changes are reversible.

    Main Methods:

    • Culturing rod-shaped Escherichia coli in a liquid minimal salts medium.
    • Applying a 20 mA direct current through the bacterial culture.
    • Observing changes in bacterial length and distribution using microscopy.
    • Assessing reversibility by removing the current or transferring cells to fresh medium.

    Main Results:

    • Exposure to 20 mA DC caused a significant elongation of Escherichia coli, increasing their length by up to 25%.
    • The elongated bacteria returned to their original size and distribution after the electrical current was removed.
    • Reversion to original morphology was also observed when treated cells were transferred to fresh medium without current.

    Conclusions:

    • Direct current electricity can reversibly alter the physical dimensions of rod-shaped Escherichia coli.
    • Bacterial cell shape is sensitive to electrical stimulation.
    • Further research could explore the mechanisms underlying electro-morphological responses in bacteria.

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