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Related Experiment Videos

Correlation between torsion and streaming in Physarum.

P Obendorf, R A O'Sullivan

    Experimental Cell Research
    |November 1, 1983
    PubMed
    Summary
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    Torsional oscillations in the slime mould Physarum polycephalum are closely linked to cytoplasmic streaming. The direction of rotational movement follows a left-hand rule relative to the streaming direction.

    Area of Science:

    • Cellular Biology
    • Biophysics

    Background:

    • The slime mould Physarum polycephalum exhibits complex internal dynamics.
    • Understanding the relationship between mechanical forces and cytoplasmic flow is crucial in cell biology.

    Purpose of the Study:

    • To investigate the correlation between torsional oscillations and cytoplasmic streaming in Physarum polycephalum.
    • To determine the relationship between the direction of rotation and streaming.

    Main Methods:

    • Experimental observation of torsional oscillations in slime mould strands.
    • Measurement of cytoplasmic streaming dynamics.

    Main Results:

    • Torsional oscillations were found to be closely correlated with cytoplasmic streaming.

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  • A left-hand rule governs the relationship between rotational direction and streaming direction.

    • Conclusions:

    • The study establishes a direct link between mechanical oscillations and intracellular transport in Physarum polycephalum.
    • The identified left-hand rule provides a quantitative description of this biomechanical relationship.