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Related Experiment Videos

A second growth state for Schizosaccharomyces pombe.

H E Kubitschek, K B Clay

    Experimental Cell Research
    |July 1, 1986
    PubMed
    Summary

    Schizosaccharomyces pombe exhibits two distinct cell growth patterns under varying osmolality conditions. A second regulatory system controls linear growth at lower osmolalities, differing from biphasic growth.

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    Area of Science:

    • Cell Biology
    • Microbiology
    • Biophysics

    Background:

    • Cell volume regulation is crucial for microbial growth.
    • Schizosaccharomyces pombe (S. pombe) is a model organism for studying cell cycle and growth.
    • Previous studies reported biphasic growth patterns in S. pombe at high osmolalities.

    Purpose of the Study:

    • To investigate cell volume kinetics in S. pombe at lower osmolalities.
    • To identify and characterize different cell growth patterns.
    • To elucidate the regulatory mechanisms underlying these growth patterns.

    Main Methods:

    • Phase microscopy was used to monitor individual cell volume changes.
    • Cells were cultured at various osmolalities (400-550 mmol/kg).
    • Cell length and diameter were measured to analyze growth regulation.

    Main Results:

    • At 550 mmol/kg, all cells showed biphasic volume increase.
    • At 400-420 mmol/kg, many cells displayed linear volume increase.
    • Linear growth involved coordinated increases in cell length and diameter, unlike biphasic growth.

    Conclusions:

    • A second regulatory system for cell growth in S. pombe operates at lower osmolalities.
    • Distinct growth states (biphasic vs. linear) exist in S. pombe.
    • These growth states are closely related and can transition between generations.

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