Summary
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1.
Cells ofDictyostelium discoideum grow exponentially when cultivated in suspension. The generation time is 3,3 hrs (20° C).
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2.
In all stages of their development the cells can agglutinate spontaneously. Agglutinates in a certain developmental stage undergo immediate transformation into fruiting bodies, if they can make contact with the liquid/air interphase. This contact induces the polarity of the fruiting bodies. Autonomous polarization does not occur. Bilateral interphase contact induces twin fruiting bodies pointing in opposite directions.
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3.
Weakening of intercellular contacts results in a reduction of the average size of the agglutinates and can thus be recognized easily under standardized conditions. This was shown to be the case for two morphologically deficient mutants.
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Gerisch, G. Zellfunktionen und Zellfunktionswechsel in der Entwicklung vonDictyostelium discoideum . W. Roux' Archiv f. Entwicklungsmechanik 152, 632–654 (1960). https://doi.org/10.1007/BF00582043
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DOI: https://doi.org/10.1007/BF00582043