Abstract
The relationship between mating reactivity and ability of cells to attach to polystyrene Petri dishes was investigated in six species of the ciliated protozoan Paramecium. Mating reactive-dependent attachment to polystyrene surfaces was seen in P. caudatum, P. multimicronucleatum, P. tetraurelia, and P. trichium. Attachment was rarely seen in either mating reactive or non-reactive cells of P. bursaria irrespective of extracellular ion concentration, temperature, and swimming velocity. Induction of attachment occurred in mating reactive cells of P. bursaria by treatment with trypsin. Strong affinity of cells for polystyrene surfaces was seen in P. duboscqui even when they were mating non-reactive or when applied to polystyrene dishes with reduced hydrophobicity. Induction of micronuclear activation by attachment—which was found in P. caudatum—was not observed in attached cells ofthe other species.
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