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Potassium: A factor necessary for the expression of mating reactivity inParamecium caudatum

Authors
Journal
Experimental Cell Research
0014-4827
Publisher
Elsevier
Publication Date
Volume
85
Issue
1
Identifiers
DOI: 10.1016/0014-4827(74)90208-0

Abstract

Abstract Potassium ions are necessary for the expression of mating reactivity of Paramecium caudatum. Loss of mating reactivity as a result of lack of potassium ions in the external medium is a reversible phenomenon; by resuspending in a medium containing more than 0.01 mM KCl, reactivity is restored. This effect of potassium ions is neither inhibited by ouabain nor replaced with NH + and Cs +. The process of loss and restoration of mating reactivity suggests that potassium ions are not necessary for the maintenance or activation of the mating-type substances on the cilia but are concerned with translocation of the mating-type substances from inside of the cells to cilia.

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