繊毛虫Stylonychiaの棘毛逆転打

概要

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Using Stylonychia pustulata, some experiments were performed on the reversal action of cirri induced by treatment with calcium and potassium ions, and on the relation of the reversal action of cirri to the macronuclei and the neuromotorium. 1. When a well pre-adapted organism in various concentrations of calcium chloride was put into the mixtures of different ratios of calcium and potassium chloride solution (experimental solution), the reversal actioon of cirri was induced only in high concentration (1/75 M CaCl_2 and 1/50 M KCl) and in the specific ratios of calcium and potassium ions (1:5, 1:10, 1:15). This fact seems to show that the induction of the reversal action of cirri is difficult in this species as compared with Paramecium and Spirostomum. 2. In the organism whose neuromotorium was cut off or destroyed, the reversal action of cirri was induced easily in any kinds of experimental solution. The reversal action of cirri was induced only by the destruction of neuromotorium, notwithstanding the existence of the macronuclei, that is, in such a case, it equally occurred in either amacronucleated or macronucleated fragments. 3. It is difficult at the present time to explain in detail an orderly sequence of its mechanism, but it can be proved that neuromotorium is not the receptor of the reversal action of cirri but the strong restrainer of it.
社団法人日本動物学会の論文
1959-08-15