The predominant orientation of cilia in glycerol-extracted Paramecium is toward the posterior of the specimen in a KCl solution. The cilia became reoriented toward the anterior shortly after transfer of the extracted cell to a mixture of ATP, calcium, and zinc. The degree of response was graded as a function of the concentration of each of the three essential factors. Minimum concentrations for the maximum response were 0.2 mM in ATP, 0.8 mM in calcium, and 0.0002 mM in zinc. The observations support the hypothesis that cation-induced ciliary reversal in live specimens is initiated by calcium ions which become displaced from an inferred cellular cation exchanger system.
Article| May 01 1969
Control of the Orientation of Cilia by Adenosinetriphosphate, Calcium, and Zinc in Glycerol-Extracted Paramecium caudatum
From the Zoological Institute, Faculty of Science, University of Tokyo, Tokyo, Japan.
Dr. Naitoh's present address is the Department of Zoology, University of California, Los Angeles, California 90024
Received: November 11 1968
Online Issn: 1540-7748
Print Issn: 0022-1295
Copyright © 1969 by The Rockefeller University Press
- Views Icon Views
- PDF LinkPDF
- Share Icon Share
- Search Site
Yutaka Naitoh; Control of the Orientation of Cilia by Adenosinetriphosphate, Calcium, and Zinc in Glycerol-Extracted Paramecium caudatum . J Gen Physiol 1 May 1969; 53 (5): 517–529. doi: https://doi.org/10.1085/jgp.53.5.517
Download citation file: