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A ciliate memorizes the geometry of a swimming arena

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/65207

Title: A ciliate memorizes the geometry of a swimming arena
Authors: Kunita, Itsuki Browse this author
Yamaguchi, Tatsuya Browse this author
Tero, Atsushi Browse this author
Akiyama, Masakazu Browse this author
Kuroda, Shigeru Browse this author →ORCID
Nakagaki, Toshiyuki Browse this author →KAKEN DB
Keywords: memory
ion channel
tetrahymena
mathematical modelling
Hodgikin Huxley equation
Issue Date: May-2016
Publisher: Royal Society
Journal Title: Journal of the Royal Society interface
Volume: 13
Issue: 118
Start Page: 20160155
Publisher DOI: 10.1098/rsif.2016.0155
Abstract: Previous studies on adaptive behaviour in single-celled organisms have given hints to the origin of their memorizing capacity. Here we report evidence that a protozoan ciliate Tetrahymena has the capacity to learn the shape and size of its swimming space. Cells confined in a small water droplet for a short period were found to recapitulate circular swimming trajectories upon release. The diameter of the circular trajectories and their duration reflected the size of the droplet and the period of confinement. We suggest a possible mechanism for this adaptive behaviour based on a Ca2+ channel. In our model, repeated collisions with the walls of a confining droplet result in a slow rise in intracellular calcium that leads to a long-term increase in the reversal frequency of the ciliary beat.
Type: article (author version)
URI: http://hdl.handle.net/2115/65207
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中垣 俊之

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