A ciliate memorizes the geometry of a swimming arena

Itsuki Kunita, Tatsuya Yamaguchi, Atsushi Tero, Masakazu Akiyama, Shigeru Kuroda, Toshiyuki Nakagaki

研究成果: ジャーナルへの寄稿学術誌査読

19 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号20160155
ジャーナルJournal of the Royal Society Interface
13
118
DOI
出版ステータス出版済み - 5月 1 2016

!!!All Science Journal Classification (ASJC) codes

  • バイオテクノロジー
  • 生物理学
  • バイオエンジニアリング
  • 生体材料
  • 生化学
  • 生体医工学

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