Asymmetric swimming motion of singly flagellated bacteria near a rigid surface

Tomonobu Goto, Seishi Kudo, Yukio Magariyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper gives an overview of consecutive studies on the asymmetrical motion of Vibrio alginolyticus cells, which possess a single polar flagellum. Inertial forces are negligible because of the cell size and the motion is expected to be symmetrical. However, asymmetrical characteristics between forward and backward motions were observed. The asymmetry observed in trajectory, swimming speed, and residence time appears only when a cell swims close to a surface. In backward motion, a cell traces circular path, while in forward motion the cell moves in a straight line. The backward swimming speed is faster than the forward speed. Backward swimming cells tend to stay close to a surface longer than forward swimming cells do. An explanation for these asymmetrical characteristics is given based on the results of boundary element analyses of creeping flow around a cell model that consists of a cell body and a rotating flagellum. According to the explanation, the attitude of a cell relative to a surface produces the asymmetry. The studies presented here indicate that the fluid-dynamic interaction between bacterial cells and a surface produces the unexpected asymmetrical motion. This asymmetry may help cells search for preferable states on a surface or to attach to the surface.

Original languageEnglish
Title of host publicationBio-Mechanisms of Swimming and Flying
Subtitle of host publicationFluid Dynamics, Biomimetic Robots, and Sports Science
PublisherSpringer Tokyo
Pages3-15
Number of pages13
ISBN (Print)9784431733799
DOIs
Publication statusPublished - 2008 Jan 1
Event3rd International Symposium on Aero Aqua Bio-Mechanisms, ISABMEC 2006 - Okinawa, Japan
Duration: 2006 Jul 32006 Jul 7

Publication series

NameBio-Mechanisms of Swimming and Flying: Fluid Dynamics, Biomimetic Robots, and Sports Science

Other

Other3rd International Symposium on Aero Aqua Bio-Mechanisms, ISABMEC 2006
CountryJapan
CityOkinawa
Period06/7/306/7/7

Keywords

  • Asymmetry
  • Bacterial motion
  • Boundary element analysis
  • Creeping flow
  • Fluid-dynamic interaction
  • Swimming speed
  • Trajectory

ASJC Scopus subject areas

  • Biomedical Engineering

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