Get access

Swimming behaviour and magnetotaxis function of the marine bacterium strain MO-1

Authors

  • Sheng-Da Zhang,

    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Search for more papers by this author
  • Nikolai Petersen,

    1. Ludwig Maximilians University, Munich, Germany
    Search for more papers by this author
  • Wei-Jia Zhang,

    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    2. State Key Laboratories for Agro-Biotechnology and College of Biological Sciences, China Agricultural University, Beijing, China
    Current affiliation:
    1. MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
    Search for more papers by this author
  • Sébastien Cargou,

    1. Nano Ingénierie et Intégration des Systèmes, Laboratoire d'Analyse et d'Architecture des Systèmes, CNRS, Toulouse Cedex 4, France
    Search for more papers by this author
  • Juanfang Ruan,

    1. Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
    Search for more papers by this author
  • Dorothée Murat,

    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Search for more papers by this author
  • Claire-Lise Santini,

    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Search for more papers by this author
  • Tao Song,

    1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Search for more papers by this author
  • Takayuki Kato,

    1. Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
    Search for more papers by this author
  • Philippe Notareschi,

    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    Search for more papers by this author
  • Ying Li,

    1. State Key Laboratories for Agro-Biotechnology and College of Biological Sciences, China Agricultural University, Beijing, China
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Search for more papers by this author
  • Keiichi Namba,

    1. Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
    Search for more papers by this author
  • Anne-Marie Gué,

    1. Nano Ingénierie et Intégration des Systèmes, Laboratoire d'Analyse et d'Architecture des Systèmes, CNRS, Toulouse Cedex 4, France
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Search for more papers by this author
  • Long-Fei Wu

    Corresponding author
    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    2. Laboratoire International Associé de la Biominéralisation et Nanostructure, CNRS-Marseille, Marseille, France
    Current affiliation:
    1. Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, CNRS, UMR7283, Aix-Marseille Université, Marseille Cedex 20, France
    • For correspondence. E-mail wu@imm.cnrs.fr; Tel. (+33) 4 9116 4157; Fax (+33) 4 91718914.

    Search for more papers by this author

Summary

Magnetotactic bacteria (MTB) have the unique capacity to align and swim along the geomagnetic field lines downward to the oxic–anoxic interface in chemically stratified water columns and sediments. They are most abundant within the first few centimetres of sediments below the water–sediment interface. It is unknown how MTB penetrate into the sediment layer and swim in the pocket water, while their movements are restricted by the alignment along the magnetic field lines. Here we characterized the swimming behaviour of the marine fast-swimming magnetotactic ovoid bacterium MO-1.We found that it rotates around and translates along its short body axis to the magnetic north (northward). MO-1 cells swim forward constantly for a minimum of 1770 μm without apparent stopping. When encountering obstacles, MO-1 cells squeeze through or swim southward to circumvent the obstacles. The distance of southward swimming is short and inversely proportional to the magnetic field strength. Using a magnetic shielding device, we provide direct evidence that magnetotaxis is beneficial to MO-1 growth and becomes essential at low cell density. Environmental implications of the fast-swimming magnetotactic behaviour of magnetococci are discussed.

Get access to the full text of this article

Ancillary