Hybrid sideways/longitudinal swimming in the monoflagellate Shewanella oneidensis: from aerotactic band to biofilm
journal contributionposted on 02.11.2020, 14:54 by Laura Stricker, Isabella Guido, Thomas Breithaupt, Marco MazzaMarco Mazza, Jürgen Vollmer
Shewanella oneidensis MR-1 are facultative aerobic electroactive bacteria with an appealing potential for sustainable energy production and bioremediation. They gather around air sources, forming aerotactic bands and biofilms. Here, we experimentally follow the evolution of the band around an air bubble, and we find good agreement with the numerical solutions of the pertinent transport equations. Video microscopy reveals a transition between motile and non-motile MR-1 upon oxygen depletion, preventing further development of the biofilm. We discover that MR-1 can alternate between longitudinal fast and sideways slow swimming. The resulting bimodal velocity distributions change in response to different oxygen concentrations and gradients, supporting the biological functions of aerotaxis and confinement.
People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007- 2013/under REA grant agreement no. 628154, from the MaxSynBio Consortium which is jointly funded by the Federal Ministry of Education and Research of Germany and the Max Planck Society, and from the Deutsche Forschungsgemeinschaft (SFB 937, project A20)
- Mathematical Sciences