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  Adhesion of Chlamydomonas microalgae to surfaces is switchable by light

Kreis, C. T., Le Blay, M., Linne, C., Makowski, M., & Bäumchen, O. (2018). Adhesion of Chlamydomonas microalgae to surfaces is switchable by light. Nature Physics, 14(1), 45-49. doi:10.1038/nphys4258.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-F42D-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-CF03-1
Genre: Journal Article

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 Creators:
Kreis, Christian Titus1, Author              
Le Blay, Marine1, Author              
Linne, Christine1, Author              
Makowski, Marcin1, Author              
Bäumchen, Oliver1, Author              
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1Group Dynamics of fluid and biological interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063300              

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 Abstract: Microalgae are photoactive microbes that live in liquid-infused environments, such as soil, temporary pools and rocks, where they encounter and colonize a plethora of surfaces. Their photoactivity manifests itself in a variety of processes, including light-directed motility (phototaxis)1, 2, 3, the growth of microalgal populations4, and their photosynthetic machinery5. Although microbial responses to light have been widely recognized, any influence of light on cell–surface interactions remains elusive. Here, we reveal that the unspecific adhesion of microalgae to surfaces can be reversibly switched on and off by light. Using a micropipette force spectroscopy technique, we measured in vivo single-cell adhesion forces and show that the microalga’s flagella provide light-switchable adhesive contacts with the surface. This light-induced adhesion to surfaces is an active and completely reversible process that occurs on a timescale of seconds. Our results suggest that light-switchable adhesiveness is a natural functionality of microalgae to regulate the transition between the planktonic and the surface-associated state, which yields an adhesive adaptation to optimize the photosynthetic efficiency in conjunction with phototaxis.

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Language(s): eng - English
 Dates: 2017-09-252018-01
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/nphys4258
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Title: Nature Physics
Source Genre: Journal
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Pages: - Volume / Issue: 14 (1) Sequence Number: - Start / End Page: 45 - 49 Identifier: ISSN: 1745-2473