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  Flow-driven instabilities during pattern formation of Dictyostelium discoideum

Gholami, A., Steinbock, O., Zykov, V., & Bodenschatz, E. (2015). Flow-driven instabilities during pattern formation of Dictyostelium discoideum. New Journal of Physics, 17(1): 063007. doi:10.1088/1367-2630/17/6/063007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-7DAE-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-D708-3
Genre: Journal Article

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 Creators:
Gholami, A.1, Author              
Steinbock, O., Author
Zykov, V.1, Author              
Bodenschatz, E.1, Author              
Affiliations:
1Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063287              

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Free keywords: pattern formation, flow-driven instability, Dictyostelium discoideum
 Abstract: The slime mold Dictyostelium discoideum is a well known model system for the study of biological pattern formation. In the natural environment, aggregating populations of starving Dictyostelium discoideum cells may experience fluid flows that can profoundly change the underlying wave generation process. Here we study the effect of advection on the pattern formation in a colony of homogeneously distributed Dictyostelium discoideum cells described by the standard Martiel�Goldbeter model. The external flow advects the signaling molecule cyclic adenosine monophosphate (cAMP) downstream, while the chemotactic cells attached to the solid substrate are not transported with the flow. The evolution of small perturbations in cAMP concentrations is studied analytically in the linear regime and by corresponding numerical simulations. We show that flow can significantly influence the dynamics of the system and lead to a flow-driven instability that initiate downstream traveling cAMP waves. We also show that boundary conditions have a significant effect on the observed patterns and can lead to a new kind of instability.

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Language(s): eng - English
 Dates: 2015-06-08
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1367-2630/17/6/063007
BibTex Citekey: Gholami.Steinbock.ea2015a
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Title: New Journal of Physics
Source Genre: Journal
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Pages: 14 Volume / Issue: 17 (1) Sequence Number: 063007 Start / End Page: - Identifier: -