Dynamics of Pseudomonas putida biofilms in an upscale experimental framework

J Ind Microbiol Biotechnol. 2018 Oct;45(10):899-911. doi: 10.1007/s10295-018-2070-0. Epub 2018 Aug 21.


Exploitation of biofilms for industrial processes requires them to adopt suitable physical structures for rendering them efficient and predictable. While hydrodynamics could be used to control material features of biofilms of the platform strain Pseudomonas putida KT2440 there is a dearth of experimental data on surface-associated growth behavior in such settings. Millimeter scale biofilm patterns formed by its parental strain P. putida mt-2 under different Reynolds numbers (Re) within laminar regime were analyzed using an upscale experimental continuous cultivation assembly. A tile-scan image acquisition process combined with a customized image analysis revealed patterns of dense heterogeneous structures at Re = 1000, but mostly flattened coverings sparsely patched for Re < 400. These results not only fix the somewhat narrow hydrodynamic regime under which P. putida cells form stable coatings on surfaces destined for large-scale processes, but also provide useful sets of parameters for engineering catalytic biofilms based on this important bacterium as a cell factory.

Keywords: Biofilm; Image analysis; Pseudomonas putida; Reynolds number; Upscale experimental device.

MeSH terms

  • Algorithms
  • Biofilms / growth & development*
  • Culture Media
  • Equipment Design
  • Hydrodynamics
  • Image Processing, Computer-Assisted
  • Industrial Microbiology / methods
  • Polycarboxylate Cement / chemistry
  • Pseudomonas putida / growth & development*
  • Software


  • Culture Media
  • Polycarboxylate Cement
  • polycarbonate