Fig. 5: Bacterial motility coefficient and surface cell concentration on top and bottom surfaces. | npj Biofilms and Microbiomes

Fig. 5: Bacterial motility coefficient and surface cell concentration on top and bottom surfaces.

From: Microfluidics unveils role of gravity and shear stress on Pseudomonas fluorescens motility and biofilm growth

Fig. 5

Relationship between bacterial motility (μ\muμ) and surface cell concentration (cells/mm²) for the top (red) and bottom (black) walls of the microfluidic channel. A decreasing trend in motility is observed as cell density increases, confirming that overcrowding hampers bacterial movement. This effect is more pronounced at the bottom wall, where gravity-driven sedimentation results in higher local cell accumulation. Dashed vertical grey lines indicate the estimated surface cell densities after 2 h under stagnant conditions.

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