Traveling Pulses for a Two-Species Chemotaxis Model
Fig 3
Kymographs showing the wave behavior for different bacterial compositions.
ϕred corresponds to the ratio of red bacteria over the total number of bacteria at the beginning of an experiment. (A) Experimental result obtained with ϕred = 10%. (B) Experimental result obtained with ϕred = 90%. (C) Simulation based on our model with ϕred = 10%. (D) Simulation with ϕred = 90%. The white rectangle in the lower left corner corresponds to the size of images A, B and C. In this case, the simulation is extended to show what happens at longer timescales (beyond the transitory regime so that the peaks are well separated). The small shift between the green and the red fronts in A and B (less visible in the insets) is due to the fact that while acquiring the images, we switch between the green and the red fluorescence channels every minute. Insets: typical concentration profiles (corresponding to bacteria concentration profiles along the white dashed line for each kymograph). We normalized the green and the red peaks (so that the maximum value is one). The length of the the horizontal axis on the profile plots is 1.3 cm (this corresponds to the length of the dashed lines on the kymographs).