Fig. 4
From: Self-organization of swimmers drives long-range fluid transport in bacterial colonies
Long-range, colony-scale directed transport in a P. mirabilis colony. a–d Image sequence showing the directed transport of 0.1-μm fluorescent microspheres in the inner motile ring around colony edge (“Methods”). Fluorescent images of microspheres were overlaid with phase contrast images of the colony (at low light intensity). Bright blob in the upper part of the images is where the fluorescent microspheres were deposited. Arrows indicate the position of microspheres transported for the longest distance at indicated times; these foremost microspheres are only visible when enlarging the figure or when viewing the associated Supplementary Movie 11. Scale bar, 500 μm. e–h Image sequence showing the directed transport of 0.1-μm fluorescent microspheres inwards along crack-like conduits present near colony edge. The conduits are inside the rectangular area showed in the images. Also see Supplementary Movie 12. Scale bar, 50 μm
