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(A) Light emission profile of a horizontal transect through the P. fluorescens HK44-colonized zone at a depth of 15 cm (day 3). a, colonized region; b, light emission from the lantern effect. (B). Daily areal expansion of the colonized zone. Shaded regions (1 to 7) represent the newly colonized area on each day. The dashed line illustrates the apparent boundary of the colonized region on day 7 if uncorrected for the lantern effect.
