Effect of light and temperature on bacterial motility.

<p>Cells of different species within the genus <i>Acinetobacter</i> were inoculated on the surface of swimming plates. Plates were inspected and photographed after incubated overnight in darkness (D) or in the presence of blue light (BL), green light (GL) or red light (RL) at 24°C or 37°C. Only some strains displaying photoregulated motility are shown.