Figure 8.

Glycine modulate locomotion in Trichoplax adhaerens. (A) Tracks of animals incubated for 1 h in 0.3 mM glycine (right) and ASW (left). After adding glycine, incubation tracks are squigglier than the control, but their length is unchanged. Tracks were recorded for 60 min. (B) and (C) Glycine modulates turn patterns but does not affect locomotory speed. Diagrams of track straightness (B), path length divided by distance between start and end) and crawling speed (C), (mm/min) for the control, 0.1 and 0.3 mM glycine. Glycine decreases track straightness but does not affect locomotion speed. Asterisks denote a significant difference in track straightness from the control (Welch t-test, ^*p < 0.05, ^**p < 0.01). All three speed values are not different (Welch t-test, value of p > 0.05). N animals = 64, 24, and 25, respectively.