FIGURE 7.

Chemotactic rings formed by different P. tricornutum culture treatments. Autoclaved algae, a portion of the algal cells were treated at 121°C; ultrasonicated algae, a portion of the algal cells subjected to ultrasonic cell disruption; algae, an algal cell pellet obtained from centrifugation; supernatant, culture liquid obtained after centrifugation; BIAL, new BIAL produced by adding BIAL to P. tricornutum cultures; H₂O, the negative control. All error bars indicate the SE of the three biological replicates. Significant difference were based on the pair comparison between BIAL and the other treatment. ^∗p < 0.05 and ^∗∗p < 0.01 represent significant differences compared to the control cells.