Fig. 5: Surface-dwelling characteristics of Bt and Pf in the channel: bottom vs. top surface colonization.

Confocal fluorescence intensities of a Bt and b Pf recorded with a focus on the bottom surface (light green (a) and light red (b)) and on the top surface (dark green (a) and dark red (b)). Axial resolutions are 5 and 5.8 µm for FAST and mCherry signals, respectively. c Confocal images recorded at time t = 3 h on the bottom surface (upper panels) and on the top surface (lower panels) for Bt (left panels) and Pf (right panels). The same experimental conditions were used as in Fig. 1.