Figure 4.
Experimental images of the opening of the door of Utricularia australis. (a) Initial shape prior opening, (b) 7.6 ms after opening and (c) full opening at 8.6 ms. The height of the door is around 400 µm. It is thicker near top. The pictures are based on light-sheet fluorescence microscopy recording and they are here displayed in grey inversion. (d) The conventions for the position of the centre of the door Z are represented. When the door is closed and the trap is in the ‘ready to capture’ configuration, Z =+Z0. The door is buckling: Z = 0. The curvature of the door is inverted and the door is open: Z =−Z0. (Online version in colour.)