Fig. 2. Lateral tip shape changes during elongation. Growing laterals of various lengths are shown. (A) 3 µm lateral; (B) 9 µm lateral; (C) 17 µm lateral; (D) 29 µm lateral; (E) 40 µm lateral; (F) the distal part of a 71 µm lateral; (G) the distal part of a 123 µm lateral. The line drawing in panel A is a tracing of the outline of the lateral in that panel. The remaining line drawings were made by uniformly stretching the line drawing from A proportional to the growth of the lateral in the panel. Note that simply stretching approximates the change in shape seen with growth. Panels D, E and F are from a time-lapse series of a single lateral as are panels B and C. Panels A and G are from the same experiment and were chosen to widen the range of lengths.