Ablation-induced ingrowth of adjacent ddaC.A, ddaC was ablated at 20 hr AEL in the embryo ofNP7028 GFP[S65T]/GFP[S65T] and observed 2 d later. Dendrites of adjacent ddaCs broke through the neutral zones (brackets) and invaded the area that was normally covered by the ablated homolog (arrows). Arrowhead points at an unknown cell.B, C, Positions of dendritic terminals of ddaC were plotted in illustrations of the hemisegment. Each dot represents a single terminal. B, Positions of terminals in the control larva. Orange dots indicate dendritic ends of ddaC in the middle (circle). Violet dots and green dots indicate ends of an anterior adjacent ddaC and a posterior adjacent ddaC, respectively.C, Positions of terminals of adjacent ddaCs when ddaC in the middle (circle with a broken line) was ablated. Violet dots on the left and green ones on the right are as described in B.D, All of the DA neurons in the dorsal cluster except for ddaC were ablated in embryos homozygous for 109(2)80 GFP[S65T] at 16–17 hr AEL, and observed 2 d later. In the middle hemisegment, only ddaC was left. Brackets indicate the neutral zones and dendrites of adjacent hemisegments did not transgress the borders. Scale bars: A, D, 50 μm.