Figure 1. Regeneration in wing-imaginal discs.
(A) Regeneration following physical fragmentation of a disc that has been implanted in an adult abdomen. Wound healing (gray arrows) is facilitated by actin cables and filopodia in regions of JNK activation (green). Damaged-induced proliferation (red) occurs prior to the completion of wound healing.
(B) Genetic ablation of tissue in the wing disc. Expression of a pro-apoptotic gene (blue) during the ablation phase (30°C) eliminates most of the pouch. Regenerative growth restores the pouch that can differentiate into a wing of normal size and shape.
(C) Summary of regulators implicated in imaginal disc regeneration.