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Fig. 5. Ft regulates PD wing growth and pattern. (A,B) Expression of Dll (red) and Wg (green) in wild-type (A) and in ft^fd mutant (B) wing imaginal discs. Dll is upregulated in the ft mutant discs (B). (C,C') In the posterior (P) wing compartment displaying overexpression of Ft (UAS-ft/en-Gal4), Dll (red in C, grey in C') is downregulated when compared with its anterior (A) compartment or with that of a wild-type counterpart (also see Fig. 8H); the broken line (C') indicates the AP boundary. (D,D') A large ft⁴²² clone, marked by loss of GFP (green), displays upregulated Q-vg-lacZ (red in D and grey in D'). (E) A plot of the intensity of Q-vg-lacZ expression over the wing pouch region (along the red broken line in D') to reveal upregulation of Q-vg-lacZ in the mutant clone along the PD axis. (F,G) Adult wing of a wild type (F) and of genotype en-Gal4/UAS-ft (G). Wing growth along the PD axis in the posterior compartment is truncated (G), as revealed by the close proximity of the anterior and posterior crossveins (arrowheads); AP boundary is indicated by broken lines.

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