RNAi-mediated knockdown of Jun within the ptc stripe does not change adult wing size (A-B, red, ptc>junRNAi compared to blue, ptc>). RNAi-mediated knockdown of jub does change global wing size (C-D, red, ptc>jubRNAi compared to blue, ptc>). Expression of yki in all wing cells (E-F, red, rn>yki, bskDN compared to blue, rn>) or within the ptc stripe (G-H, red, ptc>bskDN, yki compared to blue, ptc>) rescues wing size following JNK inhibition. RNAi-mediated knockdown or overexpression of yki in ptc cells decreases or enlarges wing size, respectively (I-J, red, ptc>ykiRNAi, blue, ptc>, and K-L, red, ptc>yki, blue, ptc>). (M-N) Inhibition of JNK signaling does not enhance the phenotype of Yki inhibition alone (M, red, ptc>bskDN, ykiRNAi; blue, ptc>ykiRNAi). (O-P) RNAi-mediated knockdown of fj modifies the Yki growth phenotype (O, red, ptc>yki, fjRNAi; blue, ptc>yki). For box plots, whiskers represent maximum and minimum values. ****=p<0.0001. See also Figure 3—figure supplements 1–2.