The Noncell Autonomous Requirement of Proboscipedia for Growth and Differentiation of the Distal Maxillary Palp during Metamorphosis of Drosophila melanogaster

Figure 5

Genetic analysis of the requirement of hh. Panels (A) and (B) are scanning electron micrographs of the effects of clonal loss of HH function generated in flies with the genotype y w; PhspFLP}/+; Pry⁺, neo^r, FRT}82B e hh⁹/Pry⁺, neo^r, FRT}82B Sb^63b M(3)95A² Py⁺, ry⁺}96E. The arrow in panel (A) points to a hh clone in the distal maxillary palp that was marked with Sb⁺ M⁺ bristles and that did not affect growth; the growth of the other three distal maxillary palps in panels (A) and (B) were affected to varying degrees and lacked bristles. Panel (C) is a hh⁹ genetic mosaic in a pb mutant background generated in the genotype y w; PhspFLP}/+; Pry⁺, neo^r, FRT}82B pb²⁷ Scr² e hh⁹/Pry⁺, neo^r, FRT}82B pb²⁰ Sb^63b M(3)95A² Py⁺, ry⁺}96E. The arrows indicate reduced maxillary palpus and the arrowheads indicate the loss of the maxillary palpus in panels (B) and (C). In panel (C) the left vestigial maxillary palpus was missing and remaining vestigial palpus on the right was Sb M (hh⁹/+).