Organising activities of engrailed, hedgehog, wingless and decapentaplegic in the genital discs of Drosophila melanogaster

The genes engrailed (en), hedgehog (hh), wingless (wg) and decapentaplegic (dpp) have been shown to play vital organising roles in the development and differentiation of thoracic imaginal discs. We have analysed the roles of these genes in organising the development and differentiation of the genita...

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Veröffentlicht in:Development genes and evolution 1998-11, Vol.208 (9), p.504-516
Hauptverfasser: Emerald, B S, Roy, J K
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Roy, J K
description The genes engrailed (en), hedgehog (hh), wingless (wg) and decapentaplegic (dpp) have been shown to play vital organising roles in the development and differentiation of thoracic imaginal discs. We have analysed the roles of these genes in organising the development and differentiation of the genital discs, which are bilaterally symmetrical and possess different primordia, namely, the male and female genital primordia and an anal primordium. Our results suggest that the organising activity of en in genital discs programs the normal development and differentiation of the genital disc by regulating the expression of hh. Hh in turn induces wg and dpp, the genes whose products act as secondary signalling molecules. Moreover, the complementary patterns of wg and dpp expression are essential for the bilateral symmetry and are maintained by mutual repression.
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subjects Animals
Cell Differentiation
Drosophila melanogaster
Drosophila melanogaster - genetics
Drosophila melanogaster - growth & development
Drosophila Proteins
Female
Genitalia - cytology
Genitalia - growth & development
Hedgehog Proteins
Homeodomain Proteins - genetics
Insect Proteins - genetics
Male
Proto-Oncogene Proteins - genetics
Transcription Factors - genetics
Wnt1 Protein
title Organising activities of engrailed, hedgehog, wingless and decapentaplegic in the genital discs of Drosophila melanogaster
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