scalloped functions in a regulatory loop with vestigial and wingless to pattern the Drosophila wing View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-01

AUTHORS

Sujata Varadarajan, K. VijayRaghavan

ABSTRACT

The development of the Drosophila wing involves progressive patterning events. In the second larval instar, cells of the wing disc are allotted wing or notum fates by a wingless-mediated process and dorsal or ventral fates by the action of apterous and wingless. Notch-mediated signalling is required for the expression of the genes vestigial and scalloped in the presumptive wing blade. Later, wingless, Notch and cut are involved in cell fate specification along the wing margin. The function of scalloped in this process is not well understood and is the focus of this study.We show that patterning downstream of Notch and wingless pathways is altered in scalloped mutants. Reduction in scalloped expression results in a loss of expression of wing blade- and margin-specific markers. Misexpression of scalloped in the presumptive wing causes misexpression of scalloped, vestigial and wingless reporter genes. However, high levels of scalloped expression have a negative influence on wingless, vestigial and its own expression. Our results demonstrate that scalloped functions in a level-dependent manner in the presumptive wing blade in a loop that involves vestigial and itself. We suggest that wing development requires the regulated expression of scalloped together with vestigial–the ”wing formation” effects of Vestigial in other imaginal discs are probably due to its interaction with the scalloped gene product normally expressed in these discs. More... »

PAGES

10-17

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s004270050222

DOI

http://dx.doi.org/10.1007/s004270050222

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030236343

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/9914414


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