Reference Report

Reference
Citation	O'Keefe, D.D., Thomas, J.B. (2001). Drosophila wing development in the absence of dorsal identity. Development 128(5): 703--710. (Export to RIS)
FlyBase ID	FBrf0134576
Publication Type	Research paper
PubMed ID	11171395
PubMed Abstract	The developing wing disc of Drosophila is divided into distinct lineage-restricted compartments along both the anterior/posterior (A/P) and dorsal/ventral (D/V) axes. At compartment boundaries, morphogenic signals pattern the disc epithelium and direct appropriate outgrowth and differentiation of adult wing structures. The mechanisms by which affinity boundaries are established and maintained, however, are not completely understood. Compartment-specific adhesive differences and inter-compartment signaling have both been implicated in this process. The selector gene apterous (ap) is expressed in dorsal cells of the wing disc and is essential for D/V compartmentalization, wing margin formation, wing outgrowth and dorsal-specific wing structures. To better understand the mechanisms of Ap function and compartment formation, we have rescued aspects of the ap mutant phenotype with genes known to be downstream of Ap. We show that Fringe (Fng), a secreted protein involved in modulation of Notch signaling, is sufficient to rescue D/V compartmentalization, margin formation and wing outgrowth when appropriately expressed in an ap mutant background. When Fng and alphaPS1, a dorsally expressed integrin subunit, are co-expressed, a nearly normal-looking wing is generated. However, these wings are entirely of ventral identity. Our results demonstrate that a number of wing development features, including D/V compartmentalization and wing vein formation, can occur independently of dorsal identity and that inter-compartmental signaling, refined by Fng, plays the crucial role in maintaining the D/V affinity boundary. In addition, it is clear that key functions of the ap selector gene are mediated by only a small number of downstream effectors.
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Language of Publication	English
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Publication Type	Journal
Abbreviation	Development
Title	Development
Publication Year	1987-
ISBN/ISSN	0950-1991
Data from Reference
Alleles (10)
	ap^md544 ap^rK568 ap^ts78j ap^UGO35 ap^unspecified Ecol\lacZ^ap-rK568 fng^EP3082 fng^Scer\UAS.cKa mew^Scer\UAS.cWa Scer\GAL4^ap-md544
Constructs (2)
	P{UAS-fng.K} P{UAS-mew.W}
Genes (8)
	ap Dl Ecol\lacZ en fng mew Scer\GAL4 wg
Insertions (3)
	P{EP}fng^EP3082 P{GawB}ap^md544 P{PZ}ap^rK568