Reference Report

Reference
Citation	Hu, N., Castelli-Gair, J. (1999). Study of the posterior spiracles of Drosophila as a model to understand the genetic and cellular mechanisms controlling morphogenesis. Dev. Biol. 214(1): 197--210. (Export to RIS)
FlyBase ID	FBrf0111388
Publication Type	Research paper
PubMed ID	10491268
PubMed Abstract	We have studied the posterior spiracles of Drosophila as a model to link patterning genes and morphogenesis. A genetic cascade of transcription factors downstream of the Hox gene Abdominal-B subdivides the primordia of the posterior spiracles into two cell populations that develop using two different morphogenetic mechanisms. The inner cells that give rise to the spiracular chamber invaginate by elongating into "bottle-shaped" cells. The surrounding cells give rise to a protruding stigmatophore by changing their relative positions in a process similar to convergent extension. The genetic cascades regulating spiracular chamber, stigmatophore, and trachea morphogenesis are different but coordinated to form a functional tracheal system. In the posterior spiracle, this coordination involves the control of the initiation of cell invagination that starts in the cells closer to the trachea primordium and spreads posteriorly. As a result, the opening of the tracheal system shifts back from the spiracular branch of the trachea into the posterior spiracle cells. We analyze the contribution of the ems gene to this coordination. In ems mutants, invagination of the spiracle cells adjacent to the trachea does not occur, but more posterior cells of the spiracle invaginate normally. This results in a spiracle without a lumen and with the tracheal opening located outside it.
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Language of Publication	English
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Publication Type	Journal
Abbreviation	Dev. Biol.
Title	Developmental Biology
Publication Year	1959-
ISBN/ISSN	0012-1606
Data from Reference
Aberrations (5)
	Df(2L)32FP-5 Df(2L)GR4 Df(2R)en^E Df(3L)H99 Df(3L)klu^XR19
Alleles (22)
	Abd-B^M1 btl^LG19 ct^db7 dpp^Scer\UAS.cSa Ecol\lacZ^A1-3-10 Ecol\lacZ^A189.2F3 Ecol\lacZ^A495.1M2 Ecol\lacZ^btl-6-81 Ecol\lacZ^ct.A Ecol\lacZ^ct.D Ecol\lacZ^ems.1.2 Ecol\lacZ^esg-B7-2-22 Ecol\lacZ^grh.NB Ecol\lacZ^Scer\UAS.cBa ems² ems³ grh^B32 Khc::nod^{Scer\UAS.T:Ecol\lacZ} salm² Scer\GAL4^arm.PS Scer\GAL4^klu-G410 trh⁸
Constructs (8)
	P{cutA-hsp70-lacZ} P{cutD-hsp70-lacZ} P{ems-lacZ.1.2} P{GAL4-arm.S} P{grh-lacZ.NB} P{UAS-dpp.S} P{UAS-Khc::nod::lacZ} P{UAS-lacZ.B}
Genes (16)
	Abd-B btl crb ct dpp Ecol\lacZ ems en grh Khc::nod klu nub salm Scer\GAL4 T:Ecol\lacZ trh
Insertions (6)
	P{GAL4}klu^G410 P{lacW}A1-3-10 P{lacW}btl^6-81 P{lacW}esg^B7-2-22 P{lArB}A189.2F3 P{lArB}A495.1M2