Morphogenesis in the embryo ofDrosophila melanogaster ? Germ band extension
- 1 January 1980
- journal article
- research article
- Published by Springer Science and Business Media LLC in Wilhelm Roux' Archiv für Entwicklungsmechanik der Organismen
- Vol. 188 (3), 163-177
- https://doi.org/10.1007/bf00849045
Abstract
Changes at the ultrastructural level during germ band extension in the embryo ofDrosophila melanogaster are described. Cytoplasmic connections between cells and the yolk sac are present during initial cellular movements. At this time, a continuous system of microfilaments is present adjacent to the membranes in the connections and at the periphery of the yolk sac. As germ band extension progresses, this system becomes discontinuous, and microfilaments are apparent only in the immediate vicinity of the connections. Cytoplasmic connections are disassembled at approximately the midpoint of extension; at the same time, extensive membrane associations develop between germ band cells and between these cells and adjacent yolk sac membranes. Positioning and orientation of cytoplasmic connections suggest that the yolk sac, via these connections, is actively involved in the cellular movements of early germ band extension.Keywords
This publication has 25 references indexed in Scilit:
- Intercellular junctions during development and in tissue cultures ofDrosophila melanogaster: An electron-microscopic studyWilhelm Roux' Archiv für Entwicklungsmechanik der Organismen, 1979
- Nuclear elongation and cytokinesis in Drosophila montanaDevelopmental Biology, 1971
- Microtubules and microfilaments in newt neurulationDevelopmental Biology, 1971
- A study of fixation of early amphibian embryos for electron microscopyJournal of Ultrastructure Research, 1971
- Morphogenetic movements and segmentation of posterior egg fragmentsin vitroWilhelm Roux' Archiv für Entwicklungsmechanik der Organismen, 1968
- Cytoplasmic filaments and cell movements: Epidermal cells during ascidian metamorphosisJournal of Ultrastructure Research, 1966
- Schichtenbau und Segmentierung junger Keimanlagen vonBombyx mori L. (Lepidoptera) in vitro ohne DottersystemWilhelm Roux' Archiv für Entwicklungsmechanik der Organismen, 1964
- Gastrulation in the housefly,Musca vicina, macquartCellular and Molecular Life Sciences, 1959
- A cinematographic study of the embryology ofDrosophila melanogasterWilhelm Roux' Archiv für Entwicklungsmechanik der Organismen, 1956
- STUDIES ON THE FINE STRUCTURE OF THE MAMMALIAN TESTISThe Journal of cell biology, 1955