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American Zoologist 1977 17(3):661-670; doi:10.1093/icb/17.3.661
© 1977 by The Society for Integrative and Comparative Biology
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In Vitro Development of Drosophila Imaginal Discs: Hormonal Control and Mechanism of Evagination

PAUL MANDARON, CHRISTIANE GLILLERMET and PHILIPPE SENGEL
Laboratoire de Zoologie et Biologie Animate, Universite Scientifique et Medicate de Grenoble France

A new approach in the understanding of the role of the two molting hormones, {alpha}-ecdysone and ß-ecdysone, in disc development is described. A new culture medium has been developed which allows discs, with either hormone, to undergo all steps of metamorphosis.

Time-lapse cinematographic and scanning electron microscopic analysis of the mechanism of evagination led to the conclusion that cells probably do not move extensively with respect to one another. In contrast, changes in cell shape appear to play a major role in this process.


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