NDLI: Cell tracking supports secondary gastrulation in the moon jellyfish Aurelia

Content Provider	Springer Nature Link
Author	Gold, David A. Nakanishi, Nagayasu Hensley, Nicholai M. Hartenstein, Volker Jacobs, David K.
Copyright Year	2016
Abstract	The moon jellyfish Aurelia exhibits a dramatic reorganization of tissue during its metamorphosis from planula larva to polyp. There are currently two competing hypotheses regarding the fate of embryonic germ layers during this metamorphosis. In one scenario, the original endoderm undergoes apoptosis and is replaced by a secondary endoderm derived from ectodermal cells. In the second scenario, both ectoderm and endoderm remain intact through development. In this study, we performed a pulse-chase experiment to trace the fate of larval ectodermal cells. We observed that prior to metamorphosis, ectodermal cells that proliferated early in larval development concentrate at the future oral end of the polyp. During metamorphosis, these cells migrate into the endoderm, extending all the way to the aboral portion of the gut. We therefore reject the hypothesis that larval endoderm remains intact during metamorphosis and provide additional support for the “secondary gastrulation” hypothesis. Aurelia appears to offer the first and only described case where a cnidarian derives its endoderm twice during normal development, adding to a growing body of evidence that germ layers can be dramatically reorganized in cnidarian life cycles.
Starting Page	383
Ending Page	387
Page Count	5
File Format	PDF
ISSN	0949944X
Journal	Development Genes and Evolution
Volume Number	226
Issue Number	6
e-ISSN	1432041X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-08-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aurelia Gastrulation Cnidaria Moon jellyfish Developmental Biology Neurosciences Cell Biology Biochemistry Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Developmental Biology

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