Metamorphosis of Hydractinia echinata Insights into pattern formation in Hydroids
Wilhelm Roux's Archives of Developmental Biology, ISSN: 0340-0794, Vol: 193, Issue: 6, Page: 370-378
1984
- 30Citations
- 3Captures
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Metrics Details
- Citations30
- Citation Indexes30
- 30
- CrossRef28
- Captures3
- Readers3
Article Description
Hydractinia echinata is a marine, colony-forming coelenterate. Fertilized eggs develop into freely swimming planula larvae, which undergo metamorphosis to a sessile (primary) polyp. Metamorphosis can be triggered by means of certain marine bacteria and by Cs. Half a day after this treatment a larva will have developed into a polyp. The induction of metamorphosis can be prevented by addition of inhibitor I, a substance partially purified from tissue of Hydra. The larvae of H. echinata also appear to contain this substance. Inhibitor I applied after the onset of metamorphosis blocks its continuation as long as it remains in the culture medium. Cs applied within the same period of time also blocks the continuation of metamorphosis. However, these two agents have opposite effects on the body pattern of the resultant polyps. The experiments indicate that application of Cs triggers the generation of the pre-pattern. Inhibitor I appears to be a factor of this prepattern. A model is proposed which describes the basic features of head and foot/stolon formation not only for Hydractinia but also for other related hydroids. © 1984 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0005302744&origin=inward; http://dx.doi.org/10.1007/bf00848227; http://www.ncbi.nlm.nih.gov/pubmed/28305102; http://link.springer.com/10.1007/BF00848227; http://www.springerlink.com/index/10.1007/BF00848227; http://www.springerlink.com/index/pdf/10.1007/BF00848227; https://dx.doi.org/10.1007/bf00848227; https://link.springer.com/article/10.1007/BF00848227
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