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Regeneration in Corallimorpharia

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Title: Regeneration in Corallimorpharia
Author: Vroom, Paige
Department: Department of Pathobiology
Program: Pathobiology
Advisor: Lumsden, John S
Abstract: Regeneration in Corallimopharia was investigated to determine mechanisms and environmental influences. Rhodactis sp. normal histology and regeneration following bisection over 14 days was described. Contraction of the wound occurred after 24 h and wound closure was complete as early as 4 to 8 d after fragmentation. Extension of undifferentiated tissue from the epidermis and fusion to the actinopharynx epithelium occurred, followed by differentiation of tissue layers. Structural reorganization then occurred to result in a continuous surface body wall and a cylindrical internal actinopharynx. No significant differences in regeneration rate were seen among three different species of Corallimorpharia or polyp sizes. In Rhodactis sp. low light (30-60 µmol photons m−2 s−1) and starvation were positively associated with early regeneration. High light and feeding had a negative impact on regeneration and were accompanied by increased numbers of zooxanthellae in tissues. These findings provide the framework for future work in regeneration of corallimorpharians.
URI: http://hdl.handle.net/10214/10025
Date: 2016-09
Rights: Attribution-NonCommercial-NoDerivs 2.5 Canada
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Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada