Stolon vs. Hydranth Determination in Pennaria Tiarella Planulae: A Role for DNA Synthesis
Larvae of the gymnoblastic hydroid Pennaria tiarella develop and metamorphose in a synchronous and predictable manner. They progress from ovoid pre-planulae 12 hours after fertilization to definitive, filiform planulae by 24 hours of development. Planulae are free living for a defined period of time (approximately 5 days at 21°C) and then metamorphose with the anterior regions of larvae becoming stolons, the posterior regions forming hydranths. The uniformity of this developmental pattern allows the utilization of Pennaria as an experimental system to investigate the principal morphogenetic determination occurring in hydroid larvae, that of stolon versus hydranth.
KeywordsLarval Development Developmental Potential Cell Cycle Kinetic Constant Specific Activity Hydrid Regeneration
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