Spangenberg DB, Lattanzio F, Philput C, Schwarte R, Lowe B, Philput J.
ASGSB Bull. 1995 Oct; 9: 88.
Dept. of Pathology, Eastern Virginia Medical School, Norfolk 23501, USA.
Aurelia polyps and ephyrae were flown on two shuttle missions, IML-2 and SLS-1. During the SLS-1 mission, polyps were induced to strobilate @ 28 degrees C using iodine or thyroxine. Ephyrae were retrieved three hours after shuttle touch-down following nine days in microg. The IML-2 experiment was flown for 14 days @ 22 degrees C after the polyps were induced to strobilate with iodine 24h pre-flight. Two groups were centrifuged @ 1-g in space for most of the flight duration. The organisms in microg and controls were videotaped on four different days. One group of 6 polyps with immature buds were also flown and compared with ground controls post-flight regarding numbers of buds and their tentacle numbers. The IML-2 experiment was recovered after 5.5h post-flight. Ephyrae from both experiments were subjected to the Aurelia Metamorphosis Test System post-flight wherein the number of ephyrae and their structures (arms, rhopalia, statoliths per rhopalia) were counted as were the number of pulses per minute. Swimming ability was also noted. During both flight experiments, polyps gave rise to ephyrae in space which were able to pulse and swim. More ephyrae with abnormal arm numbers were found in the space-developed groups than controls. In addition, fewer space-developed (microg) ephyrae swam post-flight than 1g controls. Although statolith numbers were not significantly different from controls in ephyrae from polyps induced to strobilate 24h pre-flight in both experiments, statoliths were found in ephyrae in low sulfate sea water in higher numbers in space-maintained ephyrae than in controls.
Publication Types:
Keywords:
- Animals
- Cell Physiology
- Human Development
- Metamorphosis, Biological
- Scyphozoa
- Thyroxine
- Weightlessness
- NASA Discipline Developmental Biology
- NASA Discipline Number 00-00
- NASA Program Flight
- Non-NASA Center
Other ID:
UI: 102222728
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