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Digestive cell and tentacle number in freshly detached buds of hydra viridis

International Journal of Invertebrate Reproduction 1(3): 167-178

Digestive cell and tentacle number in freshly detached buds of hydra viridis

Buds were collected from hydras fed 4 days a week on different schedules. Independent of schedule, parents produced the same number of buds/week, but significant differences appeared in the number of buds detaching on particular days and in the number of digestive cells present in the buds. Groups of buds collected from parents fed the same number of days (from 1-3) during the previous 4 days, contained statistically indistinguishable numbers of digestive cells despite the order or sequence of days on which feedings occurred. The number of digestive cells in all the freshly detached buds collected here can be accounted for by the growth of a bud primordium over a 4 day period of bud development and growth. Such a primordium would have about 3600 digestive cells and grow at the rate of 0.33 cells/cell per day of feeding. The numbers of tentacles found on freshly detached buds are correlated with the number of feeding days and digestive cells present in the bud. Tentacles may also form from primordia consisting originally of a specific number of cells.

Accession: 005161646

DOI: 10.1080/01651269.1979.10553311

Related references

Shostak, S.; Medic, D.; Jr.; Sproull, FA.; Jones, CC., 1978: Tentacle number in cultured Hydra viridis. Distributions of tentacle numbers on H. viridis under conditions which alter body sizes were determined in evaluating the controlling influences of environmental and intrinsic factors. Tentacle number is normally distributed and is a stable charac...

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Neckelmann, SN., 1982: Regulation of numbers of symbiotic algae in the digestive cell of Hydra viridis. Dissertation Abstracts International B Sciences and Engineering, 431: 24

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