Histophysiology of growth in hydra

Burnett, Allison L.

doi:10.1002/jez.1401400207

Cited by 77 publications

(12 citation statements)

References 31 publications

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“…Most of the available evidence suggests these granules represent glycogen. First, the abundance of granules in the apical border of digestive cells corresponds to the region of hydra that contains the heaviest concentration of periodic acid-Schiff-positive material that is diastase sensitive (3,7). Glycogen has been shown to become depleted after about 2 wk of fasting (7), and in the present experiments no granules were found in animals starved for 3 wk.…”

Section: Discussionsupporting

confidence: 48%

INTRAMITOCHONDRIAL GLYCOGEN GRANULES IN DIGESTIVE CELLS OF HYDRA

Lentz

1966

The Journal of Cell Biology

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Section: Discussionsupporting

confidence: 48%

INTRAMITOCHONDRIAL GLYCOGEN GRANULES IN DIGESTIVE CELLS OF HYDRA

Lentz

1966

The Journal of Cell Biology

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“…Gland cells occur in hydra between the epithelial cells of the endoderm. At least two types of gland cells have been described: the enzyme-(zymogen) secreting type (secretory granules 2 4 ~) usually referred to us gland cell and the mucus-secreting type (secretory granules ~ 1 ~) usually referred to as mucous cell (Burnett, 1959). The former occurs principally in the gastric region; the latter occurs chiefly in the hypostome.…”

Section: Tissue Maceration and The Identi/ieation O/cell Typesmentioning

confidence: 99%

A quantitative method for maceration of hydra tissue

David

1973

W. Roux' Archiv f. Entwicklungsmechanik

425

232

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Summary. A method is described for the maceration (dissociation) of hydra tissue into single cells. The cells have characteristic morphology such that all basic types --epithelial, gland, mucous, inters~itiM, nematoblast, and nerve --can be distinguished. Criteria are given for identifying each ceil type by phase contrast microscopy. It is shown that maceration quantitatively recovers cells from hydra tissue.

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“…5 quently, maintaining similar amounts of host biomass in all three treatments. Burnett ( 1959Burnett ( , 1961 noted that hydras, after starvation for 5 days, have no remaining protein reserve material, and glycogen and lipid supplies have been extensively metabolized. A large proportion of the depletion occurred in the gastrodermal layer, which should have been unavailable for Kerona.…”

Section: Discussionmentioning

confidence: 99%

The Laboratory Population Ecology of Kerona Pediculus (O.F.M.) Epizoic on Hydra SPP.

Coleman¹

1966

Ecology

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In attempt to determine the factors regulating the distribution and abundance of Kerona pediculus, populations of the hypotrich and hydras were raised in the laboratory in artificial pond water. Factors governing the survival of hypotrichs on hydras were examined by varying the feeding conditions of hydras and the relative numbers available to Kerona. Ciliate populations did not maintain themselves on starved hydras. Availability of undetermined food substances from the hydras seems to limit the numbers of Kerona per hydra. The rate of increase of the hypotrichs varied inversely with density per hydra over a wide range. The densities ranged from below normal (3) to extremely crowded (96). Kerona densities increased in abnormal ways when hydras were infested with Hydramoeba hydroxena, or small histiophagic ciliates and flagellates. Only the amoebic infestation increased the absolute numbers of hypotrichs. Under certain culture conditions in the laboratory, the growth—rate of hydras was greater in the presence of Kerona than in its absence.

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Histophysiology of growth in hydra

Cited by 77 publications

References 31 publications

INTRAMITOCHONDRIAL GLYCOGEN GRANULES IN DIGESTIVE CELLS OF HYDRA

INTRAMITOCHONDRIAL GLYCOGEN GRANULES IN DIGESTIVE CELLS OF HYDRA

A quantitative method for maceration of hydra tissue

The Laboratory Population Ecology of Kerona Pediculus (O.F.M.) Epizoic on Hydra SPP.

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