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  • 1975-1979  (2)
  • 1970-1974  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Nematocyte migration in Hydra influenced by tissue polarity (1974)
    [s.l.] : Nature Publishing Group
    Nature 248 (1974), S. 387-390 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] In Hydra, migration of the desmoneme nematocytes takes place only in the direction of tissue polarity as defined by which end will regenerate a ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/248387a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Oriented migration of interstitial cells and nematocytes inHydra attenuata (1974)
    Springer
    Development genes and evolution 176 (1974), S. 67-88 
    Details
    ISSN: 1432-041X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The migratory properties of hydra cells within the tissue were studied. The extent and direction of cell migration were examined in budding, non-budding, and regenerating animals. Nematocytes and a small number of single big interstitial cells (the multipotent interstitial cells) actively migrate preferentially in an apical direction. Basal migration of these cells occurs only when a bud is present and, in which case, the cells migrate into the developing bud. The regeneration of the hypostome and tentacles does not affect cell migration in either direction, except for apical migration of stenotele nematocytes, which was markedly reduced.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00577831
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  • 3
    Digitale Medien
    Digitale Medien
    Regulation of interstitial cell differentiation inHydra attenuata (1977)
    Springer
    Development genes and evolution 181 (1977), S. 203-213 
    Details
    ISSN: 1432-041X
    Schlagwort(e): Interstitial cell ; Position-dependent differentiation ; Hydra ; Nematocyte
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The axial position of interstitial-cell (i-cell) differentiation into nematocytes inHydra was studied. Nests of developing nematoblasts of three types of nematocytes were distributed in a non-uniform manner along the body column. Stenotele nematoblasts were distributed in a gradient with a maximum in the peduncle. Desmoneme and atrichous isorhiza nematoblasts were found predominantly in the upper half of the body region. These results suggest that the type of nematocyte differentiation an i-cell undergoes is influenced by the axial position of the i-cell. Because the assayed stage of nematocyte differentiation occurred 6–7 days after beginning of differentiation, the axial position of the anticedent i-cell at the time of commitment was determined by correcting for tissue displacement.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00848421
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  • 4
    Digitale Medien
    Digitale Medien
    Morphogenetic substances in nerve-depletedhydra (1979)
    Springer
    Development genes and evolution 187 (1979), S. 323-328 
    Details
    ISSN: 1432-041X
    Schlagwort(e): Nerve-depletedhydra ; Morphogenetic substances
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary By a double colchicine treatment the nerve-cell population ofhydra was reduced to less than 1% of the normal complement. Such severely nerve-depletedhydra contained normal or higher than normal concentrations of head activator, head inhibitor, foot activator and foot inhibitor which in normal animals are produced by nerve cells. According to typical chromatographic properties all four morphogenetic substances were chemically identical to those found in normal animals. It is suggested that in nervedepletedhydra the epithelial cells, as the only remaining cell type, have taken over the morphogen-producing function of nerve cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00848467
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