ULTRASTRUCTURE OF ZYMOGEN CELLS IN HYDRA VIRIDIS

被引:14
作者
HAYNES, JF
DAVIS, LE
机构
[1] Department of Biology, University of Notre Dame, Notre Dame, 46556, Indiana
[2] Department of Zoology, University of Maine, Orono, 04473, Maine
[3] Department of Zoology, Syracuse University, Syracuse, New York
来源
ZEITSCHRIFT FUR ZELLFORSCHUNG UND MIKROSKOPISCHE ANATOMIE | 1969年 / 100卷 / 02期
关键词
D O I
10.1007/BF00343886
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
The zymogenic secretory cells of Hydra viridis are scattered between the digestive muscle cells of the gastric region. The mature zymogenic cells are located along the apical surface of the gastrodermal epithelium and contain numerous spherical secretory droplets. They appear to differentiate from stem cells located near the mesoglea. These stem cells resemble epidermal interstitial cells and are filled with free ribosomes. They differ from the interstitial cell in that they usually possess a small amount of granular endoplasmic reticulum. During the process of differentiation they elaborate a highly organized system of granular endoplasmic reticulum. This system becomes dispersed into vesicles as the secretory product is synthesized. There is no indication that the Golgi apparatus participates directly in the formation of the secretory droplets, and there is no indication of a membrane bounding the mature secretory droplet. The fate of the zymogenic cell following the discharge of its secretory product was not determined. It is possible that these cells revert back to a stage resembling the stem cell before resynthesizing a new supply of secretion. In this case the normal secretory process would be very similar to the events described in the dedifferentiation of the zymogenic cells during regeneration. © 1969 Springer-Verlag.
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页码:316 / &
相关论文
共 18 条
[11]   FINE STRUCTURE OF DIFFERENTIATING INTERSTITIAL CELLS IN HYDRA [J].
LENTZ, TL .
ZEITSCHRIFT FUR ZELLFORSCHUNG UND MIKROSKOPISCHE ANATOMIE, 1965, 67 (04) :547-+
[12]   GROWTH AND SEXUAL DIFFERENTIATION OF HYDRA IN MASS CULTURE [J].
LOOMIS, WF ;
LENHOFF, HM .
JOURNAL OF EXPERIMENTAL ZOOLOGY, 1956, 132 (03) :555-568
[13]   USE OF LEAD CITRATE AT HIGH PH AS AN ELECTRON-OPAQUE STAIN IN ELECTRON MICROSCOPY [J].
REYNOLDS, ES .
JOURNAL OF CELL BIOLOGY, 1963, 17 (01) :208-&
[14]  
ROSE P G, 1968, Wilhelm Roux' Archiv fuer Entwicklungsmechanik der Organismen, V161, P281, DOI 10.1007/BF00576681
[15]  
ROSE P G, 1968, Wilhelm Roux' Archiv fuer Entwicklungsmechanik der Organismen, V161, P298, DOI 10.1007/BF00576682
[16]   THE DEVELOPMENT OF THE CNIDOBLASTS OF HYDRA - AN ELECTRON MICROSCOPE STUDY OF CELL DIFFERENTIATION [J].
SLAUTTERBACK, DB ;
FAWCETT, DW .
JOURNAL OF BIOPHYSICAL AND BIOCHEMICAL CYTOLOGY, 1959, 5 (03) :441-&
[17]  
VANGANSEN PS, 1954, ANN SOC ROY ZOOL BEL, V85, P187
[18]   STAINING OF TISSUE SECTIONS FOR ELECTRON MICROSCOPY WITH HEAVY METALS [J].
WATSON, ML .
JOURNAL OF BIOPHYSICAL AND BIOCHEMICAL CYTOLOGY, 1958, 4 (04) :475-&