Summary
Oogenesis was studied in adult Triturus vulgaris (Urodela) with the electron microscope. The oocytes investigated ranged between 50 μm and 1600 μm in diameter.
Two types of yolk platelet formation were found. Since both types involve the incorporation of high numbers of pinocytotic vesicles they are believed to be of an extraoocytic origin. On the basis of the order of their appearance they were named primary and secondary yolk.
Five different types of vesicles were found, which participate in a variety of activities, such as yolk formation and the formation of the Golgi apparatus. They originate from four different sources, namely the nuclear membrane, the cytoplasm in connection with ribosome-like particles, the Golgi apparatus and the plasma membrane through pinocytosis. The results obtained were discussed especially with respect to differences found between the anura and the urodela, such as the presence or absence of cortical granules or equivalent structures.
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References
Balinsky, B., Devis, R.: Origin and differentiation of cytoplasmic structures of the oocytes of Xenopus laevis. Acta Embryol. Morph. exp. (Palermo) 6, 55–108 (1963)
Clerot, J.C.: Mise en évidence par cytochimie ultrastructurale de l'emission de protéines par le noyau d'auxocytes de bactriciens. J. Microscopie 7, 973–992 (1968)
Dumont, J.N.: Oogenesis in Xenopus laevis (Daudin) I. Stages of oocyte development in laboratory maintained animals. J. Morph. 136, 153–180 (1972)
Godula, J.: Intramitochondrial complexes of atypical structures in hepatocytes of Triturus alpestris (Laurenti). Experientia (Basel) 28, 453–455 (1972)
Grant, P.: Phophatase metabolism during oogenesis in Rana temporaria. J. exp. Zool. 12, 513–544 (1953)
Hope, J., Humphries, A., Bourne, G.H.: Ultrastructural studies on developing oocytes of the salamander Triturus viridescens I. The relationship between follicle cells and developing oocytes. J. Ultrastruct. Res. 9, 302–324 (1963)
Hope, C., Humphries, A., Bourne, G.H.: Ultrastructural studies on developing oocytes in the salamander Triturus viridescens. II. The formation of yolk. J. Ultrastruct. Res. 10, 547–556 (1964a)
Hope, J., Humphries, A., Bourne, G.H.: Ultrastructural studies on developing oocytes of the salamander Triturus viridescens. III. Early cytoplasmic changes and the formation of pigment. J. Ultrastruct. Res. 10, 557–566 (1964b)
Karasaki, S.: Studies on amphibian yolk. I. The ultrastructure of the yolk platelet. J. Cell Biol. 18, 135–151 (1963)
Kemp, N.E.: Synthesis of yolk in oocytes of Rana pipiens after induced ovulation. J. Morph. 92, 487–505 (1953)
Kemp, N.E.: Cortical changes in growing oocytes and in fertilized or pricked eggs of Rana pipiens. J. Cell Biol. 34, 111–122 (1967)
Kessel, R.G.: Electron microscope studies on the origin of annulate lamellae in oocytes of Necturus. J. Cell Biol. 19, 391–414 (1963)
Kessel, R.G.: Cytodifferentiation in the Rana pipiens oocyte. I. Association between mitochondria and nucleolus-like bodies in young oocytes. J. Ultrastruct. Res. 28, 61–77 (1969)
Kessel, R.G.: Cytodifferentiation in the Rana pipiens oocyte. II. Intramitochondrial yolk. Z. Zellforsch. 112, 313–332 (1971a)
Kessel, R.G.: Origin of the Golgi apparatus in embryonic cells of the grasshopper. J. Ultrastruct. Res. 34, 260–275 (1971b)
Kress, A., Spornitz, U.M.: Ultrastructural studies of oogenesis in some European amphibians. I. Rana esculenta and Rana temporaria. Z. Zellforsch. 128, 438–456 (1972)
Lanzavecchia, G.: The formation of yolk in frog oocytes. Proc. European Conf. Electron Microscopy, Delft, 2, 746 (1960)
Lanzavecchia, G.: Structure and demolition of yolk in Rana esculenta. J. Ultrastruct. Res. 12, 147–159 (1965)
Massover, W.H.: Intramitochondrial yolk crystals of frog oocytes. I. Formation of yolk crystals by mitochondria during bullfrog oogenesis. J. Cell Biol. 48, 266–279 (1971a)
Massover, W.H.: Intramitochondrial yolk crystals of frog oocytes. II. Expulsion of intramitochondrial yolk crystals to form single-membrane bound hexagonal crystalloids. J. Ultrastruct. Res. 36, 603–620 (1971b)
Massover, W.H.: Nascent yolk platelets of anuran amphibian oocytes. J. Ultrastruct. Res. 37, 574–591 (1971c)
Reynolds, E.S.: The use of lead citrate at high pH as an electron opaque stain in electron microscopy. J. Cell Biol. 17, 208–213 (1963)
Ringle, D., Cross, P.R.: Organization and composition of the amphibian yolk platelet. I. Investigation on the organization of the platelet. Biol. Bull. 122, 263–280 (1962)
Sentein, P., Humeau, C.: Origine mitochondriale du vitellus dans l'ovocyte de Triturus helveticus. C. R. Acad. Sci. (Paris) Ser. D. 267, 753 (1968)
Spornitz, U.M.: Some properties of crystalline inclusion bodies in oocytes of Rana temporaria and Rana esculenta. Experientia (Basel) 28, 66–67 (1972)
Spornitz, U.M., Kress, A.: Yolk platelet formation in oocytes of Xenopus laevis (Daudin). Z. Zellforsch. 117, 235–251 (1971)
Takamoto, K.: Studies on the process of amphibian oogenesis. V. The formation of proteinaceous yolk in Rana ornativentris. Zool. Mag. 76, 259–264 (1967)
Wallace, R.A.: Studies on amphibian yolk. IV. An analysis of main body components of yolk platelets. Biochim. biophys. Acta (Amst.) 74, 505–518 (1963)
Wallace, R.A., Nichol, J.M., Ti Ho, Jared, D.W.: Studies on amphibian yolk. X. The relative roles of autosynthetic and heterosynthetic processes during yolk protein assembly by isolated oocytes. Develop. Biol. (in press)
Ward, R.T.: The origin of protein and fatty yolk in Rana pipiens. II. Electron microscopical and cytochemical observations of young and mature oocytes. J. Cell Biol. 14, 309–341 (1962)
Ward, R.T.: Dual mechanism for the formation of yolk platelets in Rana pipiens. J. Cell Biol. 23, 100A (1964)
Ward, R.T., Ward, E.: The multiplication of Golgi bodies in the oocytes of Rana pipiens. J. Microscopie 7, 1007–1020 (1968a)
Ward, R.T., Ward, E.: The origin and growth of cortical granules in the oocytes of Rana pipiens. J. Microscopie 7, 1021–1030 (1968b)
Wartenberg, H.: Elektronenmikroskopische und histochemische Studien über die Oogenese der Amphibieneizelle. Z. Zellforsch. 58, 427–486 (1962)
Wartenberg, H.: Experimentelle Untersuchungen über die Stoffaufnahme durch Pinocytose während der Vitellogenese der Amphibienoocyten. Z. Zellforsch. 63, 1004–1019 (1964)
Wischnitzer, S.: An electron microscopic study of the Golgi apparatus of amphibian oocytes. Z. Zellforsch. 57, 202–212 (1962)
Wischnitzer, S.: The ultrastructure of the layers enveloping yolk forming oocytes from Triturus viridescens. Z. Zellforsch. 60, 452–462 (1963)
Wischnitzer, S.: An electron microscopic study of the formation of the zona pellucida in oocytes from Triturus viridescens. Z. Zellforsch. 64, 196–209 (1964a)
Wischnitzer, S.: Ultrastructural changes in the cytoplasm of developing amphibian oocytes. J. Ultrastruct. Res. 10, 14–16 (1964b)
Wischnitzer, S.: The ultrastructure of the cytoplasm of the developing amphibian eggs. Advanc. Morphogenes. 5, 131–179 (1966)
Yew, M.L.: A cytological study of oogenesis and yolk formation in the Gulf Coast toad, Bufo valliceps. Cellule 67, 331–339 (1969)
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The authors wish to thank Prof. Dr. K.S. Ludwig for his valuable criticism and encouragement during the course of this study, Messrs. H. Boffin, C. Evers and Miss D. Lovrić for their capable technical assistance.
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Spornitz, U.M., Kress, A. Ultrastructural studies of oogenesis in some european amphibians. Z.Zellforsch 143, 387–407 (1973). https://doi.org/10.1007/BF00307423
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DOI: https://doi.org/10.1007/BF00307423