- Published:
An ultrastructural study of oogenesis in the polychaeteNephtys hombergi Savigny
Helgoländer Meeresuntersuchungen volume 43, pages 157–169 (1989)
Abstract
The polychaeteNephtys hombergi has an annual cycle of reproduction. Ovaries were fixed for electron microscopy during the gametogenic phase from September to March, and during the breeding and post-breeding periol. Oogenesis takes place entirely within the ovary, the integrity of which is maintained by a network of simple follicle cells. Previtellogenic oocytes have close contacts with the peri-vasal cells which surround the genital blood capillaries. These contacts are lost as the oocytes enter vitellogenesis. The vitellogenic oocytes have a cytology typical of oocytes which are thought to undergo autosynthetic production of protein yolk. Biochemical studies would be required to establish whether heterosynthesis of yolk also occurs. As the oocytes proceed through vitellogenesis, cortical material is laid down near the periphery of the oocyte and a microvillous surface is developed. When the microvillous surface is complete the oocytes, by then hormone independent, are ovulated from the ovary and are ready to be spawned.
Literature cited
Baert, J.-L., 1985. Multiple forms of vitellin in young oocytes ofPerinereis cultrifera (polychaete annelid): occurrence and relation to vitellin maturation in the oocyte. — Comp. Biochem. Physiol.81B, 851–856.
Baert, J.-L., 1986a. Evidence for vitellin maturation within the oocytes ofPerinereis cultrifera (polychaete annelid). — Comp. Biochem. Physiol.83B, 827–853.
Baert, J.-L., 1986b. Vitellin and vitellogenesis in the polychaetePerinereis cultrifera. In: Advances in invertebrate reproduction. Ed. by M. Porchet, J.-C. Andries & A. Dhainau, Elsevier, Amsterdam.4, 207–214.
Bentley, M. G., 1982. Gonadotrophic hormone in the PolychaetesNephtys hombergi andN. caeca: an in vitro approach. — Gen. comp. Endocrinol.46, 369.
Bentley, M. G. & Olive, P. J. W., 1982. An in vitro assay for gonadotrophic hormone in the polychaeteNephtys hombergii Sav. (Nephtyidae). — Gen. comp. Endocrinol.47, 467–484.
Bentley, M. G., Olive, P. J. W., Garwood, P. R. & Wright, N. H., (1984) The spawning and spawning mechanism ofNephtys caeca (Fabricius, 1780) andNephtys hombergi Savigny, 1818 (Annelida: Polychaeta). — Sarsia69, 63–68.
Dhainaut, A., 1967. Étude de la vitellogenèse chezNereis diversicolor O. F. Müller (Annélide: Polychète), par autoradiographie à haute résolution. — C. r. hebd. Séanc. Acad. Sci. Paris165, 434–436.
Dhainaut, A., 1969a. Étude ultrastructurale et cytochimique de la formation des inclusions intranucleaires dans les ovocytes de l’annélideNereis diversicolor (O. F. Müller). — Z. Zellforsch. mikrosk. Anat.96, 75–86.
Dhainaut, A., 1969b. Origine et structure des formations mucopolysaccharidiques de la zone corticale de l’ovocyte deNereis diversicolor (O. F. Müller) (Annélide, Polychète). — J. Microsc8, 69–86.
Dhainaut, A., 1970, Étude cytochimique et ultrastructurale de l’évolution ovocytaire deNereis pelagica. I: Ovogenèse naturelle. — Z. Zellforsch. mikrosk. Anat.104, 375–389.
Dhainaut, A., 1984. Oogenesis in polychaetes. Ultrastructural differentiation and metabolism of nereid oocytes. — Fortschr. Zool.29, 183–205.
Dhainaut, A. & Porchet, M., 1977a. Évolution des constituants glucidiques de l’ovocyte dePerinereis cultrifera (Annélide: Polychète) dans les conditions naturelles. II. Étude autoradiographique des ovocytes jeunes. — Biol. cell.28, 233–240.
Dhainaut, A. & Porchet, M., 1977b. Évolution des constituants glucidiques de l’ovocyte dePerinereis cultrifera (Annélide: Polychète) dans les conditions naturelles. III. Étude autoradiographique des ovocytes submatures. — Biol. cell.28, 241–250.
Eckelbarger, K. J., 1979. Ultrastructural evidence for both autosynthetic and heterosynthetic yolk formation in the oocytes of an annelid (Phragmatopoma lapidosa: Polychaeta). — Tissue Cell11, 425–443.
Eckelbarger, K. J., 1980. An ultrastructural study of oogenesis inStreblospio benedicti (Spionidae), with remarks on the diversity of vitellogenic mechanisms in Polychaeta. — Zoomorphology94, 241–263.
Eckelbarger, K. J., 1984. Comparative aspects of oogenesis in polychaetes. — Fortschr. Zool.29, 123–148.
Fischer, A., 1975. The structure of symplasmic early oocytes and their enveloping sheath cells in the polychaete,Platynereis dumerilii. — Cell Tiss. Res.160, 327–343.
Fischer, A., 1979. A vitellin-like antigen in the coelomic fluid of maturingNereis virens females. —Naturwissenschaften66, 316–317.
Fischer, A. & Dhainaut, A., 1985. The origin of yolk in the oocytes ofNereis virens (Annelida: Polychaeta): Electron-microscopic and autoradiographic studies by use of unspecific and yolkspecific markers. — Cell Tiss. Res.240, 67–76.
Fischer, A. & Schmitz, K., 1981. Preparation, properties and composition ofNereis vitellin, the yolk protein of the annelidNereis virens. — Differentiation9, 103–108.
Fischer, A., Buscher, L., Frangenberg, H.-R. & Klenke, T. G., 1984. In vitro studies on the origin of yolk protein and its uptake by oocytes in the annelid,Nereis virens (Polychaeta). — Verh. dt. zool. Ges.77, 145.
Garwood, P. R., 1981. Observations on the cytology of the developing female germ cell in the polychaeteHarmothoe imbricata (L.). — Int. J. Invert. Repord.3, 333–345.
Millonig, G. J., 1961. Advantages of a phosphate buffer for OsO4 solutions in fixation. — J. appl. Phys.32, 1637.
Olive, P. J. W., 1978. Reproduction and annual gametogenic cycle inNephtys hombergii andN. caeca (Polychaeta: Nephtyidae). — Mar. Biol.46, 83–90.
Olive, P. J. W., 1983. Annelida-Polychaeta. In: Reproductive biology of invertebrates. Ed. by K. G. & R. G. Adiyodi, Wiley, London,1, 357–421.
Olive, P. J. W. & Bentley, M. G., 1980. Hormonal control of oogenesis, ovulation and spawning in the annual reproductive cycle of the polychaeteNephtys hombergi. — Int. J. Invert. Reprod.2, 205–221.
Olive, P. J. W., Bentley, M. G., Wright, N. H. & Morgan, P. J., 1985. Reproductive energetics, endocrinology and population dynamics ofNephtys caeca andNephtys hombergi. — Mar. Biol.88, 235–246.
Olive, P. J. W., Garwood, P. R. & Bentley, M. G., 1981a. Oosorption and reproductive failure in Polychaeta in relation to their reproductive strategy. — Bull. Soc. zool. Fr.106, 263–268.
Olive, P. J. W., Garwood, P. R., Bentley, M. G. & Wright, N. H., 1981b. Reproductive success, relative abundance and population structure of two species ofNephtys in an estuarine beach. — Mar. Biol.63, 189–196.
Olive, P. J. W. & Pillai, G., 1983. Reproductive biology of the polychaeteKefersteinia cirrata Keferstein (Hesionidae). I. Ovary structure and oogenesis. — Int. J. Invert. Reprod.6, 295–306.
Rashan, L. J. & Howie, D. I. D., 1982. Vitellogenesis in the lugwormArenicola marina L. I. Cytological and ultrastructural observations. — Int. J. Invert. Reprod.5, 221–231.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bentley, M.G. An ultrastructural study of oogenesis in the polychaeteNephtys hombergi Savigny. Helgolander Meeresunters 43, 157–169 (1989). https://doi.org/10.1007/BF02367896
Issue Date:
DOI: https://doi.org/10.1007/BF02367896