Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-30T23:50:54.672Z Has data issue: false hasContentIssue false
  • English
  • Français

Oogenesis and fertilization in Dipetalonema viteae (Nematoda: Filarioidea)

Published online by Cambridge University Press:  06 April 2009

Diane J. McLaren
Diane J. McLaren
Affiliation:
Division of Parasitology, National Institute for Medical Research, London NW7 1AA
Get access Rights & Permissions [Opens in a new window]

Extract

Oogenesis and fertilization in the filarial worm Dipetalonema viteae have been described. The female gametes are developed from a syncytium situated at the posterior tip of the ovary. The syncytium grows along the length of the ovary as an anucleate rachis carrying the germ cells with it. In the germinal region of the ovary the rachis is a central axial structure, but in the growth region it becomes very branched. The female gametes retain their attachment with the rachis until they have become mature primary oocytes; they acquire a surface coat whilst in the growth zone of the ovary. At fertilization the successful spermatozoon produces numerous ribosomes. Residual spermatozoa are apparently destroyed by the oocyte. The fertilized oocyte divides meiotically to yield an ovum and two polar bodies. In species destined to be unsheathed in the blood the surface coat and the original oolemma separate from the surface of the ovum. A new oolemma is produced, presumably under the stimulus of fertilization.

Type
Research Article
Information
Parasitology , Volume 66 , Issue 3 , June 1973 , pp. 465 - 472
Copyright
Copyright © Cambridge University Press 1973

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Beams, H. W., & Sekhon, S. S., (1972). Cytodifferentiation during spenniogenesis in Rhabditis pellio. Journal of infrastructure Research 38, 511–27.Google ScholarPubMed
Favard, P., (1961). Évolution des ultrastruetures cellulaires au cours de la spennatogénese de l'Ascaris. Annales des sciences naturelles. Zoologie 12, 53–152.Google Scholar
Foor, W. E., (1967). Ultrastructural aspects of oocyte development and shell formation in Ascaris lumbricoides. The Journal of Parasitology 53, 1245–61.CrossRefGoogle ScholarPubMed
Foor, W. E., (1968). Zygote formation in Ascaris lumbricoides. The Journal of Cell Biology 39, 119–34.CrossRefGoogle ScholarPubMed
Foor, W. E., (1970). Spermatozoon morphology and zygote formation in Nematodes. Biology of Reproduction (suppl. 2) 177–202.CrossRefGoogle ScholarPubMed
Harada, R., Mabda, T., Nakashima, A., Sadakata, Y., Ando, M., Yonamike, K., Otsuji, Y., & Sato, H., (1970). Eleetronmicroscopieal studies on the mechanism of oogenesis and fertilization in Dirofilaria immitis. In Recent Advances in Researches on Filariasis and Schistosomiasis in Japan, (ed. Sasa, M.), pp. 99–121. University of Tokyo Press and University Park Press.Google Scholar
Kaulenas, M. S., & Fairbairn, D., (1968). RNA metabolism of fertilized Ascaris lumbricoides eggs during uterine development. Experimental Cell Research 52, 233–51.CrossRefGoogle ScholarPubMed
Lee, D. L., (1971). The structure and development of the spermatozoon of Heterakis gallinarum (Nematoda). Journal of Zoology 164, 181–7.CrossRefGoogle Scholar
Lee, D. L., & Lešťan, P., (1971). Oogenesis and egg shell formation in Heterakis gallinarum (Nematoda). Journal of Zoology 164, 189–96.CrossRefGoogle Scholar
McFadzean, J. A., & Smiles, J., (1956). Studies on Litomosoides carinii by phase contrast microscopy: The development of the larvae. Journal of Helminthology 30, 25–32.CrossRefGoogle ScholarPubMed
McLaren, D. J., (1973). The structure and development of the spermatozoon of Dipetalonema viteae (Nematoda: Pilarioidea). Parasitology 66, 447–63.CrossRefGoogle Scholar
Prestage, J. J., (1960). The fine structure of the growth region of the ovary in Ascaris lumbricoides var. suum with special reference to the rachis. The Journal of Parasitology 46, 69–78.CrossRefGoogle Scholar
Rogers, R. A., (1956). A study of eggs of Ascaris lumbricoides var. suum with the electron microscope. The Journal of Parasitology 42, 97–108.CrossRefGoogle ScholarPubMed
Schneider, A., (1883). Das Ei und seine Befruchtung. Breslau: J. U. Kern.CrossRefGoogle Scholar
Taylor, A. E. R., (1960). The spermatogenesis and embryology of Litomosoides carinii and Dirofilaria immitis. Journal of Helminthology 34, 3–12.CrossRefGoogle ScholarPubMed
Terry, A., Terry, R. J., & Worms, M. J., (1961). Dipetalonema witei, filarial parasite of the jird Meriones libycus. II. The reproductive system, gametogenesis and development of the microfilaria. The Journal of Parasitology 47, 703–11.CrossRefGoogle ScholarPubMed