Hostname: page-component-745bb68f8f-cphqk Total loading time: 0 Render date: 2025-01-14T02:47:11.504Z Has data issue: false hasContentIssue false
  • English
  • Français

The tylenchid (Nematoda) egg shell: formation of the egg shell in Meloidogyne javanica

Published online by Cambridge University Press:  06 April 2009

Michael A. McClure  and
A. F. Bird
Michael A. McClure
Affiliation:
Division of Horticultural Research, C.S.I.R.O., Box 350, G.P.O., Adelaide, South Australia5001
A. F. Bird
Affiliation:
Division of Horticultural Research, C.S.I.R.O., Box 350, G.P.O., Adelaide, South Australia5001
Get access Rights & Permissions [Opens in a new window]

Summary

Oogonia of Meloidogyne javanica are radially arranged around a central rachis to which they are attached by cytoplasmic bridges. As the oocytes mature the rachis disappears and the oocytes pass through the oviduct in tandem. The oviduct-spermatotheca valve is constructed of two rows of tightly packed cells of which there are four per row. The nuclei of these cells are large and contain balloon-shaped cytoplasmic invaginations. The spermatotheca is characterized by microtubules which extend to its lumen and by invaginations of plasmalemma. Cells of the distal uterine region contain large intracytoplasmic spaces bordered by endoplasmic reticulum whereas proximal uterine cells have dense cytoplasm and large areas of compact endoplasmic reticulum. Egg-shell formation begins in the spermatotheca with the modification of the oolemma to form the vitelline layer. The chitinous layer begins in the distal portion of the uterus and appears to originate from the egg. Proline-containing protein is incorporated into the chitinous and lipid layers as the egg passes through the mid-region of the uterus and formation of the lipid layer in this region completes egg development.

Type
Research Article
Information
Parasitology , Volume 72 , Issue 1 , February 1976 , pp. 29 - 39
Copyright
Copyright © Cambridge University Press 1976

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

Bird, A. F. (1968). Changes associated with parasitism in nematodes. III. Ultrastructure of the egg shell, larval cuticle, and contents of the subventral esophageal glands in Meloidogyne javanica, with some observations on hatching. Journal of Parasitology 54, 475–89.CrossRefGoogle Scholar
Bird, A. F. (1971). The Structure of Nematodes. New York, London: Academic Press.Google Scholar
Bird, A. F. & McClure, M. A. (1976). The tylenchid (Nematoda) egg shell: structure, composition and permeability. Parasitology 72, 19–28.CrossRefGoogle Scholar
Crompton, D. W. T. & Lee, D. L. (1965). The fine structure of the body wall of Polymorphus minutus (Goeze, 1782) (Acanthocephala). Parasitology 55, 357–64.CrossRefGoogle ScholarPubMed
Foor, W. E. (1967). Ultrastructural aspects of oocyte development in Ascaris lumbricoides. Journal of Parasitology 53, 1245–61.CrossRefGoogle ScholarPubMed
Geraert, E. (1972). A comparative study of the structure of female gonads in plant-parasitic tylenchida (Nematoda). Annales de la Soci 102 171–98.Google Scholar
Lee, D. L. & Lešťan, P. (1971). Oogenesis and egg shell formation in Heterakis gallinarum (Nematoda). Journal of Zoology, London 164, 189–96.CrossRefGoogle Scholar
McLaren, D. J. (1973). Oogenesis and fertilization in Dipetalonema viteae (Nematoda: Filaroidea). Parasitology 66, 465–72.CrossRefGoogle Scholar
Paweletz, M. (1967). Specimen preparation methods for electron microscope autoradiography. Siemens Review 34, 32–7.Google Scholar
Triantaphyllou, A. C. (1962). Oogenesis in the root-knot nematode Meloidogyne javanica. Nematologica 7, 105–13.CrossRefGoogle Scholar
Yuen, P. H. (1964). The female gonad in the subfamily Hoplolaiminae with a note on the spermatotheca of Tylenchorhynchus. Nematologica 10, 570–80.CrossRefGoogle Scholar
Yuen, P. H. (1971 a). Electron microscope studies on Aphelenchoides blastophthorus (Nematoda). I. The female genital tube. Nematologica 17, 1–12.CrossRefGoogle Scholar
Yuen, P. H. (1971 b). Electron microscope studies on Aphelenchoides blastophthorus (Nematoda). II. Oogenesis. Nematologica 17, 13–22.CrossRefGoogle Scholar