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The form and function of the oesophageal region of the insect parasite Tetradonema plicans (Nematoda: Tetradonematidae)

Published online by Cambridge University Press:  06 April 2009

K. Elaine Hudson
K. Elaine Hudson
Affiliation:
Department of Zoology and Applied Entomology, Imperial College of Science and Technology, South Kensington, London, S. W. 7
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Extract

The tetrad and companion cells, in association with the oesophagus and dorsal tract of tissue, of Tetradonema plicans, have been investigated in the host Bradysia paupera. The companion cells contain glycogen and mucopolysaccharide. The tetrad cells are rich in RNA and probably synthesize protein and secrete some as enzymes. The gut is functional and the oesophagus is in connexion with the tetrad. The dorsal tract is not connected with the oesophagus or tetrad and contains lipid with characteristics similar to that found in the eggs.

It is suggested that the tetrad and companion cells are homologous with the stichocytes present in the Trichuroidea and some members of the Mermithoidea.

I am grateful to Professor T. R. E. Southwood in whose department this work was carried out. I should like to thank Dr N. A. Croll for supervising and encouraging this work and Dr T. Jenkins for his helpful criticism and advice. The work was supported by the Agricultural Research Council.

Type
Research Article
Information
Parasitology , Volume 63 , Issue 1 , August 1971 , pp. 137 - 143
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Bruce, R. G. (1970). Structure of the oesophagus of the infective juvenile and adult Trichinella spiralis. Journal of Parasitology, 56, 540–9.CrossRefGoogle ScholarPubMed
Chidwood, B. G. & Chitwood, M. B. (1937). The histology of nemic oesophagi. VIII. The oesophagus of representatives of the Enoplida. Journal of the Washington Academy of Sciences 27, 517–31.Google Scholar
Chitwood, B. G. & Chitwood, M. B. (1950). An Introduction to Nematology. Baltimore: Monumental Printing Co.Google Scholar
Cobb, N. A. (1919). Tetradonema plicans nov.gen. et spec., representing a new family, Tetradonematidae as now found parasitic in larvae of the midge-insect Sciara coprophila Lintner. Journal of Parasitology 4, 176–85.CrossRefGoogle Scholar
Ferris, J. M. & Ferris, V. R. (1966). Observations on Tetradonema plicans an entomoparasitic nematode, with a key to the genera of the family Tetradonematidae (Nematoda: Trichosyringida). Annals of the Entomological Society of America 59, 964–71.CrossRefGoogle Scholar
Goodey, J. B. (1963). Laboratory Methods for Work with Plant and Soil Nematodes. Ministry of Agriculture Fisheries and Food, Technical Bulletin No. 2.Google Scholar
Hungerford, H. B. (1919). Biological notes on Tetradonema plicans Cobb, a nematode parasite of Sciara coprophila Lintner. Journal of Parasitology 5, 186–93.CrossRefGoogle Scholar
Jenkins, T. (1966). Histochemical studies on the oesophageal region of the pig whipworm, Trichuris suis. Proceedings of the First International Congress of Parasitology, Rome, 1964. Vol. 2, pp. 845–6.Google Scholar
Pearse, A. G. E. (1968). Histochemistry Theoretical and Applied, 1. London: J. and A. Churchill Ltd.Google Scholar
Reynolds, E. S. (1963). The use of lead citrate at high pH as an electron opaque stain in electron microscopy. Journal of Cell Biology 17, 208–12.CrossRefGoogle ScholarPubMed