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Capture and penetration processes of the free-living juveniles of Trichostrongylus colubriformis (Nematoda) by the nematophagous fungus, Arthrobotrys oligospora

Published online by Cambridge University Press:  06 April 2009

D. S. Murray  and
D. A. Wharton
D. S. Murray
Affiliation:
Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New Zealand
D. A. Wharton
Affiliation:
Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New Zealand
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Summary

The nematode-trapping fungus Arthrobotrys oligospora traps and invades all the free-living juvenile stages of the tri-chostrongyle nematode Trichostrongylus colubriformis. The processes of capture and invasion of the 1st-stage juveniles are described using differential interference contrast optics and 3-D reconstruction techniques. The adhesive responsible for capture is well preserved using a freeze-substitution technique for scanning electron microscopy. The invasion process of the ensheathed 3rd-stage juvenile of T. colubriformis takes much longer than in the 1st- or 2nd-stage juvenile and involves the formation of secondary infection pegs between the sheath and the cuticle which appear to penetrate the cuticle by physical pressure.

Keywords

Arthrobotrys oligosporaTrichostrongylus colubriformisnematophagous fungustrichostrongyle nematodebiological control3-D reconstructionscanning electron microscopy
Type
Research Article
Information
Parasitology , Volume 101 , Issue 1 , August 1990 , pp. 93 - 100
Copyright
Copyright © Cambridge University Press 1990

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