Endo, Burton Y. 1998. Atlas on Ultrastructure of Infective
Juveniles of the Soybean Cyst Nematode, Heterodera glycines.
U.S. Department of Agriculture, Agriculture Handbook No. 711,
This atlas illustrates the ultrastructure of juvenile stages
of the soybean cyst nematode, Heterodera glycines. It shows
the transition from preparasitic to parasitic juveniles and their
relation to host tissues, which become modified to form syncytia
as specialized feeding sites. The electron micrographs are grouped
into subunits to emphasize various features of the nematode and
host-parasite interactions. Subunits include the stomatal region,
the anterior neurosensory organs, esophagus and associated glands,
and the intestine. Illustrations also include changes in nematode
anatomy related to nematode development and early host responses.
Each unit contains a brief introduction, micrographs, and their
legends. This handbook is a comprehensive compilation of previously
published electron micrographs, combined with new data. The atlas
is an educational tool for those interested in nematode morphology
and a reference for researchers interested in applying physiological
studies to functional units of the nematode.
Keywords: Glycine max, Heterodera glycines, host-parasite
interaction, nematode, nematode anatomy, nematode cuticle, nematode
esophagus, nematode head region, nematode intestine, nematode
neurosensory system, nematode secretory granules, nematode stomatal
region, soybean, soybean cyst nematode, electron microscopy, ultrastructure.
While supplies last, single copies of this publication may
be obtained at no cost from Nematology
Laboratory, USDAARS, 10300 Baltimore Avenue, Building
011A, Room 165B, Beltsville, MD 207052350.
Copies of this publication may be purchased from the National
Technical Information Service, 5285 Port Royal Road, Springfield,
VA 22161; phone (703) 6056000.
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Issued December 1998
Original posting: November 1999