Abstract

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, 224 pp.

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, USDA–ARS, 10300 Baltimore Avenue, Building 011A, Room 165B, Beltsville, MD 20705–2350.

Copies of this publication may be purchased from the National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161; phone (703) 605–6000.

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Issued December 1998

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Original posting: November 1999