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ARS Home » Research » Publications at this Location » Publication #68486
Title: ULTRASTRUCTURE OF PRATYLENCHUS PENETRANS

Author
item ZUNKE, ULRICH - UNIV. OF HAMBURG, GERMANY
item ENDO, BURTON - COLLABORATOR-USDA-ARS
item WERGIN, WILLIAM

Submitted to: Nematropica
Publication Type: Abstract Only
Publication Acceptance Date: 4/10/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Observations were made on the ultrastructural anatomy of various developmental stages of Pratylenchus penetrans using transmission (TEM) and low temperature scanning electron microscopy (LTSEM) with emphasis on the esophagus, intestine, and reproductive system. The two subventral glands are delineated by cell membranes. At the base of the metacorpus, the lumen of the esophagus branches and terminates in quadriradiate valves in each of the subventral gland ampullae. The secretory granules are small and have moderate electron opacity. In comparison, secretory granules in the dorsal gland extension in the metacorpus may appear uniformly small but show a wide range in size and electron opaqueness within the procorpus. Sphincter muscles occur at each end of the metacorpus. Spermatogonial cells in the germinal zone of the testis develop into amoeboid spermatids with concentrations of chromatin. The vaginal cuticle forms a flat contoured channel which is convoluted near the vulva and is continuous with the body cuticle. Two pairs of muscles with longitudinal-tangential orientations are attached to the cuticular wall of the vulva. Comparisons were made on observation of isolated nematodes and those made on nematodes within plant host cells using video-enhanced light microscopy (VECM).