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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #90732
Title: ELECTRON MICROSCOPICAL OBSERVATIONS ON PASTEURIA SP. PARASITIZING HETERODERA GLYCINES

Author
item ATIBALENTJA, N - UNIV OF ILLINOIS
item Noel, Gregory
item JACKSTYS, BIRUTE - UNIV OF ILLINOIS

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: 6/20/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The ultrastructure of an undescribed species of Pasteuria, first reported in 1994 as a parasite of Heterodera glycines in North America, was investigated by examining thin sections prepared from pasteuria-infected cysts extracted from the rhizosphere of H. glycines-susceptible soybean 'Williams 82' grown in the greenhouse in naturally infested soil. The stages of endosporogenesis were typical of Pasteuria spp. The mature endospore was similar to that of P. nishizawae, with an epicortical layer surrounding the cortex, an outer spore coat tapering from 0.2 um thick at the spore equator to 0.1 um or less at the base of the central body, and a partial hirsute layer originating from the adhesion layer of the central body. However, the endospores of this Pasteuria were larger than those of P. nishizawae. The central body, initially spherical (1.6 x 1.7) before the formation of the parasporal fibers, was elliptical in the mature endospore, and measured 1.9 x 1.5 compared to 1.6 x 1.3 for P. nishizawae.