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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #84083
Title: LIFE CYCLE AND HOST SPECIFICITY OF PASTEURIA SP. PARASITIZING HETERODERA GLYCINES

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

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 12/1/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The life-cycle of an undescribed Pasteuria sp., first reported in 1994 as a parasite of Heterodera glycines in North America, was investigated by examining H. glycines adults and cysts extracted from naturally infested soil, and juvenile stages excised from roots of soybean grown in this soil. Germ tubes originating from Pasteuria endospores penetrated into the body of late second-stage juveniles (J2). Mycelial microcolonies formed in J2, then fragmented and proliferated throughout the body cavity of third-stage juveniles (J3). Sporulation began in J3 with the formation of grape-like clusters of sporangia and continued in fourth-stage female juveniles, adult females, and cysts, which became filled with various developmental stages of Pasteuria, including octets, quartets, triples, doublets, and mature endospores. The number of endospores per cyst ranged from 30,000 to 820,000 (x=313,500 +/233,700). Endospores from race 4 of H. glycines attached to J2 of H. glycines races 1, 2, 3, 5, and 14, and to J2 of H. schachtii, H. trifolii, and H. lespedezae. Meloidogyne arenaria race 1, Tylenchorhynchus nudus, and Laboronema sp. were not hosts for this isolate of Pasteuria sp.