COMPARATIVE STUDY
JOURNAL ARTICLE

Pasteuria thornei sp. nov. and Pasteuria penetrans sensu stricto emend., mycelial and endospore-forming bacteria parasitic, respectively, on plant-parasitic nematodes of the genera Pratylenchus and Meloidogyne

M P Starr, R M Sayre
Annales de L'Institut Pasteur. Microbiology 1988, 139 (1): 11-31
3382544
Descriptions are presented of two members of the Pasteuria penetrans group of mycelial and endospore-forming bacteria, parasitic on plant-parasitic nematodes. In one case, the epithet P. penetrans sensu stricto emend. has now been limited to members of this group with cup-shaped sporangia and ellipsoidal endospores, parasitic primarily on the root-knot nematode Meloidogyne incognita. The second organism, with rhomboidal sporangia and nearly spherical endospores, which is parasitic primarily on the root-lesion nematode Pratylenchus brachyurus, is assigned to P. thornei sp. nov. An updated and emended description is offered of the genus Pasteuria Metchnikoff 1888 emend. The relationships are analysed among these two nematode parasites and the type species of this genus, P. ramosa Metchnikoff 1888, a parasite of cladoceran invertebrates. Because none of these microbes has been publicly reported to have been cultivated axenically, these relationships are based mainly on morphological, developmental, and pathological criteria.

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