Establishment of the new genus Paranosema based on the ultrastructure and molecular phylogeny of the type species Paranosema grylli Gen. Nov., Comb. Nov (Sokolova, Selezniov, Dolgikh, Issi 1994), from the cricket Gryllus bimaculatus Deg

Sokolova, Y.Y.; Dolgikh, V.V.; Morzhina, E.V.; Nassonova, E.S.; Issi, I.V.; Terry, R.S.; Ironside, J.E.; Smith, J.E.; Vossbrinck, C.R.

Авторы: Sokolova Y.Y., Dolgikh V.V., Morzhina E.V., Nassonova E.S., Issi I.V., Terry R.S., Ironside J.E., Smith J.E., Vossbrinck C.R.
Журнал: Journal of Invertebrate Pathology
Том: 84
Номер: 3
Год издания: 2003
Издательство: Academic Press
Местоположение издательства: United States
Первая страница: 159
Последняя страница: 172
DOI: 10.1016/j.jip.2003.10.004
Аннотация: The ultrastructure of the microsporidian parasite Nosema grylli, which parasitizes primarily fat body cells and haemocytes of the cricket Gryllus bimaculatus (Orthoptera, Gryllidae) is described. All observed stages (meront, meront/sporont transitional stage ("second meront"), sporont, sporoblast, and spore) are found in direct contact with the host cell cytoplasm. Nuclei are diplokaryotic during almost all stages of the life cycle, but a brief stage with one nucleus containing an abundance of electron-dense material is observed during a "second merogony." Sporogony is disporous. Mature spores are ovocylindrical in shape and measure 4.5+/-0.16micromx2.2+/-0.07 microm (n=10) on fresh smears and 3.3+/-0.06 micromx1.4+/-0.07 microm (n=10) on ultrathin sections. Spores contain 15-18 coils of an isofilar polar filament arranged in one or two layers. Comparative phylogenetic analysis using rDNA shows N. grylli to be closely related to another orthopteran microsporidian, Nosema locustae, and to Nosema whitei from the confused flour beetle, Tribolium confusum. Antonospora scoticae, a parasite of the communal bee Andrena scotica, is a sister taxon to these three Nosema species. The sequence divergence and morphological traits clearly separate this group of "Nosema" parasites from the "true" Nosema clade containing Nosema bombycis. We therefore propose to change the generic name of N. grylli and its close relative N. locustae to Paranosema n. comb. We leave N. whitei in former status until more data on fine morphology of the species are obtained.
Добавил в систему: Насонова Елена Станиславовна

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Establishment of the new genus Paranosema based on the ultrastructure and molecular phylogeny of the type species Paranosema grylli Gen. Nov., Comb. Nov (Sokolova, Selezniov, Dolgikh, Issi 1994), from the cricket Gryllus bimaculatus Degстатья

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