Description of Metchnikovella spiralis sp n. (Microsporidia: Metchnikovellidae), with notes on the ultrastructure of metchnikovellids

Sokolova, Y.Y.; Paskerova, G.G.; Rotari, Y.M.; Nassonova, E.S.; Smirnov, A.V.

Авторы: Sokolova Y.Y., Paskerova G.G., Rotari Y.M., Nassonova E.S., Smirnov A.V.
Журнал: Parasitology
Том: 141
Номер: 8
Год издания: 2014
Издательство: Cambridge University Press
Местоположение издательства: United Kingdom
Первая страница: 1108
Последняя страница: 1122
DOI: 10.1017/S0031182014000420
Аннотация: The present paper reports results of a transmission electron microscopy study of a new metchikovellid microsporidium. It was isolated from gregarines Polyrhabdina sp. inhabiting guts of polychaetes Pygospio elegans sampled at the White Sea silt littoral zone. Free sporogony (FS) occurred in the life cycle of the microsporidium alongside sac-bound sporogony (BS). Free spores resided in a parasitophorous vacuole and were of typical metchnikovellidean structure, uninucleate and oblong. They measured on sections 2·0-3·2×1·3-1·9 μm. The life cycle included pre-sporogonial stages represented by dikaryotic cells and 4-nucleate cells with coupled nuclei. A multinucleate sporogonial plasmodium of FS split in numerous (>10) sporoblasts. In BS segregation of sporoblasts occurred within thick-walled cysts by internal budding. Spore sacs of this microsporidium, measuring on average 11·6×4·7 μm, were limited by a thick electron-dense wall, externally ornamented with spirally wound cords of dense material. These oval spore sacs contained eight barrel-shaped spores, comparable in size and ultrastructure to FS spores. Ultrastructure of both types of spores and intracellular development of the new microsporidium and Metchnikovella spp. were similar, suggesting they belong to the same genus. In this paper we describe a new species Metchnikovella spiralis and discuss morphology of metchnikovellids in the context of putative evolutionary history of Microsporidia. DOI: 10.1017/S0031182014000420
Добавил в систему: Насонова Елена Станиславовна

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Description of Metchnikovella spiralis sp n. (Microsporidia: Metchnikovellidae), with notes on the ultrastructure of metchnikovellidsстатья

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