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首页> 外文期刊>Journal of Parasitology >SPORE ORNAMENTATION OF HAPLOSPORIDIUM NELSONI AND HAPLOSPORIDIUM COSTALE (HAPLOSPORIDIA), AND INCONGRUENCE OF MOLECULAR PHYLOGENY AND SPORE ORNAMENTATION IN THE HAPLOSPORIDIA
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SPORE ORNAMENTATION OF HAPLOSPORIDIUM NELSONI AND HAPLOSPORIDIUM COSTALE (HAPLOSPORIDIA), AND INCONGRUENCE OF MOLECULAR PHYLOGENY AND SPORE ORNAMENTATION IN THE HAPLOSPORIDIA

机译：纳氏肝炎球菌和小肠结肠炎（Hoplosordia）的孢子繁殖，以及横纹球菌的分子系统发育和孢子繁殖的不一致

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摘要

Spore ornamentation of Haplosporidium nelsoni and Haplosporidium costale was determined by scanning electron microscopy. For H. nelsoni, the spore surface was covered with individual ribbons that were tightly bound together and occurred as a single sheet. In some spores, this layer was overlaid with a network of branching fibers, about 0.05 μm in diameter, which often was dislodged from the spore at the aboral pole. For H. costale, ornamentation consisted of a sparse network of branching fibers on the spore surface. Molecular phylogenetic analysis of the phylum Haplosporidia revealed that Urosporidium, Bonamia, and Minchinia were monophyletic but that Haplosporidium was paraphyletic. All species of Minchinia have ornamentation composed of epispore cytoplasm, supporting the monophyly of this genus. The presence of spores with a hinged operculum and spore wall-derived ornamentation in Bonamia perspora confounds the distinction between Bonamia and Haplosporidium. Species with ornamentation composed of outer spore wall material and attached to the spore wall do not form a monophyletic group in the molecular phylogenetic analysis. These results suggest that the widely accepted practice of assigning all species with spore wall-derived ornamentation to Haplospordium cannot be supported and that additional genera are needed in which to place some species presently assigned to Haplosporidium.
机译：通过扫描电子显微镜确定纳氏单胞菌和单孢单胞菌的孢子装饰。对于纳氏梭菌，孢子表面覆盖有紧密结合在一起的单个条带，并呈单片状出现。在某些孢子中，该层覆盖有直径约0.05μm的分支纤维网络，该分支纤维经常在基底极从孢子上脱落。对于H.costale，装饰物由孢子表面上稀疏的分支纤维网络组成。对Haplosporidia门的分子系统发育分析表明，Urosporidium，Bonamia和Minchinia是单系统的，而Haplosporidium是副系统的。 Minchinia的所有物种都具有由表孢子细胞质组成的装饰物，支持该属的单性。 Bonamia perspora中存在带铰接孔的孢子和源自孢子壁的装饰物，混淆了Bonamia和Haplosporidium的区别。在分子系统发育分析中，带有由外孢子壁材料组成并附着在孢子壁上的带有装饰物的物种不会形成单系统的基团。这些结果表明，不能支持将具有孢子壁衍生装饰物的所有物种分配给单倍孢子的广泛接受的实践，并且需要另外的属来放置当前分配给单倍孢子虫的某些物种。

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