Marine Isolates of Trimastix marina Form a Plesiomorphic Deep-branching Lineage within Preaxostyla, Separate from Other Known Trimastigids (Paratrimastix n. gen.)

doi:10.1016/j.protis.2015.07.003

	Marine Isolates of Trimastix marina Form a Plesiomorphic Deep-branching Lineage within Preaxostyla, Separate from Other Known Trimastigids (Paratrimastix n. gen.)
	Zhang, QD; Taborsky, P; Silberman, JD; Panek, T; Cepicka, I; Simpson, AGB; Simpson, AGB (reprint author), Dalhousie Univ, Dept Biol, Halifax, NS B3H 4R2, Canada. asimpso2@dal.ca
发表期刊	PROTIST
ISSN	1434-4610
	2015-09-01
卷号	166 期号:4 页码:468-491
关键词	Anaerobe Cytoskeleton Flagellar Apparatus Oxymonads Phylogeny Ultrastructure
DOI	10.1016/j.protis.2015.07.003
产权排序	[Zhang, Qiandian; Simpson, Alastair G. B.] Dalhousie Univ, Dept Biol, Halifax, NS B3H 4R2, Canada; [Zhang, Qiandian] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Taborsky, Petr; Panek, Tomas; Cepicka, Ivan] Charles Univ Prague, Fac Sci, Dept Zool, CR-12844 Prague 2, Czech Republic; [Silberman, Jeffrey D.] Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701 USA
作者部门	中科院烟台海岸带研究所知识产出
英文摘要	Trimastigids are free-living, anaerobic protists that are closely related to the symbiotic oxymonads, forming together the taxon Preaxostyla (Excavata: Metamonada). We isolated fourteen new strains morphologically corresponding to two species assigned to Trimastix (until now the only genus of trimastigids), Trimastix marina and Trimastix pyriformis. Unexpectedly, marine strains of Trimastix marina branch separately from freshwater strains of this morphospecies in SSU rRNA gene trees, and instead form the sister group of all other Preaxostyla. This position is confirmed by three-gene phylogenies. Ultrastructural examination of a marine isolate of Trimastix marina demonstrates a combination of trimastigid-like features (e.g. preaxostyle-like I fibre) and ancestral characters (e.g. absence of thickened flagellar vane margins), consistent with inclusion of marine T. marina within Preaxostyla, but also supporting its distinctiveness from 'freshwater T. marina' and its deep-branching position within Preaxostyla. Since these results indicate paraphyly of Trimastix as currently understood, we transfer the other better-studied trimastigids to Paratrimastix n. gen. and Paratrimastigidae n. fam. The freshwater form previously identified as T. marina is described as Paratrimastix eleionoma n. sp., and Trimastix pyriformis becomes Paratrimastix pyriformis n. comb. Because of its phylogenetic position, 'true' Trimastix is potentially important for understanding the evolution of mitochondrion-related organelles in metamonads. (C) 2015 Elsevier GmbH. All rights reserved.
文章类型	Article
收录类别	SCI
语种	英语
关键词[WOS]	MULTIPLE SEQUENCE ALIGNMENT ; RIBOSOMAL-RNA PHYLOGENY ; EXCAVATE TAXA ; ULTRASTRUCTURE ; FLAGELLATE ; DIPLOMONADS ; DIVERSITY ; EUKARYOTA ; ORGANIZATION ; SYSTEMATICS
研究领域[WOS]	Microbiology
WOS记录号	WOS:000361496200006
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/9991
专题	中国科学院烟台海岸带研究所知识产出
通讯作者	Simpson, AGB (reprint author), Dalhousie Univ, Dept Biol, Halifax, NS B3H 4R2, Canada. asimpso2@dal.ca
推荐引用方式 GB/T 7714	Zhang, QD,Taborsky, P,Silberman, JD,et al. Marine Isolates of Trimastix marina Form a Plesiomorphic Deep-branching Lineage within Preaxostyla, Separate from Other Known Trimastigids (Paratrimastix n. gen.)[J]. PROTIST,2015,166(4):468-491.
APA	Zhang, QD.,Taborsky, P.,Silberman, JD.,Panek, T.,Cepicka, I.,...&Simpson, AGB .(2015).Marine Isolates of Trimastix marina Form a Plesiomorphic Deep-branching Lineage within Preaxostyla, Separate from Other Known Trimastigids (Paratrimastix n. gen.).PROTIST,166(4),468-491.
MLA	Zhang, QD,et al."Marine Isolates of Trimastix marina Form a Plesiomorphic Deep-branching Lineage within Preaxostyla, Separate from Other Known Trimastigids (Paratrimastix n. gen.)".PROTIST 166.4(2015):468-491.

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