"Slime Molds" among the Tubulinea (Amoebozoa): Molecular Systematics and Taxonomy of Copromyxa
"Slime Molds" among the Tubulinea (Amoebozoa): Molecular Systematics and Taxonomy of Copromyxa
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DOI：
10.1016/j.protis.2010.09.003
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发表时间：
2011-04-01
期刊：
影响因子：
2.5
通讯作者：
Spiegel, Frederick W.
中科院分区：
文献类型：
--
作者：
Brown, Matthew W.;Silberman, Jeffrey D.;Spiegel, Frederick W.
变形粪黏菌（Copromyxa protea）是一种生活在粪便中的变形虫生物，聚集形成简单的宏观子实体结构，即由单细胞类型组成的囊果。在最近的努力，以寻找不太知名的sorocarpic原生生物被认为是“细胞黏菌”，或聚集结果实的变形虫的系统发育位置，我们分离C。Protea和测序的核编码的小亚基核糖体RNA基因从四个样本收集牛农场在美国中部。对这些数据的系统发育分析将C. Protea在真核生物超类群Amoebozoa与Tubulocyte一起，其中以前没有报道过聚集结实的习惯。这与滋养体的形态一致。事实上，Copromyxa protea被发现与Hartmannella cantabrigiensis和一种已经丢失的阿米巴分离株Hartmannella sp. 4/3Da/10非常密切相关。Copromyxa + H. cantabrigiensis是Glaeseria的姐妹，Glaeseria和Amoebidae（Amoeba + Chaos）是姐妹。我们建议重新命名，H。cantabrigiensis和C.将分离物4/3Da/10命名为C.变形虫未来的工作需要看看这些新分配的Copromyxa属成员是否也显示出果实能力的证据。(C)2010年Elsevier GmbH。All rights reserved.
Copromyxa protea is a dung-inhabiting amoeboid organism that aggregates to form simple macroscopic fruiting structures, sorocarps, which are composed of a single cell type. In a recent effort to find the phylogenetic positions of the less well-known sorocarpic protists considered to be "cellular slime molds," or aggregatively fruiting amoebae, we isolated C. protea and sequenced the nuclear-encoded small subunit ribosomal RNA gene from four samples collected from cattle farms in the central USA. Phylogenetic analyses of these data place C. protea in the eukaryotic supergroup Amoebozoa together with the Tubulinea, in which there has been no previous report of an aggregative fruiting habit. This is consistent with the morphology of the trophozoites. In fact, Copromyxa protea is found to be very closely related to Hartmannella cantabrigiensis and to a since lost amoeba isolate, Hartmannella sp. 4/3Da/10. This new grouping of Copromyxa + H. cantabrigiensis is sister to Glaeseria, which together are sister to the Amoebidae (Amoeba + Chaos). We suggest renaming, H. cantabrigiensis as C. cantabrigiensis and designate isolate 4/3Da/10 as C. protea. Future work is needed to see if these newly assigned members of the genus Copromyxa also show evidence of an ability to fruit. (C) 2010 Elsevier GmbH. All rights reserved.