Eumycetozoa = Amoebozoa?: SSUrDNA phylogeny of protosteloid slime molds and its significance for the amoebozoan supergroup.
Eumycetozoa = Amoebozoa?: SSUrDNA phylogeny of protosteloid slime molds and its significance for the amoebozoan supergroup.
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DOI：
10.1371/journal.pone.0006754
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发表时间：
2009-08-25
期刊：
影响因子：
3.7
通讯作者：
Silberman JD
中科院分区：
文献类型：
--
作者：
Shadwick LL;Spiegel FW;Shadwick JD;Brown MW;Silberman JD
变形虫产生由茎和孢子组成的子实体，并被归类为与粘胃虫密切相关的变形虫，传统上被归入真菌类分类单元。传统上，真菌动物门分为三类：粘胃动物、盘基网动物和所谓的原网动物。盘基网柄菌和粘胃虫都产生可能含有数百个孢子的多细胞子实体。原骨类变形虫是指产生由茎和一个或几个孢子组成的简单子实体的变形虫。类原骨生物被认为是粘腹动物和盘基骨动物的祖先，并且它们已被用来提出关于该类群内子实体进化的假设。粘胃纲和盘基网纲的分子系统发育研究均已发表，但对原骨纲的分子系统发育研究却很少。在这里，我们提供基于小亚基核糖体 RNA 基因 (SSU) 的系统发育树，其中包括 21 个原骨以及来自多种变形虫和其他真核生物的公开序列。 SSU树恢复了七个得到良好支持的分支，这些分支包含原骨类，但似乎彼此之间没有特定的相关性，并且通常散布在从未报道过结果实的已建立的变形虫群体中。事实上，我们表明至少有两个类群明确属于变形虫谱系，而这些谱系从未有过结果的报道。这些分析表明我们可以拒绝单系真菌真菌 (Eumycetozoa, s.l.)。因此，我们在下文中将那些具有简单结果的粘菌称为原类变形虫和/或原类粘菌，而不是原类。这些结果增加了我们对变形虫生物多样性的理解，并表明必须整合理解非结果变形虫和孢子变形虫的范式。最后，我们提出了未来对原类变形虫和非结果变形虫的研究策略，并讨论了这项工作对分类学家和系统基因组学家的影响。
Amoebae that make fruiting bodies consisting of a stalk and spores and classified as closely related to the myxogastrids have classically been placed in the taxon Eumycetozoa. Traditionally, there are three groups comprising Eumycetozoa: myxogastrids, dictyostelids, and the so-called protostelids. Dictyostelids and myxogastrids both make multicellular fruiting bodies that may contain hundreds of spores. Protostelids are those amoebae that make simple fruiting bodies consisting of a stalk and one or a few spores. Protostelid-like organisms have been suggested as the progenitors of the myxogastrids and dictyostelids, and they have been used to formulate hypotheses on the evolution of fruiting within the group. Molecular phylogenies have been published for both myxogastrids and dictyostelids, but little molecular phylogenetic work has been done on the protostelids. Here we provide phylogenetic trees based on the small subunit ribosomal RNA gene (SSU) that include 21 protostelids along with publicly available sequences from a wide variety of amoebae and other eukaryotes. SSU trees recover seven well supported clades that contain protostelids but do not appear to be specifically related to one another and are often interspersed among established groups of amoebae that have never been reported to fruit. In fact, we show that at least two taxa unambiguously belong to amoebozoan lineages where fruiting has never been reported. These analyses indicate that we can reject a monophyletic Eumycetozoa, s.l. For this reason, we will hereafter refer to those slime molds with simple fruiting as protosteloid amoebae and/or protosteloid slime molds, not as protostelids. These results add to our understanding of amoebozoan biodiversity, and demonstrate that the paradigms for understanding both nonfruiting and sporulating amoebae must be integrated. Finally, we suggest strategies for future research on protosteloid amoebae and nonfruiting amoebae, and discuss the impact of this work for taxonomists and phylogenomicists.
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DOI：
10.2307/3224288
发表时间：
1965-01-01
期刊：
TRANS AMER MICROSCOP SOC
影响因子：
--
作者：
BOVEE, EUGENE C.
通讯作者：
BOVEE, EUGENE C.
影响因子：
10.7
作者：
Fahrni, JF;Bolivar, I;Pawlowski, J
通讯作者：
Pawlowski, J
影响因子：
2.5
作者：
Kudryavtsev, Alexander;Wylezich, Claudia;Michel, Rolf
通讯作者：
Michel, Rolf
DOI：
10.1073/pnas.94.22.12007
发表时间：
1997-10-28
影响因子：
11.1
作者：
Baldauf, SL;Doolittle, WF
通讯作者：
Doolittle, WF
影响因子：
2.9
作者：
Cavalier-Smith, T
通讯作者：
Cavalier-Smith, T