To be or not to be a flatworm: the acoel controversy.
To be or not to be a flatworm: the acoel controversy.
复制标题
DOI：
10.1371/journal.pone.0005502
复制
发表时间：
2009
期刊：
影响因子：
3.7
通讯作者：
Ladurner P
中科院分区：
文献类型：
--
作者：
Egger B;Steinke D;Tarui H;De Mulder K;Arendt D;Borgonie G;Funayama N;Gschwentner R;Hartenstein V;Hobmayer B;Hooge M;Hrouda M;Ishida S;Kobayashi C;Kuales G;Nishimura O;Pfister D;Rieger R;Salvenmoser W;Smith J;Technau U;Tyler S;Agata K;Salzburger W;Ladurner P
自首次描述以来，acoels被认为是扁形虫（扁形动物）的成员。然而，没有明确的synapomorphies之间的三个大型扁形虫类群-的Catenulida，Acoelomorpha和Rhabditophora -已被确定为日期。另一方面，分子寄生虫通常将体腔与其他扁形虫分开。因此，我们自己的多位点系统发育分析使用43个基因和23种动物的地方acoel扁形虫Isodiametra pulchra在所有Bilateria的基础上，远离其他扁形虫。相比之下，新的数据的分布和增殖的干细胞和特定模式的表皮更换构成了一个强大的synapomorphy的Acoela加上主要组的扁形虫，杆。piwi样基因不仅在性腺中表达，而且在成体干细胞中也表达，这是双侧性动物的另一个独特特征。这两个独立的干细胞相关的字符把Acoela到Platyhelminthes-Lophotrochozoa分支，并占最简约的进化解释表皮细胞更新的Bilateria。大多数可用的多基因分析产生矛盾的结果，关于在生命树的位置acoels。鉴于这些系统发生组冲突以及发育和形态数据与系统发生组结果的矛盾，扁形动物门的单系性和无孔动物的位置仍然没有得到解决。根据这些数据，扁形动物中包含无体腔虫，以及它们与扁形动物分离为基底两侧动物都是得到充分支持的替代方法。
Since first described, acoels were considered members of the flatworms (Platyhelminthes). However, no clear synapomorphies among the three large flatworm taxa - the Catenulida, the Acoelomorpha and the Rhabditophora - have been characterized to date. Molecular phylogenies, on the other hand, commonly positioned acoels separate from other flatworms. Accordingly, our own multi-locus phylogenetic analysis using 43 genes and 23 animal species places the acoel flatworm Isodiametra pulchra at the base of all Bilateria, distant from other flatworms. By contrast, novel data on the distribution and proliferation of stem cells and the specific mode of epidermal replacement constitute a strong synapomorphy for the Acoela plus the major group of flatworms, the Rhabditophora. The expression of a piwi-like gene not only in gonadal, but also in adult somatic stem cells is another unique feature among bilaterians. These two independent stem-cell-related characters put the Acoela into the Platyhelminthes-Lophotrochozoa clade and account for the most parsimonious evolutionary explanation of epidermal cell renewal in the Bilateria. Most available multigene analyses produce conflicting results regarding the position of the acoels in the tree of life. Given these phylogenomic conflicts and the contradiction of developmental and morphological data with phylogenomic results, the monophyly of the phylum Platyhelminthes and the position of the Acoela remain unresolved. By these data, both the inclusion of Acoela within Platyhelminthes, and their separation from flatworms as basal bilaterians are well-supported alternatives.
登录
查看更多内容
影响因子：
4.5
作者：
Palakodeti, Dasaradhi;Smielewska, Magda;Graveley, Brenton R.
通讯作者：
Graveley, Brenton R.
影响因子：
56.9
作者：
Jimenez-Guri, Eva;Philippe, Herve;Holland, Peter W. H.
通讯作者：
Holland, Peter W. H.
影响因子：
2.7
作者：
Müller, WA;Teo, R;Frank, U
通讯作者：
Frank, U
影响因子：
2.7
作者：
Newmark, PA;Alvarado, AS
通讯作者：
Alvarado, AS
影响因子：
11.8
作者：
Guo, Tingxia;Peters, Antoine H. F. M.;Newmark, Phillip A.
通讯作者：
Newmark, Phillip A.