期刊
JOURNAL OF EUKARYOTIC MICROBIOLOGY
卷 60, 期 3, 页码 235-246出版社
WILEY
DOI: 10.1111/jeu.12021
关键词
biodiversity; ciliates; cytochrome c oxidase subunit I (cox1); groundwater; interior-branch test; phylogeny; silverline pattern; SSU rDNA
类别
资金
- German Science Fund [DFG Ar 288/7]
- Austrian Science Fund (FWF) [P20360-B17, P22846-B17]
- Austrian Science Fund (FWF) [P 20360, P 22846] Funding Source: researchfish
- Austrian Science Fund (FWF) [P22846] Funding Source: Austrian Science Fund (FWF)
The identification of species within the genus Tetrahymena is known to be difficult due to their essentially identical morphology, the occurrence of cryptic and sibling species and the phenotypic plasticity associated with the polymorphic life cycle of some species. We have combined morphology and molecular biology to describe Tetrahymena aquasubterranea n. sp. from groundwater of Cape Town, Republic of South Africa. The phylogenetic analysis compares the cox1 gene sequence of T. aquasubterranea with the cox1 gene sequences of other Tetrahymena species and uses the interior-branch test to improve the resolution of the evolutionary relationships. This showed a considerable genetic divergence of T. aquasubterranea to its next relative, T. farlyi, of 9.2% (the average cox1 divergence among bona fide species of Tetrahymena is similar to 10%). Moreover, the analysis also suggested a sister relationship between T. aquasubterranea and a big clade comprising T. farleyi, T. tropicalis, T. furgasoni and T. mobilis. The morphological data available for these species show that they share with T. aquasubterranea a pyriformis-like life style and at least two of them, T. farleyi and T. mobilis, a similar type II silverline pattern consisting of primary and secondary meridians. Tetrahymena aquasubterranea exhibits a biphasic life cycle with trophonts and theronts, is amicronucleate, and feeds on bacteria.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据