欧佩拉贡尼米德的基因组位置,丰富多样的深海异构动物
Gordon Lax1, Noriko Okamoto1,2, Patrick J Keeling1
1Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada.
The ISME journal
|March 8, 2024
概括
以前人们对Eupelagonemids,丰富的深海原生动物,了解得很少. 新的转录基因数据揭示了它们的进化位置与其他双类动物不同,为深海生物多样性提供了洞察力.
科学领域:
- 深海微生物学 深海微生物学
- 简介:真核生物的进化过程.
- 抗议者的多样性.
背景情况:
- 欧佩拉贡尼米德 (以前的深海海性Diplonemids I) 是海洋深处的丰富多样的异构性原生体.
- 由于缺乏培养标本,生物数据有限,只有一种物种被正式描述.
- 之前的研究依赖于环境DNA序列,表明与diplonemids的联系.
研究的目的:
- 为了确定eupelagonemids在真核树内的进化位置.
- 为了解决对这个生态重要群体缺乏生物信息的问题.
- 为了利用单细胞转录组学进行遗传学分析.
主要方法:
- 在两个eupelagonemid细胞上进行单细胞转录组学.
- 进行了SSU rRNA基因测序和遗传学分析.
- 为了进化重建,利用了125基因的基因组学矩阵.
主要成果:
- SSU rRNA基因基因表系表明,两种分析的细胞代表了不同的eupelagonemid亚类,与*Eupelagonema oceanica*不同.
- 遗传学分析显示,eupelagonemids分支是diplonemid亚组Hemistasiidae的姐妹.
- 这与之前的一些生态调查数据解释相矛盾.
结论:
- 欧佩拉贡尼米德 (Eupelagonemids) 代表了与迪普罗尼米德 (Diplonemids) 内部或与其密切相关的独特进化血统.
- 单细胞转录组学是研究未培养的深海原生体的一个可行的方法.
- 需要进一步的研究,以充分理解eupelagonemid的生物学和生态作用.
更多相关视频
14:38Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
Published on: April 20, 2012
11.4K
11:55Streamlined Sampling and Cultivation of the Pelagic Cosmopolitan Larvacean, Oikopleura dioica
Published on: June 16, 2020
8.9K
相关概念视频
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
32.4K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
32.4K
01:24Eukaryotic Evolution
33.8K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
33.8K
02:05Gene Evolution - Fast or Slow?
7.1K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.1K
03:21Phylogenetic Trees
45.3K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
45.3K
01:17What is an Ecosystem?
39.6K
Overview
39.6K
02:35What is Evolutionary History?
36.4K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
36.4K