六种新热带棕树种的完整叶绿体基因组,结构比较和进化动态模式
Ana Flávia Francisconi1, Jonathan Andre Morales Marroquín1, Luiz Augusto Cauz-Santos2
1Programa de Pós-Gradução em Genética e Biologia Molecular, Universidade Estadual de Campinas, R. Monteiro Lobato, 255-Barão Geraldo, Campinas, São Paulo, CEP 13083-862, Brazil.
Scientific reports
|November 23, 2023
概括
这项研究测序了棕的叶绿体基因组,揭示了Arecaceae家族内的保存结构和进化动态. 关键发现突出了基因组大小变化和RNA编辑部位在相关物种中的保护.
科学领域:
- 植物学 植物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 树 (棕) 家族分布在全球,几种物种具有重要的经济和工业意义.
- 了解各种棕树种的遗传构成对于它们的利用和保护至关重要.
研究的目的:
- 测序和分析经济重要Arecaceae物种的叶绿体基因组.
- 研究棕树家族中的结构性保护,基因组大小变异和RNA编辑部位.
- 提供对Arecaceae的进化关系和动态的见解.
主要方法:
- 精选棕种的全叶绿体基因组测序,包括Acrocomia,Bactris,Copernicia和Syagrus.
- 进行比较基因组分析以评估合成和结构保护.
- 单序重复 (SSR) 和RNA编辑站点的识别和分析.
- 遗传学分析以确定进化关系.
主要成果:
- 叶绿体基因组大小在物种之间有所不同,其中Copernicia spp. 它们是最大的,Syagrus romanzoffiana/Bactris gasipaes是最小的.
- 在棕树叶叶叶细胞基因组中观察到高合成率,这表明结构性保存.
- 单个序列重复 (SSR) 显示了保留的分布模式,其中Copernicia spp. 有较少分散的重复.
- 所有已识别的RNA编辑部位都是C-to-U转换,密切相关的物种共享更多的部位.
- 遗传学分析强烈支持Acrocomia物种之间的密切关系.
结论:
- 棕的叶绿体基因组在结构和基因含量方面表现出显著的保存.
- 微妙的结构变化和SSR分布的差异有助于了解棕的进化动态.
- 这项研究为进一步研究Arecaceae进化和应用用途提供了基因组基础.
相关概念视频
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
12.5K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
12.5K
Evolutionary Relationships through Genome Comparisons
5.8K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.8K
Anatomy of Chloroplasts
109.4K
Green algae and plants, including green stems and unripe fruit, harbor chloroplasts—the vital organelles where photosynthesis takes place. In plants, the highest density of chloroplasts is found in the mesophyll cells of leaves.
109.4K
The Anatomy of Chloroplasts
5.2K
Green algae and plants, including green stems and unripe fruit, harbor specialized organelles called chloroplasts to carry out photosynthesis. They coordinate both stages of photosynthesis — the light-dependent reactions and the light-independent reactions. The light-dependent reactions use sunlight to release oxygen and produce chemical energy in the form of ATP and NADPH, and the light-independent reactions capture CO2 and use ATP and NADPH to produce sugar.
Structure of...
Structure of...
5.2K
Export of Mitochondrial and Chloroplast Genes
3.7K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
3.7K
Gene 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


