在Boechera的性繁殖和apomictic繁殖中,RNA基酶的差异表达和进化多样化
Laura Binmöller1, Christopher Volkert1, Christiane Kiefer1
1Centre for Organismal Studies Heidelberg, Department of Biodiversity and Plant Systematics, Heidelberg University, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany.
Journal of experimental botany
|January 23, 2024
概括
像Boechera这样的apomictic植物表现出改变的繁殖,省略了半转化,在没有受精的情况下形成胚胎. RNA测序揭示了RNA基酶的差异表达,包括FAS4同类物,对于植物繁殖至关重要.
科学领域:
- 植物生殖生物学 植物生殖生物学
- 分子遗传学 分子遗传学
- 进化生物学是进化的生物学.
背景情况:
- 植物的性繁殖涉及中变和双重受精.
- 博赫拉的阿波米克斯绕过了半变,伴生形成了胚胎和中央细胞受精.
- 了解这些独特的生殖策略的遗传调节至关重要.
研究的目的:
- 为了研究在Boechera的性繁殖和apomictic繁殖之间的转录差异.
- 识别关键基因,如参与调节这些生殖途径的RNA螺旋酶.
- 探索特定基因的进化历史和功能意义,如FAS4.
主要方法:
- 用RNA测序 (RNA-seq) 来比较Boechera加入的生殖组织中的基因表达特征.
- 不同基因表达分析的重点是女性生殖卵子组织.
- 功能分析涉及研究Arabidopsis thaliana突变系对FASCIATED STEM4 (FAS4) 基因的研究.
主要成果:
- 确认RNA螺旋酶在植物生殖系中被丰富.
- 一个有限数量的RNA基酶显示出apomictic和性Boechera体细胞之间的差异表达.
- 发现Arabidopsis thaliana FAS4的同类基因FAS4在Boechera中具有多个副本,这表明了亚功能化.
结论:
- 转录的差异,特别是像FAS4这样的RNA螺旋酶中的差异,有助于性繁殖和阿波密克生殖之间的差异.
- 博赫拉的多个FAS4同类可能在调节生殖发育方面发挥作用.
- 在Arabidopsis中,AtFAS4对于成功的雄性和雌性配体发生是必不可少的,这凸显了它在植物繁殖中的关键作用.
相关概念视频
02:32Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
00:43Bacterial RNA Polymerase
29.5K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
29.5K
02:38Asexual Reproduction
31.3K
Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
31.3K
00:55DNA Helicases
21.3K
DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
21.3K
01:53Bacterial Transcription
28.2K
RNA polymerase (RNAP) carries out DNA-dependent RNA synthesis in both bacteria and eukaryotes. Bacteria do not have a membrane-bound nucleus. So, transcription and translation occur simultaneously, on the same DNA template.
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
28.2K
02:57piRNA - Piwi-interacting RNAs
6.9K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
6.9K