表观遗传重新连接 形成不同的基因组 病毒响应电路中的可塑性 大豆中的病毒响应电路
Ting Fang1, Wenxuan Huang1, Yueying Wu1
1State Key Laboratory of Plant Environmental Resilience, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China.
Plant, cell & environment
|February 19, 2026
概括
大豆马赛克病毒感染改变了表观遗传调节不同于耐药和易感的大豆. 敏感植物显示减少24核酸小干扰RNA和广泛的染色体变化,影响基因表达.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 病毒学 病毒学
背景情况:
- 表观遗传修饰对于植物应激反应至关重要.
- 在表观遗传层面上了解作物对病毒感染的反应至关重要.
- 大豆马赛克病毒 (SMV) 对大豆生产构成重大威胁.
研究的目的:
- 调查大豆品种的表观遗传变异,这些品种对SMV有着相反的耐药性.
- 阐明SMV感染如何重塑基于染色体的表观遗传调节网络.
- 为了识别小干扰RNA (siRNA) 水平和DNA甲基化模式的差异.
主要方法:
- 在SMV感染后对抗性和易受性大豆品种的比较分析.
- 对24核酸小干扰RNAs (24-nt siRNAs) 的量化.
- DNA甲基化分析和染色质可访问性测试.
主要成果:
- 在易受感染的品种中,SMV感染削弱了24-nt siRNAs,而在耐药品种中增加了它们.
- 24-nt siRNA 依赖的 DNA 甲基化发生在圣色区域,而 LTR 逆转移子显示独立的甲基化.
- 敏感品种表现出与siRNA枯竭相关的广泛的染色质重塑,而耐药品种显示出较轻微的变化.
结论:
- 在大豆中,SMV感染会根据耐药性水平触发不同的表观遗传调节网络.
- 24nt siRNAs和DNA甲基化中的变异可能会影响与自相关的基因表达.
- 这项研究为了解植物病毒相互作用中的表观遗传调节提供了基础.
相关概念视频
Epigenetic Regulation
4.0K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
4.0K
Epigenetic Regulation
34.0K
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
34.0K
Viral Recombination
25.3K
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
25.3K
Gene Regulation During Sporulation
540
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
540
Regulation of Expression Occurs at Multiple Steps
26.6K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
26.6K
Regulation of Expression Occurs at Multiple Steps
4.0K
4.0K


