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相关概念视频

Position-effect Variegation02:32

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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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...

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相关实验视频

Updated: May 12, 2026

Application of Two-spotted Spider Mite Tetranychus urticae for Plant-pest Interaction Studies
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解码植物诱导的转录基因变异性和一致性在两个相关的多虫虫不同宿主范围.

Lei Chen1, Li-Xue Guo1, Xin-Yue Yu1

  • 1Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, China.

Molecular ecology
|August 29, 2024
PubMed
概括

一般的食草动物表现出不同的转录可塑性,影响宿主范围. Tetranychus urticae比T. truncatus具有更高的可塑性,影响基因表达和解毒途径.

关键词:
这种代谢由 CYP392B3B3 组成.主机转移 主机转移 主机转移核心基因 核心基因 核心基因多的蜘蛛.转录性可塑性 转录性可塑性

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科学领域:

  • * 进化生物学 进化生物学
  • * 分子生态学 * 分子生态学
  • * 基因组学 是一个学科.

背景情况:

  • * 一般的食草动物往往比专家表现出更大的转录可塑性.
  • *多性,或广泛的饮食范围,可能会影响一般主义物种之间的宿主范围变化.
  • * 蜘蛛虫 (Tetranychus spp.) 是一种蜘蛛. 提供一个模型系统来研究饮食范围和宿主范围.

研究的目的:

  • * 调查转录性可塑性是否有助于两种具有不同多性水平的泛型蜘蛛虫物种的宿主范围变化.
  • * 为了比较Tetranychus urticae (广泛的宿主范围) 和Tetranychus truncatus (更狭窄的宿主范围) 的转录可塑性.
  • * 确定这些物种宿主植物适应的基因机制.

主要方法:

  • * 对Tetranychus urticae和Tetranychus truncatus种群的比较转录基因分析,这些种群暴露于不同的植物宿主 (豆类,棉花,黄瓜,茄子).
  • *基因表达造型,以评估转录性可塑性和基于人口的变异性.
  • * 同表达网络分析以确定关键基因模块和参与宿主植物反应的枢纽基因.
  • *基因沉默实验 (CYP基因) 评估特定基因在宿主适应中的功能作用.

主要成果:

  • * 与Tetranychus truncatus相比,Tetranychus urticae的转录可塑性显著更高.
  • * 这两种物种在接触不同宿主时,都提高了参与药物/异生菌代谢的基因,T. urticae参与了更广泛的途径.
  • * 同表达网络揭示了与排毒相关的共同枢纽基因,但T. urticae显示了更可变的调节.
  • *沉默共享的CYP基因提高了共同宿主的性能,但对茄子的T. truncatus生育能力产生了负面影响.

结论:

  • *即使在一般食草动物中,转录可塑性也存在很大差异,并且与宿主范围有关.
  • * T. urticae 的广泛的转录组变异可能会弥补特定枢纽基因的潜在缺陷.
  • *排毒途径对于这些蜘蛛虫物种的宿主植物适应至关重要.
  • *转录基因变异性的细微差别有助于一般食草动物的生态成功和宿主范围.