在一个适应寒冷的鱼体中,对代内和代际环境变暖的转录组反应
Chantelle M Penney1, Gary Burness2, Gerardo Zapata3
1Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, Canada, K9J 7B8.
The Journal of experimental biology
|March 28, 2025
概括
气候变化威胁到像湖鱼这样适应寒冷的物种. 虽然父母的适应有一定的影响,后代的后代.
科学领域:
- 环境科学 环境科学
- 基因组学就是基因组学.
- 气候变化生物学 气候变化生物学
背景情况:
- 由于快速变暖,适应寒冷的物种面临着气候变化带来的重大威胁.
- 代际热可塑性是适应寒冷的生物对温度上升做出反应的潜在机制.
研究的目的:
- 为了研究湖 (Salvelinus namaycush) 对高温的分子反应.
- 检查一代内 (后代) 和代际 (父母) 温暖适应对基因表达的影响.
主要方法:
- 用RNA测序来分析幼鱼的基因表达差异.
- 实验设计包括不同的后代和父母适应温度.
主要成果:
- 在一代 (后代) 内的温暖适应对基因表达产生了比代际 (父母) 适应更大的影响.
- 不同表达的基因与热应激,信号传递,免疫功能和转录调节有关.
- 基因表达模式受到后代适应温度的影响,无论是独立的还是与父母适应相结合的.
结论:
- 在高温下,在湖鱼中观察到基因表达的代际影响.
- 这些代际影响不太可能为人口提供足够的适应,以应对气候变化引发的显著变暖.
相关概念视频
Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Responses to Heat and Cold Stress
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
Responses to Salt Stress
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Gene-Environment Interactions
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
Derivatives: Problem Solving
Temperature-Dependent Growth of Brook TroutThe growth of brook trout is closely influenced by water temperature. Experimental data demonstrate how trout weight changes over a 24-day period in response to varying water temperatures. At lower temperatures, such as 15.5 degrees Celsius, brook trout show significant weight gain. However, as the temperature increases, the amount of weight gained steadily decreases. At the highest temperature measured, 24.4 degrees Celsius, trout experience a net...


