光周期的季节性变化:对大西洋鱼的生长和还氧化信号模式的影响
Peng Yin1,2, Takaya Saito1, Per Gunnar Fjelldal3
1Institute of Marine Research, 5817 Bergen, Norway.
Antioxidants (Basel, Switzerland)
|August 26, 2023
概括
光周期的变化,而不是温度,推动了大西洋鱼的抗氧化剂耗尽和生长. 这项研究揭示了鱼类如何使用氧化还原信号来响应日长等环境线索.
科学领域:
- 水生生理学 水生生理学
- 环境生物学环境生物学
- 鱼类水产养殖 鱼类水产养殖
背景情况:
- 养殖的大西洋鱼在春季显示抗氧化剂消耗增加,但驱动因素 (光周期,温度) 尚不清楚.
- 理解这些驱动因素对于优化水产养殖条件和鱼类健康至关重要.
研究的目的:
- 为了研究模拟自然光周期对大西洋鱼在恒温下氧化还原过程的特定影响.
- 为了确定光周期是否能单独影响抗氧化状态,氧化应激标志物和鱼的生长.
主要方法:
- 大西洋鱼在室内养了6个月,模拟了在恒定9°C的自然光周期变化.
- 分析了组织的抗氧化剂水平,作为脂质过氧化标记的麦隆地 (MDA),以及抗氧化酶活性.
- 检查的基因表达特征与氧化回归稳定,氧化应激 (Nrf2通路),生长激素信号和细胞循环调节有关.
主要成果:
- 日长的增加导致细胞内抗氧化剂耗尽,肝脏和肌肉中MDA水平增加.
- 光周期影响了抗氧化酶活性和基因表达,并对大脑中的氧化还原稳定基因 (例如氧化) 的上调.
- 在肌肉和肝脏中观察到核因素-红素2相关因子2 (Nrf2) 介导的氧化应激反应,与生长和细胞循环调节有关.
结论:
- 无论温度如何,光周期的变化足以改变组织的氧化状态,并在春季和夏季初刺激大西洋鱼的生长.
- 大西洋鱼通过氧化还原信号通道整合环境光周期信号,表明氧化状态和生理功能 (如生长) 之间的联系.
更多相关视频
06:20Author Spotlight: Optimizing Growth Factors for Production of Biotechnologically Relevant Secondary Metabolites
Published on: October 25, 2024
2.3K
04:54Assessing Mineral Availability in Fish Feeds using Complementary Methods Demonstrated with the Example of Zinc in Atlantic Salmon
Published on: October 29, 2021
3.1K
相关概念视频
Biological Clocks and Seasonal Responses
34.7K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.7K
Photoreceptors and Plant Responses to Light
20.5K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.5K
Osmoregulation in Fishes
49.9K
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
49.9K
Background and Environment Affect Phenotype
6.6K
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...
6.6K
Responses to Salt Stress
13.2K
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.
13.2K
Testing a Claim about Mean: Known Population SD
2.8K
A complete procedure of testing the hypothesis about a population mean is explained here.
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
2.8K
