在盐度应激下草鱼的生存和急性度调节反应
Zhu Zhu1, Shengjie Li2, Caixia Lei2
1Pearl River Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, China Ministry of Agriculture, Guangzhou 510380, China; College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.
概括
草可以在高达10.58 ppt的盐度下生存. 这项研究揭示了草 (Ctenopharyngodon idella) 对高盐环境的关键生理和遗传适应,为盐水水产养殖铺平了道路.
科学领域:
- 水产养殖科学 水产养殖科学
- 鱼类生理学 鱼类生理学
- 环境适应 环境适应
背景情况:
- 内陆盐水对水产养殖来说是个挑战,因为透压力很高.
- 草 (Ctenopharyngodon idella) 是一种全球养殖的淡水鱼,仅限于淡水息地.
- 了解草在高度条件下的透调节机制对于扩大水产养殖至关重要.
研究的目的:
- 为了确定幼草鱼的急性盐分耐受性.
- 为了研究对高盐水压力的生理和生化反应.
- 分析度响应基因的表达,这些基因参与了透调节.
主要方法:
- 在六个梯度 (0-16 ppt) 上进行急性盐度耐受性测试.
- 确定96小时中位数致命盐度度 (LC50-96h).
- 在盐度压力下进行生理生化分析和基因表达分析 (NKA,SLC12A2).
主要成果:
- 草的LC50-96h被确定为10.58个百分比.
- 盐分压力增加了血清电解质,皮质醇,改变了度和益生素水平.
- 观察到抗氧化酶 (SOD,GSH-Px),离子运输基因 (NKA,SLC12A2) 的升级,以及/脏的显著结构变化.
结论:
- 草对高盐水环境表现出适应性反应,包括增强的离子运输和抗氧化剂防御.
- 这项研究确定了关键基因 (NKA,SLC12A2),这些基因参与了草的透调节.
- 这些发现为开发盐水养殖技术和耐盐草品种提供了理论基础.
更多相关视频
相关概念视频
Responses to Salt Stress
13.4K
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.
13.4K
Osmoregulation in Fishes
50.5K
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?
50.5K
Responses to Drought and Flooding
11.0K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.0K
Adaptations that Reduce Water Loss
26.3K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
26.3K
Tonicity in Animals
119.2K
The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
119.2K
Responses to Heat and Cold Stress
13.9K
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.
13.9K


