三胞胎太平洋在热浪后表现出应激反应失调和死亡率升高
Matthew N George1,2, Olivia Cattau1, Mollie A Middleton2,3
1School of Aquatic & Fishery Sciences, University of Washington, Seattle, Washington, USA.
Global change biology
|July 19, 2023
概括
与双胞胎相比,三胞胎太平洋在热浪期间的死亡率和生理压力更高. 这表明多化可以降低海洋水产养殖的气候弹性,影响粮食安全.
科学领域:
- 海洋生物学 海洋生物学
- 基因组学就是基因组学.
- 适应气候变化 适应气候变化
背景情况:
- 假设多重积分会降低环境压力耐受性.
- 太平洋 (Crassostrea gigas) 是一个商业上重要的水产养殖物种.
研究的目的:
- 将双胞胎 (2n) 和三胞胎 (3n) 太平洋的基因组和生理反应与模拟的热浪条件进行比较.
- 评估多性对易受单个和多个气候压力因素的影响.
主要方法:
- 将二倍体和三倍体暴露在海水温度升高 (30°C) 和随后的空气浮出 (44°C) 中.
- 测量的死亡率,生理指标 (Na+/K+ ATPase活性) 和基因表达模式.
- 在性特异性基因组上进行功能丰富分析.
主要成果:
- 三胞胎在热和空气压力相结合的情况下,死亡率明显高 (36.4%),高于双胞胎 (14.8%).
- 三合体动物表现出能量限制的迹象,包括代谢抑郁和酶活性降低.
- 基因表达分析揭示了三重体中应激反应,免疫力,新陈代谢和线粒体功能基因的失调.
结论:
- 三性改变了太平洋中与压力相关的过程的转录调节,降低了它们的生理耐受性极限.
- 多性可能会增加对极端气候事件的易感性,对水产养殖和粮食安全构成风险.
- 在未来的气候场景中,了解鱼特异性反应对于管理海洋水产养殖至关重要.
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