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代际可塑性对循环高温和缺氧影响斑马鱼后代的应激反应和耐受性

Michael Y-T Lim¹, Nicholas J Bernier¹

¹Department of Integrative Biology, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada.

The Journal of experimental biology

|July 27, 2023

概括

在斑马鱼中,父母暴露于热量和缺氧压力的组合改善了后代的热耐受性,但没有缺氧耐受性,这表明对压力弹性有复杂的代际影响.

科学领域:

环境毒理学环境毒理学
水生生态毒理学水生生态毒理学
气候变化生物学

背景情况:

预计气候变化将增加热浪和缺氧.
这些压力因素深深地影响鱼类,但非遗传性遗传缓冲能力尚不清楚.

研究的目的:

为了测试长时间暴露在热应激和缺氧中对成年斑马鱼如何影响后代.
为了评估父母的投资,幼虫的应激反应,以及父母和后代的耐受性.

主要方法:

成年斑马鱼被暴露在热应力和缺氧的联合diele循环中.
评估后代的生存,发育,父母的投资 (皮质醇,HSPs),幼虫的应激反应和耐受性.

主要成果:

父母暴露增加了死亡率,减少了胚胎大小,并延迟了化.
母体皮质醇降低,而胚胎热冲击蛋白 (HSP) 水平增加.
幼虫后代表现出改变的应激反应和增加的热耐受性,但没有低氧耐受性.

结论:

代际适应组合的压力因素引起的复杂的承载效应应激应反应.
这些影响对鱼类对气候变化的抵抗力有潜在影响.

关键词:

皮质醇是一种皮质醇.环境压力因素环境压力因素热冲击蛋白质是一种热冲击蛋白质.低氧耐药性抗氧耐药性非遗传性遗传是一种非遗传性遗传.热耐受性热耐受性

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