Thermal tolerance of turbot based on cardiac performance and analysis of molecular regulatory mechanisms
文献类型： 外文期刊
作者： Jiang, Yuhang 1 ; Huang, Zhihui 1 ; Ma, Aijun 1 ; Cao, Junwen 1 ; Zhang, Hao 1 ; Zhao, Yinuo 1 ; Hu, Yan 1 ; Liu, Ming 4 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, China ASEAN Belt & Rd Joint Lab Mariculture Techno, 106 Nanjing Rd, Qingdao 266071, Shandong, Peoples R China
2.Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China
3.Qingdao Marine Sci & Technol Ctr, Lab Marine Biol & Biotechnol, Qingdao 266104, Peoples R China
4.Shandong Kehe Marine High Technol Co Ltd, Weihai 264513, Peoples R China
关键词：
期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.5； 五年影响因子：3.1 ）
ISSN： 0920-1742
年卷期： 2025 年 51 卷 3 期
页码：
收录情况： SCI
摘要： The heart is an important factor affecting the upper limit of thermal tolerance in fish, and plays a major role in their physiological plasticity and acclimation to different thermal conditions. Turbot (Scophthalmus maximus (L.)) is a cold-water marine fish, and in our previous studies, selecting a high-temperature resistant strain (HR) which increased the upper limit of high-temperature tolerance by more than 2 degrees C. The study evaluated the difference of the thermal tolerance between the high-temperature resistant strain (HR) and general group (GG) by using Arrhenius break temperatures (ABT). The ABT between them showed a significant difference that suggested different levels of thermal resistance. The result was consistent with assessments of upper thermal tolerance, as well as the activity of creatine kinase and lactate dehydrogenase. Meanwhile, the key genes regulating cardiac performance were analyzed in molecular level. Quantitative real-time PCR results demonstrated that the RNA expression of beta-ARs in the heart at increasing temperature followed an upward trend. However, the expression of mmp2, timp2, fosa, and pcna genes in the heart decreased. Additionally, western blot results demonstrated that the levels of beta 1-AR and beta 3-AR protein expression steadily increased. Overall, in response to acute thermal stress, the primary effector genes in the beta-AR signalling pathway were beta-ARs. Our study identified an effective and accurate measurement for evaluating the turbot's thermal tolerance and initially explored the molecular mechanisms that regulate cardiac performance under thermal stress. These would be greatly beneficial in aquaculture and breeding projects of turbot.
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