Response of rice flower carp (Cyprinus carpio var.) to high-temperature stress: Mechanisms and limits of tolerance

IF 2.9 2区 生物学 Q2 BIOLOGY
Chunxing Cheng , Wenfei Tian , Jinyou Wei , Linli Li , Haizhen Tan , Zhengjun Wu , Jiaoyun Jiang
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Abstract

Climate change presents a considerable challenge to the sustainable development of aquaculture. Research on the impact of high-temperature stress on rice flower carp (Cyprinus carpio var.) is still limited. In this study, rice flower carp (Cyprinus carpio var.) were exposed to four temperature treatments for 14 days: CK (control, 26 °C), TL (low temperature, 28 °C), TM (medium temperature, 30 °C), and TH (high temperature, 32 °C). The findings revealed that high temperatures significantly influenced the diversity of gut microbiota. Moreover, high-temperature stress disrupted the structural integrity of intestinal and liver tissues, causing notable damage. It also impaired the antioxidant system, leading to the accumulation of malondialdehyde (MDA) and inducing oxidative stress. At the transcriptional level, differentially expressed genes (DEGs) associated with the protein processing pathway (e.g., HSP40, HSP70, Bip) and the PPAR (peroxisome proliferator-activated receptor) signaling pathway (e.g., PPARδ, CPT1) were significantly upregulated during temperature acclimation. However, further temperature increases inhibited their expression, highlighting their crucial roles in the high-temperature acclimation of rice flower carp. In conclusion, rice flower carp displayed a degree of tolerance to temperatures up to 30 °C. Beyond this threshold, their health and physiological functions were adversely affected. Our study provides a valuable reference for understanding the impact of high-temperature stress on aquatic animals.
稻花鲤对高温胁迫的响应:机制和耐受极限
气候变化对水产养殖的可持续发展提出了相当大的挑战。高温胁迫对稻花鲤(Cyprinus carpio var.)影响的研究仍然有限。本研究以稻花鲤(Cyprinus carpio var.)为研究对象,分别在CK(对照,26°C)、TL(低温,28°C)、TM(中温,30°C)和TH(高温,32°C) 4种温度处理下处理14 d。研究结果表明,高温显著影响肠道微生物群的多样性。此外,高温应力破坏了肠道和肝脏组织的结构完整性,造成了明显的损伤。它还损害了抗氧化系统,导致丙二醛(MDA)的积累并诱导氧化应激。在转录水平上,与蛋白质加工途径(如HSP40、HSP70、Bip)和PPAR(过氧化物酶体增殖物激活受体)信号通路(如PPARδ、CPT1)相关的差异表达基因(DEGs)在温度驯化过程中显著上调。然而,进一步的温度升高抑制了它们的表达,突出了它们在水稻花鲤高温驯化中的重要作用。综上所述,稻花鲤对高达30℃的温度表现出一定程度的耐受性。超过这个阈值,他们的健康和生理功能就会受到不利影响。本研究为了解高温胁迫对水生动物的影响提供了有价值的参考。
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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