High- and low-temperature stress responses of Porites lutea from the relatively high-latitude region of the South China Sea

IF 3 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Wen Huang , Zhihua Huang , Enguang Yang , Linqing Meng , Jinlian Chen , Ronghua Tan , Zunyong Xiao , Yupeng Zhou , Mingpei Xu , Kefu Yu
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引用次数: 0

Abstract

Global climate change has led to more frequent extreme temperature (extreme heat and cold) events, posing a serious threat to coral reef ecosystems. Higher latitudes are considered potential refuges for reef-building corals, but their response to extreme temperature stress in these regions remain unclear. This study, indoor simulated stress experiments ranging on Porites lutea from Weizhou Island in the northern part of the South China Sea, simulating suitable (26 °C) to extreme high (34 °C) and extreme low (12 °C) temperatures. Physiological, biochemical, and transcriptional responses, were analysed. Results showed P. lutea's tentacles contracted, and symbiotic relationships broke down at both high and low temperatures; leading to oxidative stress, and a higher risk of disease. The coral host's response to temperature stress was positively regulated, mainly through apoptosis and metabolic inhibition pathways, whereas Symbiodiniaceae C15 showed no significant response to either high- or low-temperature stress. The coral host played a dominant role in the holobiont's stress response, using similar mechanisms for both high- and low-temperatures with some differences in the details. This study enhances understanding the temperature response mechanisms of the dominant coral species, P. lutea in the relatively high-latitude regions of the South China Sea.
南海相对高纬度地区黄岩的高低温应力响应
全球气候变化导致极端温度(极热和极冷)事件更加频繁,对珊瑚礁生态系统构成严重威胁。高纬度地区被认为是造礁珊瑚的潜在避难所,但它们对这些地区极端温度压力的反应尚不清楚。本研究对南海北部涠洲岛黄岩进行室内模拟应力实验,模拟适宜温度(26°C)至极高温度(34°C)和极低温度(12°C)。分析了生理、生化和转录反应。结果表明:在高温和低温条件下,黄鳝触手收缩,共生关系破裂;导致氧化应激和更高的疾病风险。珊瑚寄主对温度胁迫的响应主要通过细胞凋亡和代谢抑制途径进行正向调节,而共生二科C15对高温和低温胁迫均无显著响应。珊瑚宿主在全息生物的应激反应中起着主导作用,在高温和低温下使用相似的机制,但在细节上存在一些差异。本研究加深了对南海相对高纬度地区优势珊瑚——黄斑珊瑚的温度响应机制的认识。
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来源期刊
Marine environmental research
Marine environmental research 环境科学-毒理学
CiteScore
5.90
自引率
3.00%
发文量
217
审稿时长
46 days
期刊介绍: Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.
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