气候变化领域集成服务门户(CCPortal): The acute and chronic low-temperature stress responses in Porites lutea from a relatively high-latitude coral reef of the South China Sea

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DOI	10.3389/fmars.2024.1321865
	The acute and chronic low-temperature stress responses in Porites lutea from a relatively high-latitude coral reef of the South China Sea
	Wei, Xuelu; Yu, Kefu; Qin, Zhenjun; Chen, Shuchang; Pan, Nengbin; Lan, Mengling
发表日期	2024
EISSN	2296-7745
起始页码	11
卷号	11
英文摘要	Relatively high-latitude coral reefs could be potential refuges for corals under climate change. One of the most important aspects limiting their availability as refuges is low-temperature stress. However, the mechanisms underlying the response of coral holobionts to low-temperature stress is unclear. In this study, we aimed to explore the underlying mechanisms by recording the maximum quantum yields of photosystem II (Fv/Fm) and transcriptome responses of Porites lutea under acute (1-2 weeks) and chronic (6-12 weeks) low-temperature stress at 20 degrees C and 14 degrees C. The P. lutea samples were collected from a relatively high-latitude coral reef in the South China Sea (109 degrees 00 '-109 degrees 15 ' E and 21 degrees 00 '-21 degrees 10 ' N). The study suggested that: (1) Under acute low-temperature stress, the Fv/Fm of Symbiodiniaceae dropped by 64%, which was significantly higher than the 49% observed under chronic stress. Low-temperature stress inhibited photosystem II(PSII) functioning, with greater inhibition under acute stress. (2) Downregulation of sugar metabolism-related genes under low-temperature stress implied that the decrease in energy was due to obstruction of PSII. (3) Under low-temperature stress, calcification-related genes were downregulated in coral hosts, possibly because of energy deprivation caused by inhibited photosynthesis, Symbiodiniaceae expulsion, and oxidative phosphorylation uncoupling in mitochondria. (4) Acute low-temperature stress induced the upregulation of genes related to the TNF signaling pathway and endoplasmic reticulum stress, promoting apoptosis and coral bleaching. However, these phenomena were not observed during chronic stress, suggesting acclimation to chronic low-temperature stress and a greater survival pressure of acute low-temperature stress on coral holobionts. In conclusion, low-temperature stress inhibits Symbiodiniaceae PSII functioning, reducing energy production and affecting calcification in coral holobionts. Acute low-temperature stress is more threatening to coral holobionts than chronic stress.
英文关键词	relatively high-latitude coral reef; low-temperature stress; coral holobionts; Fv/Fm; apoptosis
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:001174705800001
来源期刊	FRONTIERS IN MARINE SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304634
作者单位	Guangxi University; Southern Marine Science & Engineering Guangdong Laboratory; Southern Marine Science & Engineering Guangdong Laboratory (Guangzhou)
推荐引用方式 GB/T 7714	Wei, Xuelu,Yu, Kefu,Qin, Zhenjun,et al. The acute and chronic low-temperature stress responses in Porites lutea from a relatively high-latitude coral reef of the South China Sea[J],2024,11.
APA	Wei, Xuelu,Yu, Kefu,Qin, Zhenjun,Chen, Shuchang,Pan, Nengbin,&Lan, Mengling.(2024).The acute and chronic low-temperature stress responses in Porites lutea from a relatively high-latitude coral reef of the South China Sea.FRONTIERS IN MARINE SCIENCE,11.
MLA	Wei, Xuelu,et al."The acute and chronic low-temperature stress responses in Porites lutea from a relatively high-latitude coral reef of the South China Sea".FRONTIERS IN MARINE SCIENCE 11(2024).