Effects of seawater acidification and cadmium on the antioxidant defense of flounder Paralichthys olivaceus larvae

doi:10.1016/j.scitotenv.2020.137234

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	Effects of seawater acidification and cadmium on the antioxidant defense of flounder Paralichthys olivaceus larvae
	Cui, Wenting 1,3; Cao, Liang 2,3; Liu, Jinhu 2,3; Ren, Zhonghua 1,3; Zhao, Bo 3; Dou, Shuozeng 1,2,3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-05-20
卷号	718 页码:13
关键词	Early life stages Cadmium Seawater acidification Metal accumulation Oxidative stress Marine fish
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.137234
通讯作者	Dou, Shuozeng(szdou@qdio.ac.cn)
英文摘要	Increasing atmospheric carbon dioxide has led to a decrease in the pH of the ocean, which influences the special ion of heavy metals and consequently affects metal toxicity in marine organisms. To investigate the effects of seawater acidification and metals on the antioxidant defenses of marine fishes, the flounder Para, ichthys olivaceus, was continuously exposed to cadmium (Cd; control, 0.01 and 0.15 mg L-1) and acidified seawater (control (pH 8.10), 7.70 and 7.30) for 49 days from embryogenesis to settlement. The results demonstrated that both Cd and acidified seawater could induce oxidative stress and consequently cause lipid peroxidation (LPO) in the larvae. Antioxidants (i.e., superoxide dismutase, SOD; catalase, CAT; reduced glutathione, GSH; glutathione 5-transferase, GST; glutathione peroxidase, GPx; and glutathione reductase, GR) functioned to defend the larvae against oxidative damage. Overall, Cd induced (SOD, GST and GSH) or inhibited (CAT and GPx) the enzymatic activities or contents of all the selected antioxidants except for GR. The antioxidants responded differently to seawater acidification, depending on their interaction with the metal. Similarly, the mRNA expressions of the antioxidant-related genes were upregulated (sod, gr and gst) or downregulated (cat and gpx) in response to increasing Cd exposure. Seawater acidification did not necessarily affect all of the biomarkers; in some cases (eg, SOD and sod, GR and gr), Cd stress may have exceeded and masked the stress from seawater acidification in regulating the antioxidant defense of the larvae. The integrated biomarker response (IBR) was enhanced with increasing levels of the stressors. These findings support the hypothesis that seawater acidification not only directly affects the antioxidant defense in flounder larvae but also interacts with Cd to further regulate this defense. This study has ecological significance for assessing the long-term impacts of ocean acidification and metal pollution on the recruitment of fish populations in the wild. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China (NSFC) under the programs Science Fund for Creative Research Groups[40821004] ; National Natural Science Foundation of China (NSFC) under the programs Science Fund for Creative Research Groups[41121064] ; National Natural Science Foundation of China (NSFC) under the programs Science Fund for Creative Research Groups[41406167]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000526029000044
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/167226]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Dou, Shuozeng
作者单位	1.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Cui, Wenting,Cao, Liang,Liu, Jinhu,et al. Effects of seawater acidification and cadmium on the antioxidant defense of flounder Paralichthys olivaceus larvae[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,718:13.
APA	Cui, Wenting,Cao, Liang,Liu, Jinhu,Ren, Zhonghua,Zhao, Bo,&Dou, Shuozeng.(2020).Effects of seawater acidification and cadmium on the antioxidant defense of flounder Paralichthys olivaceus larvae.SCIENCE OF THE TOTAL ENVIRONMENT,718,13.
MLA	Cui, Wenting,et al."Effects of seawater acidification and cadmium on the antioxidant defense of flounder Paralichthys olivaceus larvae".SCIENCE OF THE TOTAL ENVIRONMENT 718(2020):13.