한빛사 논문
Abstract
Young Hwan Leea, Hye-Min Kanga, Min-Sub Kima, Minghua Wangb, Jeong Ha Kima, Chang-Bum Jeonga,*, Jae-Seong Leea,*
a Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea
b Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems/College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
*Corresponding authors : Chang-Bum Jeong, Jae-Seong Lee
Abstract
Ocean acidification (OA) is caused by alteration of global ocean carbon chemistry due to the increased pCO2 in the atmosphere and caused deleterious impacts on the marine ecosystem. Although various detrimental effects of OA were reported in marine organisms, the potential impact of OA on aquatic invertebrates still remains largely unknown. Here, we examined changes in life parameters and antioxidant system in response to low pH (7.5 and 7) in the marine copepod Tigriopus japonicus. Exposures to lower pHs (pH 7.5 and 7.0) of copepods resulted in lengthening of the developmental time with decreased fecundity and body length. Also, they showed increased reactive oxygen species contents with enhanced glutathione S-transferase and glutathione reductase activities but decreased glutathione peroxidase and superoxide dismutase activities in pH-dependent manner, indicating that OA exposure caused disturbance of the redox system in T. japonicus. Among several oxidative stress-related genes, GSTs2b was significantly up-regulated in response to OA. These findings will be helpful for a better understanding on the potential impact of OA on life parameters and antioxidant system in the marine copepod T. japonicus.
Keywords : Low pH seawater; oxidative stress; antioxidant response; marine invertebrate
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