Seawater acidification affects the immune enzyme activities of the Manila clam <i>Ruditapes philippinarum</i> -- Journal of Oceanology and Limnology,2018,36(5):1688-1696

	Cite this paper:
	HUO Zhongming, MENG Xiangyu, Md. Golam RBBANI, CAO Weinan, WU Qidi, LI Ying, WANG Jingtian, YUAN Hongmei, YANG Feng, YAN Xiwu. Seawater acidification affects the immune enzyme activities of the Manila clam Ruditapes philippinarum[J]. Journal of Oceanology and Limnology, 2018, 36(5): 1688-1696

Seawater acidification affects the immune enzyme activities of the Manila clam Ruditapes philippinarum

HUO Zhongming, MENG Xiangyu, Md. Golam RBBANI, CAO Weinan, WU Qidi, LI Ying, WANG Jingtian, YUAN Hongmei, YANG Feng, YAN Xiwu

Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China

Abstract:

Ocean acidification leads to changes in physiological and immune responses of bivalves, but the effect on the immune enzyme activities of the Manila clam, Ruditapes philippinarum, when the pH is lower than the normal value has not been studied in detail. In this study, experiments were conducted to determine how pH (7.4, 7.7, 8.0) affects the immune enzyme activities in the gill and hemocytes of the Manila clam. Membrane stability and phagocytosis increased with decrease of pH from 8.0 to 7.7 and then decreased at pH 7.4. The total protein content in the hemocytes and gills decreased with decreasing pH. Lysozyme content in the hemocytes increased with decreasing pH, and the differences were significant among the different pH groups (P<0.05). Adenosine triphosphatase activity at pH 7.4 was significantly higher than in the other two groups, but no significant difference was observed between pH 7.7 and 8.0. Catalase activity decreased from pH 8.0 to 7.7 and then increased at pH 7.4, and the differences were significant among the experimental groups (P<0.05). These findings provide valuable information about the immune response of R. philippinarum to reduced water pH and insights for future research investigating exposure of bivalves to elevated CO₂ conditions.

Key words: seawater acidification|immune enzyme|Ruditapes philippinarum

Received: 2017-07-01 Revised:

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Articles by HUO Zhongming

Articles by MENG Xiangyu

Articles by Md. Golam RBBANI

Articles by CAO Weinan

Articles by WU Qidi

Articles by LI Ying

Articles by WANG Jingtian

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Articles by YANG Feng

Articles by YAN Xiwu

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