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Short-Term Exposure of Mytilus coruscus to Decreased pH and Salinity Change Impacts Immune Parameters of Their Haemocytes

Journal article
Authors F. L. Wu
Z. Xie
Y. W. Lan
Samuel Dupont
M. Sun
S. K. Cui
X. Z. Huang
W. Huang
L. P. Liu
M. H. Hu
W. Q. Lu
Y. J. Wang
Published in Frontiers in Physiology
Volume 9
Pages 1-11
ISSN 1664-042X
Publication year 2018
Published at The Sven Lovén Centre for Marine Sciences
Pages 1-11
Language en
Keywords acidification, salinity, Mytilus coruscus, flow cytometry, immune response, haemocyte, mussel perna-viridis, clam chamelea-gallina, haliotis-diversicolor-supertexta, crassostrea-gigas thunberg, flow-cytometric analysis, ocean acidification, pacific oyster, seawater, acidification, heart-rate, in-vitro, Physiology
Subject categories Geochemistry, Marine ecology, Other Biological Topics


With the release of large amounts of CO2, ocean acidification is intensifying and affecting aquatic organisms. In addition, salinity also plays an important role for marine organisms and fluctuates greatly in estuarine and coastal ecosystem, where ocean acidification frequently occurs. In present study, flow cytometry was used to investigate immune parameters of haemocytes in the thick shellmusselMytilus coruscus exposed to different salinities (15, 25, and 35 parts per thousand) and two pH levels (7.3 and 8.1). A 7-day in vivo and a 5-h in vitro experiments were performed. In both experiments, low pH had significant effects on all tested immune parameters. When exposed to decreased pH, total haemocyte count (THC), phagocytosis (Pha), esterase (Est), and lysosomal content (Lyso) were significantly decreased, whereas haemocyte mortality (HM) and reactive oxygen species (ROS) were increased. High salinity had no significant effects on the immune parameters of haemocytes as compared with low salinity. However, an interaction between pH and salinity was observed in both experiments for most tested haemocyte parameters. This study showed that high salinity, low salinity and low pH have negative and interactive effects on haemocytes of mussels. As a consequence, it can be expected that the combined effect of low pH and changed salinity will have more severe effects on mussel health than predicted by single exposure.

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Utskriftsdatum: 2019-09-23