Ocean acidification and host-pathogen interactions: blue mussels, Mytilus edulis, encountering Vibrio tubiashii
Ocean acidification and host-pathogen interactions: blue mussels, Mytilus edulis, encountering Vibrio tubiashii
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DOI：
10.1111/1462-2920.12307
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发表时间：
2014-04-01
影响因子：
5.1
通讯作者：
Hernroth, Bodil E.
中科院分区：
文献类型：
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作者：
Asplund, Maria E.;Baden, Susanne P.;Hernroth, Bodil E.
海洋酸化可以改变相互作用的生物之间的生态平衡。在这项研究中，我们已经使用了一个模型系统来说明之间的相互作用的钙化宿主生物体，蓝贻贝贻贝和一个共同的双壳类细菌病原体，弧菌tubiashii，与生物体被暴露于酸化的水平，预计到21世纪末发生。在相对长期（4个月）和短期（4天）实验中对贻贝进行了OA暴露。我们发现OA对管氏弧菌在肉汤或海水中的可培养性没有影响。OA抑制贻贝壳的生长和受损的结晶壳结构，但没有出现影响贻贝的免疫参数（即血细胞计数和吞噬能力）。尽管对宿主免疫力或病原体的生长和毒力没有明显影响，但与环境条件下维持的贻贝相比，管氏弧菌在感染长期暴露于OA的贻贝方面显然更成功。此外，当暴露于OA处理的贻贝的血细胞时，暴露于OA的管氏弧菌增加了它们的活力。我们的研究结果表明，即使宿主生物体可能有能力科普OA时期，这些条件可能会改变宿主-病原体相互作用的结果，有利于后者的成功。
Ocean acidification (OA) can shift the ecological balance between interacting organisms. In this study, we have used a model system to illustrate the interaction between a calcifying host organism, the blue mussel Mytilus edulis and a common bivalve bacterial pathogen, Vibrio tubiashii, with organisms being exposed to a level of acidification projected to occur by the end of the 21st century. OA exposures of the mussels were carried out in relative long-term (4 months) and short-term (4 days) experiments. We found no effect of OA on the culturability of V. tubiashii, in broth or in seawater. OA inhibited mussel shell growth and impaired crystalline shell structures but did not appear to affect mussel immune parameters (i.e haemocyte counts and phagocytotic capacity). Despite no evident impact on host immunity or growth and virulence of the pathogen, V. tubiashii was clearly more successful in infecting mussels exposed to long-term OA compared to those maintained under ambient conditions. Moreover, OA exposed V. tubiashii increased their viability when exposed to haemocytes of OA-treated mussel. Our findings suggest that even though host organisms may have the capacity to cope with periods of OA, these conditions may alter the outcome of host-pathogen interactions, favouring the success of the latter.