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Ocean acidification and host-pathogen interactions: blue mussels, Mytilus edulis, encountering Vibrio tubiashii

Artikel i vetenskaplig tidskrift
Författare Maria. E. Asplund
Susanne P. Baden
Sarah Russ
Robert P. Ellis
Ningping Gong
Bodil Hernroth
Publicerad i Environmental Microbiology
Volym 16
Nummer/häfte 4
Sidor 1029-1039
ISSN 1462-2912
Publiceringsår 2014
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 1029-1039
Språk en
Länkar dx.doi.org/10.1111/1462-2920.12307
https://gup.ub.gu.se/file/127171
Ämnesord Host-pathogen interaction, Ocean acidification, Pathogen success
Ämneskategorier Biologiska vetenskaper

Sammanfattning

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.

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