期刊
ENVIRONMENTAL MICROBIOLOGY REPORTS
卷 6, 期 6, 页码 656-664出版社
WILEY
DOI: 10.1111/1758-2229.12183
关键词
-
资金
- National Science Foundation [DGE-1144152, IOS-0958006, OCE-0732369, IOS-1257755]
- University of Connecticut Research Foundation
- Max Planck Society
- DFG Cluster of Excellence 'The Ocean in the Earth System' at MARUM, Bremen
- Division Of Integrative Organismal Systems [0958006] Funding Source: National Science Foundation
Associations between bacteria from the -Proteobacterial order Oceanospirillales and marine invertebrates are quite common. Members of the Oceanospirillales exhibit a diversity of interactions with their various hosts, ranging from the catabolism of complex compounds that benefit host growth to attacking and bursting host nuclei. Here, we describe the association between a novel Oceanospirillales phylotype and the hydrothermal vent snail Alviniconcha. Alviniconcha typically harbour chemoautotrophic - or epsilon-Proteobacterial symbionts inside their gill cells. Via fluorescence in situ hybridization and transmission electron microscopy, we observed an Oceanospirillales phylotype (named AOP for AlviniconchaOceanospirillales phylotype') in membrane-bound vacuoles that were separate from the known - or epsilon-Proteobacterial symbionts. Using quantitative polymerase chain reaction, we surveyed 181 Alviniconcha hosting -Proteobacterial symbionts and 102 hosting epsilon-Proteobacterial symbionts, and found that the population size of AOP was always minor relative to the canonical symbionts (median 0.53% of the total quantified 16S rRNA genes). Additionally, we detected AOP more frequently in Alviniconcha hosting -Proteobacterial symbionts than in those hosting epsilon-Proteobacterial symbionts (96% and 5% of individuals respectively). The high incidence of AOP in -Proteobacteria hosting Alviniconcha implies that it could play a significant ecological role either as a host parasite or as an additional symbiont with unknown physiological capacities.
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