@article {ISI:000345702700014,
	title = {{Intracellular Oceanospirillales inhabit the gills of the hydrothermal vent snail Alviniconcha with chemosynthetic, gamma-Proteobacterial symbionts}},
	journal = {ENVIRONMENTAL MICROBIOLOGY REPORTS},
	volume = {6},
	number = {6},
	year = {2014},
	month = {dec},
	pages = {656{\textendash}664},
	type = {Article},
	abstract = {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{\textquoteright}) 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.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {1758-2229},
	doi = {10.1111/1758-2229.12183},
	author = {Beinart, R A and Nyholm, S V and Dubilier, N and Girguis, P R}
}
@article {Kellermann2012,
	title = {{Symbiont{\textendash}host relationships in chemosynthetic mussels: A comprehensive lipid biomarker study}},
	journal = {Organic Geochemistry},
	volume = {43},
	year = {2012},
	pages = {112{\textendash}124},
	abstract = {Symbiosis with chemosynthetic microorganisms allows invertebrates from hydrothermal vents and cold seeps, such as mussels, snails and tubeworms, to gain nutrition independently of organic input from photosynthetic communities. Lipid biomarkers and their compound specific stable carbon isotopes ($δ$13C) have greatly aided the elucidation of chemosynthetic symbiosis. Due to recent methodological advances in liquid chromatography it is now possible to obtain a more holistic view of lipid biomarkers, including the analysis of intact polar membrane lipids (IPLs) and bacteriohopanepolyols (BHPs). This study provides an extensive examination of polar and apolar lipids in combination with stable carbon isotope analysis of three Bathymodiolus mussels (Bathymodiolus childressi, Bathymodiolus cf. thermophilus, Bathymodiolus brooksi) hosting different types of bacterial symbiont (methane-oxidizing, sulfur-oxidizing and a dual symbiosis with methane- and sulfur-oxidizing symbionts, respectively). We propose that IPLs with C16:1 acyl side chains, and phosphatidylglycerol (PG), diphosphatidylglycerol (DPG) and phosphatidylethanolamine (PE) head groups, which were only detected in the gill tissue, can be used as symbiont-characteristic biomarkers. These putative symbiont-specific IPLs provide the opportunity to detect and quantify the methanotrophic and thiotrophic symbionts within the gill tissue. Additional characteristic markers for methanotrophic symbionts were found in B. childressi and B. brooksi, including the BHP derivatives aminotriol and aminotetrol, 4-methyl sterols and diagnostic fatty acids (FAs), such as C16:1${\o}mega$9, C16:1${\o}mega$8, and C18:1${\o}mega$8. In general, the $δ$13C values of FAs, alcohols and BHP-derived hopanols were in accordance with carbon assimilation pathways of the respective methanotrophic or thiotrophic symbionts in all three Bathymodiolus mussels. Differences in BHP distribution as well as $δ$13C values in the two mussels hosting a methanotrophic symbiont may indicate the presence of different methanotrophic symbionts and/or changes in the nutritional status. In all three mussel species the $δ$13C values of lipid biomarkers assigned to the symbionts were similar to those of the hosts, indicating the importance of the bacterial symbionts as the main carbon source for the mussel tissue.},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0146-6380},
	doi = {10.1016/j.orggeochem.2011.10.005},
	url = {http://dx.doi.org/10.1016/j.orggeochem.2011.10.005},
	author = {Kellermann, M Y and Schubotz, F and Elvert, M and Lipp, J S and Birgel, D and Prieto-Mollar, X and Dubilier, N and Hinrichs, K -U}
}
@inbook {Baker2010,
	title = {{Biogeography, Ecology and Vulnerability of Chemosynthetic Ecosystems in the Deep Sea}},
	booktitle = {Life in the World{\textquoteright}s Oceans: Diversity, Distribution, and Abundance},
	year = {2010},
	pages = {161{\textendash}182},
	publisher = {Wiley-Blackwell},
	organization = {Wiley-Blackwell},
	author = {Baker, M C and Ramirez-Llodra, E and Tyler, P A and German, C R and Boetius, A and Cordes, E E and Dubilier, N and Fisher, C R and Levin, L A and Metaxas, A and Rowden, R and Santos, R S and Shank, R and Van Dover, C L and Young, C and Waren, A}
}
@article {Duperron2007,
	title = {{Diversity, relative abundance and metabolic potential of bacterial endosymbionts in three Bathymodiolus mussel species from cold seeps in the Gulf of Mexico}},
	journal = {Environmental microbiology},
	volume = {9},
	number = {6},
	year = {2007},
	month = {jun},
	pages = {1423{\textendash}1438},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {1462-2912},
	doi = {10.1111/j.1462-2920.2007.01259.x},
	author = {Duperron, S and Sibuet, M and MacGregor, B J and Kuypers, M M M and Fisher, C R and Dubilier, N}
}
