PMID- 21734728 OWN - NLM STAT- MEDLINE DCOM- 20120409 LR - 20240323 IS - 1751-7370 (Electronic) IS - 1751-7362 (Print) IS - 1751-7362 (Linking) VI - 6 IP - 1 DP - 2012 Jan TI - Expression patterns of mRNAs for methanotrophy and thiotrophy in symbionts of the hydrothermal vent mussel Bathymodiolus puteoserpentis. PG - 104-12 LID - 10.1038/ismej.2011.81 [doi] AB - The hydrothermal vent mussel Bathymodiolus puteoserpentis (Mytilidae) from the Mid-Atlantic Ridge hosts symbiotic sulfur- and methane-oxidizing bacteria in its gills. In this study, we investigated the activity and distribution of these two symbionts in juvenile mussels from the Logatchev hydrothermal vent field (14 degrees 45'N Mid-Atlantic Ridge). Expression patterns of two key genes for chemosynthesis were examined: pmoA (encoding subunit A of the particulate methane monooxygenase) as an indicator for methanotrophy, and aprA (encoding the subunit A of the dissimilatory adenosine-5'-phosphosulfate reductase) as an indicator for thiotrophy. Using simultaneous fluorescence in situ hybridization (FISH) of rRNA and mRNA we observed highest mRNA FISH signals toward the ciliated epithelium where seawater enters the gills. The levels of mRNA expression differed between individual specimens collected in a single grab from the same sampling site, whereas no obvious differences in symbiont abundance or distribution were observed. We propose that the symbionts respond to the steep temporal and spatial gradients in methane, reduced sulfur compounds and oxygen by modifying gene transcription, whereas changes in symbiont abundance and distribution take much longer than regulation of mRNA expression and may only occur in response to long-term changes in vent fluid geochemistry. FAU - Wendeberg, Annelie AU - Wendeberg A AD - Department of Molecular Ecology, Celsiusstr, Max Planck Institute for Marine Microbiology, Bremen, Germany. annelie.pernthaler@ufz.de FAU - Zielinski, Frank U AU - Zielinski FU FAU - Borowski, Christian AU - Borowski C FAU - Dubilier, Nicole AU - Dubilier N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110707 PL - England TA - ISME J JT - The ISME journal JID - 101301086 RN - 0 (RNA, Bacterial) RN - 0 (RNA, Messenger) RN - 0 (RNA, Ribosomal) RN - 0 (Sulfides) RN - OP0UW79H66 (Methane) RN - S88TT14065 (Oxygen) SB - IM MH - Animals MH - Gills/microbiology MH - Hydrothermal Vents/*microbiology MH - In Situ Hybridization, Fluorescence MH - Methane/metabolism MH - Methylococcaceae/*genetics/*metabolism MH - Mytilidae/*microbiology/physiology MH - Oxygen/metabolism MH - RNA Stability MH - RNA, Bacterial/analysis MH - RNA, Messenger/analysis MH - RNA, Ribosomal/analysis MH - Seawater/microbiology MH - Sulfides/metabolism MH - Symbiosis MH - Thiobacillus/genetics/metabolism PMC - PMC3246237 EDAT- 2011/07/08 06:00 MHDA- 2012/04/10 06:00 PMCR- 2013/01/01 CRDT- 2011/07/08 06:00 PHST- 2011/07/08 06:00 [entrez] PHST- 2011/07/08 06:00 [pubmed] PHST- 2012/04/10 06:00 [medline] PHST- 2013/01/01 00:00 [pmc-release] AID - ismej201181 [pii] AID - 10.1038/ismej.2011.81 [doi] PST - ppublish SO - ISME J. 2012 Jan;6(1):104-12. doi: 10.1038/ismej.2011.81. Epub 2011 Jul 7.