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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Amin, Shady A. Moran, Mary Ann Van Mooy, Benjamin A. S. Smith, Christa B. Bender, Sara J. Durham, Bryndan P. Luo, Haiwei Dearth, Stephen P. Sharma, Shalabh Campagna, Shawn R. Kujawinski, Elizabeth B. Armbrust, E. Virginia |
| Description | Author Affiliation: Durham BP ( Department of Microbiology, University of Georgia, Athens, GA 30602); Sharma S ( Department of Marine Sciences, University of Georgia, Athens, GA 30602); Luo H ( Department of Marine Sciences, University of Georgia, Athens, GA 30602); Smith CB ( Department of Marine Sciences, University of Georgia, Athens, GA 30602); Amin SA ( School of Oceanography, University of Washington, Seattle, WA 98195); Bender SJ ( Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543); Dearth SP ( Department of Chemistry, University of Tennessee, Knoxville, TN 37996.); Van Mooy BA ( Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543); Campagna SR ( Department of Chemistry, University of Tennessee, Knoxville, TN 37996.); Kujawinski EB ( Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543); Armbrust EV ( School of Oceanography, University of Washington, Seattle, WA 98195); Moran MA ( Department of Marine Sciences, University of Georgia, Athens, GA 30602); |
| Abstract | About half the carbon fixed by phytoplankton in the ocean is taken up and metabolized by marine bacteria, a transfer that is mediated through the seawater dissolved organic carbon (DOC) pool. The chemical complexity of marine DOC, along with a poor understanding of which compounds form the basis of trophic interactions between bacteria and phytoplankton, have impeded efforts to identify key currencies of this carbon cycle link. Here, we used transcriptional patterns in a bacterial-diatom model system based on vitamin B12 auxotrophy as a sensitive assay for metabolite exchange between marine plankton. The most highly up-regulated genes (up to 374-fold) by a marine Roseobacter clade bacterium when cocultured with the diatom Thalassiosira pseudonana were those encoding the transport and catabolism of 2,3-dihydroxypropane-1-sulfonate (DHPS). This compound has no currently recognized role in the marine microbial food web. As the genes for DHPS catabolism have limited distribution among bacterial taxa, T. pseudonana may use this sulfonate for targeted feeding of beneficial associates. Indeed, DHPS was both a major component of the T. pseudonana cytosol and an abundant microbial metabolite in a diatom bloom in the eastern North Pacific Ocean. Moreover, transcript analysis of the North Pacific samples provided evidence of DHPS catabolism by Roseobacter populations. Other such biogeochemically important metabolites may be common in the ocean but difficult to discriminate against the complex chemical background of seawater. Bacterial transformation of this diatom-derived sulfonate represents a previously unidentified and likely sizeable link in both the marine carbon and sulfur cycles. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 112 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2015-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Carbon Cycle Plankton Metabolism Alkanesulfonates Diatoms Genetics Ecosystem Gene Expression Profiling Metabolic Networks And Pathways Models, Biological Phylogeny Phytoplankton Roseobacter Seawater Microbiology Vitamin B 12 Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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