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Journal article
Biogeography and environmental genomics of the Roseobacter-affiliated pelagic CHAB-I-5 lineage
Nature microbiology, Vol.1(7), 16063
05/16/2016
PMID: 27572966
Web of Science ID: WOS:000383605700008
Abstract
The identification and functional characterization of microbial communities remains a prevailing topic in microbial oceanography as information on environmentally relevant pelagic prokaryotes is still limited. The Roseobacter group, an abundant lineage of marine Alphaproteobacteria, can constitute large proportions of the bacterioplankton. Roseobacters also occur associated with eukaryotic organisms and possess streamlined as well as larger genomes from 2.2 to >5 Mpb. Here, we show that one pelagic cluster of this group, CHAB-I-5, occurs globally from tropical to polar regions and accounts for up to 22% of the active North Sea bacterioplankton in the summer. The first sequenced genome of a CHAB-I-5 organism comprises 3.6 Mbp and exhibits features of an oligotrophic lifestyle. In a metatranscriptome of North Sea surface waters, 98% of the encoded genes were present, and genes encoding various ABC transporters, glutamate synthase and CO oxidation were particularly upregulated. Phylogenetic gene content analyses of 41 genomes of the Roseobacter group revealed a unique cluster of pelagic organisms distinct from other lineages of this group, highlighting the adaptation to life in nutrient-depleted environments.
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Details
- Title
- Biogeography and environmental genomics of the Roseobacter-affiliated pelagic CHAB-I-5 lineage
- Publication Details
- Nature microbiology, Vol.1(7), 16063
- Resource Type
- Journal article
- Publisher
- Springer Nature
- Number of pages
- 8
- Grant note
- The authors thank J. Orchard, A. Neumann and O. Thomsen for their help in the laboratory, J. Lucas for the water sample from Helgoland and the crews of RV Heincke (grant no. AWI-HE361_00) and RV Polarstern (grant nos. AWI-PS ANT28-2_00, AWI-PS ANT28-4_00 and AWI-PS ANT28-5_00) for their support on board ship. The EAGER 2011 cruise was organized by the Continental Shelf Project of the Kingdom of Denmark and the Galathea 3 expedition was under the auspices of the Danish Expedition Foundation. This work was supported by the Deutsche Forschungsgemeinschaft (DFG) within the Transregional Collaborative Research Centre ‘Roseobacter’ (TRR 51).
- Copyright
- © 2016, Macmillan Publishers Limited
- Identifiers
- WOS:000383605700008; 99380184623606600
- Academic Unit
- Hal Marcus College of Science and Engineering ; Center for Environmental Diagnostics and Bioremediation
- Language
- English