Microbial community transcriptomes reveal microbes and metabolic pathways associated with dissolved organic matter turnover in the sea.

ABSTRACT: Marine dissolved organic matter (DOM) contains as much carbon as the Earth's atmosphere, and represents a critical component of the global carbon cycle. To better define microbial processes and activities associated with marine DOM cycling, we analyzed genomic and transcriptional responses of microbial communities to high-molecular-weight DOM (HMWDOM) addition. The cell density in the unamended control remained constant, with very few transcript categories exhibiting significant differences over time. In contrast, the DOM-amended microcosm doubled in cell numbers over 27 h, and a variety of HMWDOM-stimulated transcripts from different taxa were observed at all time points measured relative to the control. Transcripts significantly enriched in the HMWDOM treatment included those associated

SUBMITTER: McCarren J 

PROVIDER: S-EPMC2944720 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature