Marine sequestration of carbon in bacterial metabolites.

Abstract:

:Linking microbial metabolomics and carbon sequestration in the ocean via refractory organic molecules has been hampered by the chemical complexity of dissolved organic matter (DOM). Here, using bioassay experiments and ultra-high resolution metabolic profiling, we demonstrate that marine bacteria rapidly utilize simple organic molecules and produce exometabolites of remarkable molecular and structural diversity. Bacterial DOM is similar in chemical composition and structural complexity to naturally occurring DOM in sea water. An appreciable fraction of bacterial DOM has molecular and structural properties that are consistent with those of refractory molecules in the ocean, indicating a dominant role for bacteria in shaping the refractory nature of marine DOM. The rapid production of chemically complex and persistent molecules from simple biochemicals demonstrates a positive feedback between primary production and refractory DOM formation. It appears that carbon sequestration in diverse and structurally complex dissolved molecules that persist in the environment is largely driven by bacteria.

journal_name

Nat Commun

journal_title

Nature communications

authors

Lechtenfeld OJ,Hertkorn N,Shen Y,Witt M,Benner R

doi

10.1038/ncomms7711

subject

Has Abstract

pub_date

2015-03-31 00:00:00

pages

6711

issn

2041-1723

pii

ncomms7711

journal_volume

6

pub_type

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