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    Release of ecologically relevant metabolites by the cyanobacterium Synechococcus elongatus CCMP 1631

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    Author's manuscript (409.3Kb)
    Supplementary material (476.3Kb)
    Date
    2015-04-30
    Author
    Fiore, Cara L.  Concept link
    Longnecker, Krista  Concept link
    Kido Soule, Melissa C.  Concept link
    Kujawinski, Elizabeth B.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/7629
    As published
    https://doi.org/10.1111/1462-2920.12899
    Abstract
    Photoautotrophic plankton in the surface ocean release organic compounds that fuel secondary production by heterotrophic bacteria. Here we show that an abundant marine cyanobacterium, Synechococcus elongatus, contributes a variety of nitrogen-rich and sulfur-containing compounds to dissolved organic matter. A combination of targeted and untargeted metabolomics and genomic tools was used to characterize the intracellular and extracellular metabolites of S. elongatus. Aromatic compounds such as 4-hydroxybenzoic acid and phenylalanine, as well as nucleosides (e.g., thymidine, 5’-methylthioadenosine, xanthosine), the organosulfur compound 3-mercaptopropionate, and the plant auxin indole 3-acetic acid, were released by S. elongatus at multiple time points during its growth. Further, the amino acid kynurenine was found to accumulate in the media even though it was not present in the predicted metabolome of S. elongatus. This indicates that some metabolites, including those not predicted by an organism’s genome, are likely excreted into the environment as waste; however, these molecules may have broader ecological relevance if they are labile to nearby microbes. The compounds described herein provide excellent targets for quantitative analysis in field settings to assess the source and lability of dissolved organic matter in situ.
    Description
    Author Posting. © The Author(s), 2015. This is the author's version of the work. It is posted here by permission of Society for Applied Microbiology for personal use, not for redistribution. The definitive version was published in Environmental Microbiology 17 (2015): 3949–3963, doi:10.1111/1462-2920.12899.
    Collections
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Preprint: Fiore, Cara L., Longnecker, Krista, Kido Soule, Melissa C., Kujawinski, Elizabeth B., "Release of ecologically relevant metabolites by the cyanobacterium Synechococcus elongatus CCMP 1631", 2015-04-30, https://doi.org/10.1111/1462-2920.12899, https://hdl.handle.net/1912/7629
     
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