Mapping the Surface Microbiome and Metabolome of Brown Seaweed Fucus vesiculosus by Amplicon Sequencing, Integrated Metabolomics and Imaging Techniques

Parrot, Delphine, Blümel, Martina, Utermann, Caroline, Chianese, Giuseppina, Krause, Stefan, Kovalev, Alexander, Gorb, Stanislav and Tasdemir, Deniz (2019) Mapping the Surface Microbiome and Metabolome of Brown Seaweed Fucus vesiculosus by Amplicon Sequencing, Integrated Metabolomics and Imaging Techniques Scientific Reports, 9 (1061). DOI 10.1038/s41598-018-37914-8.

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Abstract

the brown alga Fucus vesiculosus is a keystone marine species, which is subject to heavy surface colonisation. this study was designed to analyse the surface epibiome of F. vesiculosus in conjunction with the composition and spatial distribution of its surface metabolome. the amplicon sequencing, seM and CARD-FIsH imaging studies showed Alphaproteobacteria to predominate the epibiotic bacteria. Fungi of the class Eurotiomycetes were visualised for the first time on an algal surface. An untargeted metabolomics approach using molecular networks, in silico prediction and manual dereplication showed the differential metabolome of the surface and the whole tissue extracts. In total, 50 compounds were putatively dereplicated by UPLC-MS/MS, 37 of which were previously reported from both seaweeds and microorganisms. Untargeted spatial metabolomics by DESI-Imaging MS identified the specific localisation and distribution of various primary and secondary metabolites on surface imprints and in algal cross sections. The UPLC-MS, DESI-IMS and NMR analyses failed to confirm the presence of any surface-associated metabolite, except for mannitol, which were previously reported from F. vesiculosus. This is the first study analysing the seaweed surface microbiome in conjunction with untargeted surface metabolomics and spatial metabolomics approaches.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-MN Marine natural products chemistry
Refereed: Yes
DOI etc.: 10.1038/s41598-018-37914-8
ISSN: 2045-2322
Date Deposited: 05 Feb 2019 11:01
Last Modified: 07 Aug 2019 09:45
URI: http://eprints.uni-kiel.de/id/eprint/45706

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