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  1. Article: Bacterial Epibiotic Communities of Ubiquitous and Abundant Marine Diatoms Are Distinct in Short- and Long-Term Associations.

    Crenn, Klervi / Duffieux, Delphine / Jeanthon, Christian

    Frontiers in microbiology

    2018  Volume 9, Page(s) 2879

    Abstract: Interactions between phytoplankton and bacteria play a central role in mediating biogeochemical cycling and food web structure in the ocean. The cosmopolitan ... ...

    Abstract Interactions between phytoplankton and bacteria play a central role in mediating biogeochemical cycling and food web structure in the ocean. The cosmopolitan diatoms
    Language English
    Publishing date 2018-12-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2018.02879
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: The hydrological context determines the beta-diversity of aerobic anoxygenic phototrophic bacteria in European Arctic seas but does not favor endemism.

    Lehours, Anne-Catherine / Jeanthon, Christian

    Frontiers in microbiology

    2015  Volume 6, Page(s) 638

    Abstract: Despite an increasing number of studies over the last 15 years, aerobic anoxygenic photoheterotrophic (AAP) bacteria remain a puzzling functional group in terms of physiology, metabolism, and ecology. To contribute to a better knowledge of their ... ...

    Abstract Despite an increasing number of studies over the last 15 years, aerobic anoxygenic photoheterotrophic (AAP) bacteria remain a puzzling functional group in terms of physiology, metabolism, and ecology. To contribute to a better knowledge of their environmental distribution, the present study aims at analyzing their diversity and structure at the boundary between the Norwegian, Greenland, and Barents Seas. The polymorphism of a marker gene encoding a sub-unit of the photosynthetic apparatus (pufM gene) was analyzed and attempted to be related to environmental parameters. The Atlantic or Arctic origin of water masses had a strong impact on the AAP bacterial community structure whose populations mostly belonged to the Alpha- and Gammaproteobacteria. A majority (>60%) of pufM sequences were affiliated to the Gammaproteobacteria reasserting that this class often represents the major component of the AAP bacterial community in oceanic regions. Two alphaproteobacterial groups dominate locally suggesting that they can constitute key players in this marine system transiently. We found that temperature is a major determinant of alpha diversity of AAP bacteria in this marine biome with specific clades emerging locally according to the partitioning of water masses. Whereas we expected specific AAP bacterial populations in this peculiar and newly explored ecosystem, most pufM sequences were highly related to sequences retrieved elsewhere. This observation highlights that the studied area does not favor AAP bacteria endemism but also opens new questions about the truthfulness of biogeographical patterns and on the extent of AAP bacterial diversity.
    Language English
    Publishing date 2015-07-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2015.00638
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Complete Genome Sequence of the Silicimonas algicola Type Strain, a Representative of the Marine

    Crenn, Klervi / Bunk, Boyke / Spröer, Cathrin / Overmann, Jörg / Jeanthon, Christian

    Microbiology resource announcements

    2019  Volume 8, Issue 9

    Abstract: Silicimonas algicola strain ... ...

    Abstract Silicimonas algicola strain KC90B
    Language English
    Publishing date 2019-02-28
    Publishing country United States
    Document type Journal Article
    ISSN 2576-098X
    ISSN (online) 2576-098X
    DOI 10.1128/MRA.00108-19
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Exploring the phycosphere of Emiliania huxleyi: From bloom dynamics to microbiome assembly experiments.

    Câmara Dos Reis, Mariana / Romac, Sarah / Le Gall, Florence / Marie, Dominique / Frada, Miguel J / Koplovitz, Gil / Cariou, Thierry / Henry, Nicolas / de Vargas, Colomban / Jeanthon, Christian

    Molecular ecology

    2023  Volume 32, Issue 23, Page(s) 6507–6522

    Abstract: Coccolithophores have global ecological and biogeochemical significance as the most important calcifying marine phytoplankton group. The structure and selection of prokaryotic communities associated with the most abundant coccolithophore and bloom- ... ...

    Abstract Coccolithophores have global ecological and biogeochemical significance as the most important calcifying marine phytoplankton group. The structure and selection of prokaryotic communities associated with the most abundant coccolithophore and bloom-forming species, Emiliania huxleyi, are still poorly known. In this study, we assessed the diversity of bacterial communities associated with an E. huxleyi bloom in the Celtic Sea (Eastern North Atlantic), exposed axenic E. huxleyi cultures to prokaryotic communities derived from bloom and non-bloom conditions, and followed the dynamics of their microbiome composition over one year. Bloom-associated prokaryotic communities were dominated by SAR11, Marine group II Euryarchaeota and Rhodobacterales and contained substantial proportions of known indicators of phytoplankton bloom demises such as Flavobacteriaceae and Pseudoalteromonadaceae. The taxonomic richness of bacteria derived from natural communities associated with axenic E. huxleyi rapidly shifted and then stabilized over time. The succession of microorganisms recruited from the environment was consistently dependent on the composition of the initial bacterioplankton community. Phycosphere-associated communities derived from the E. huxleyi bloom were highly similar to one another, suggesting deterministic processes, whereas cultures from non-bloom conditions show an effect of stochasticity. Overall, this work sheds new light on the importance of the initial inoculum composition in microbiome recruitment and elucidates the temporal dynamics of its composition and long-term stability.
    MeSH term(s) Haptophyta/genetics ; Phytoplankton/genetics ; Aquatic Organisms ; Bacteria ; Microbiota/genetics
    Language English
    Publishing date 2023-01-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1126687-9
    ISSN 1365-294X ; 0962-1083
    ISSN (online) 1365-294X
    ISSN 0962-1083
    DOI 10.1111/mec.16829
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 2005/723: Show issues

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  5. Article ; Online: The Pharaoh's snakes of the teasel: New insights into Francis Darwin's observations.

    Vergne, Antoine / Giraud, Eric / Camuel, Alicia / Bardot, Corinne / Billard, Hermine / Bouquet, Clémentin / Corbara, Bruno / Gully, Djamel / Mathonat, Frédéric / Jeanthon, Christian / Mary, Isabelle / Caissard, Jean-Claude / Lehours, Anne-Catherine

    Ecology

    2023  Volume 104, Issue 5, Page(s) e4030

    MeSH term(s) Animals ; Dipsacaceae ; Biological Evolution ; Ants
    Language English
    Publishing date 2023-03-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2010140-5
    ISSN 1939-9170 ; 0012-9658
    ISSN (online) 1939-9170
    ISSN 0012-9658
    DOI 10.1002/ecy.4030
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  6. Article ; Online: Biogeographic patterns of aerobic anoxygenic phototrophic bacteria reveal an ecological consistency of phylogenetic clades in different oceanic biomes.

    Lehours, Anne-Catherine / Enault, François / Boeuf, Dominique / Jeanthon, Christian

    Scientific reports

    2018  Volume 8, Issue 1, Page(s) 4105

    Abstract: In marine environments, aerobic anoxygenic phototrophic (AAP) bacterial assemblages vary in space and along environmental gradients but the factors shaping their diversity and distribution at different taxonomic levels remain poorly identified. Using ... ...

    Abstract In marine environments, aerobic anoxygenic phototrophic (AAP) bacterial assemblages vary in space and along environmental gradients but the factors shaping their diversity and distribution at different taxonomic levels remain poorly identified. Using sets of sequences encoding the M sub-unit of the photosynthetic apparatus from different oceanic regions, we prioritized the processes underlying AAP bacterial biogeographical patterns. The present analysis offers novel insights into the ecological distribution of marine AAP bacteria and highlights that physiological constraints play a key role in structuring AAP bacterial assemblages at a global scale. Salinity especially seems to favor lineage-specific adaptations. Moreover, by inferring the evolutionary history of habitat transitions, a substantial congruence between habitat and evolutionary relatedness was highlighted. The identification of ecological cohesive clades for AAP bacteria suggests that prediction of AAP bacterial assemblages is possible from marine habitat properties.
    MeSH term(s) Bacteria, Aerobic/physiology ; Ecosystem ; Models, Biological ; Oceans and Seas ; Photosynthesis/physiology ; Phylogeny ; Phylogeography ; Seawater/microbiology
    Language English
    Publishing date 2018-03-07
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-018-22413-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Summer Abundance and Distribution of Proteorhodopsin Genes in the Western Arctic Ocean.

    Boeuf, Dominique / Lami, Raphaël / Cunnington, Emelyne / Jeanthon, Christian

    Frontiers in microbiology

    2016  Volume 7, Page(s) 1584

    Abstract: Proteorhodopsins (PR) are phylogenetically diverse and highly expressed proton pumps in marine bacterial communities. The phylogenetic diversity ... ...

    Abstract Proteorhodopsins (PR) are phylogenetically diverse and highly expressed proton pumps in marine bacterial communities. The phylogenetic diversity and
    Language English
    Publishing date 2016-10-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2016.01584
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Exploring the Cultivable

    KleinJan, Hetty / Jeanthon, Christian / Boyen, Catherine / Dittami, Simon M

    Frontiers in microbiology

    2017  Volume 8, Page(s) 2456

    Abstract: Coastal areas form the major habitat of brown macroalgae, photosynthetic multicellular eukaryotes that have great ecological value and industrial potential. Macroalgal growth, development, and physiology are influenced by the microbial community they ... ...

    Abstract Coastal areas form the major habitat of brown macroalgae, photosynthetic multicellular eukaryotes that have great ecological value and industrial potential. Macroalgal growth, development, and physiology are influenced by the microbial community they accommodate. Studying the algal microbiome should thus increase our fundamental understanding of algal biology and may help to improve culturing efforts. Currently, a freshwater strain of the brown macroalga
    Language English
    Publishing date 2017-12-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2017.02456
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: First report of vampyrellid predator-prey dynamics in a marine system.

    Alves-de-Souza, Catharina / Benevides, Tatiane S / Menezes, Mariângela / Jeanthon, Christian / Guillou, Laure

    The ISME journal

    2018  Volume 13, Issue 4, Page(s) 1110–1113

    Abstract: We report for the first time the in situ dynamics of a vampyrellid in a marine system. A high sampling frequency (twice-weekly) was applied in a tropical eutrophic lagoon (Rio de Janeiro, Brazil) for 5 years (2012-2016). The vampyrellid Hyalodiscus sp. ... ...

    Abstract We report for the first time the in situ dynamics of a vampyrellid in a marine system. A high sampling frequency (twice-weekly) was applied in a tropical eutrophic lagoon (Rio de Janeiro, Brazil) for 5 years (2012-2016). The vampyrellid Hyalodiscus sp. specifically fed on the diatom Chaetoceros minimus during a short time window (~3 months), although the prey was intermittently detected as the dominant phytoplanktonic species over a longer period (~1 year). A classic Lotka-Volterra predator-prey dynamic was observed between the two partners, with a significant modification of the short-term oscillations of the prey. Specific abiotic preferences (i.e., relatively low temperature, intermediate salinity, and stratified conditions) associated with prey availability seemed to define this narrow temporal window of occurrence. Our results suggest that vampyrellids can be ecologically relevant in marine pelagic systems, with their impact on planktonic dynamics strongly depending on complex interactions between both biotic and abiotic factors.
    MeSH term(s) Brazil ; Cercozoa/physiology ; Diatoms ; Ecosystem ; Phytoplankton ; Seawater
    Language English
    Publishing date 2018-12-06
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2406536-5
    ISSN 1751-7370 ; 1751-7362
    ISSN (online) 1751-7370
    ISSN 1751-7362
    DOI 10.1038/s41396-018-0329-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 7773: Show issues

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  10. Article ; Online: Silicimonas algicola gen. nov., sp. nov., a member of the Roseobacter clade isolated from the cell surface of the marine diatom Thalassiosira delicatula.

    Crenn, Klervi / Serpin, Delphine / Lepleux, Cendrella / Overmann, Jörg / Jeanthon, Christian

    International journal of systematic and evolutionary microbiology

    2016  Volume 66, Issue 11, Page(s) 4580–4588

    Abstract: A Gram-negative, aerobic, non-motile bacterium, designated strain KC90BT, was isolated from the surface of a cell of the marine diatom Thalassiosira delicatula. The bacterial cells were pleomorphic and formed very small, beige colonies on marine agar. ... ...

    Abstract A Gram-negative, aerobic, non-motile bacterium, designated strain KC90BT, was isolated from the surface of a cell of the marine diatom Thalassiosira delicatula. The bacterial cells were pleomorphic and formed very small, beige colonies on marine agar. Optimal growth was obtained at 25 °C, at pH 6.5-7.5 and in the presence of 1.5-2.0 % (w/v) NaCl. Phylogenetic analyses based on its 16S rRNA gene sequence revealed that strain KC90BT belonged to the Roseobacter clade and formed a monophyletic cluster with the sequences of Boseongicola aestuarii, Profundibacterium mesophilum, Hwanghaeicola aestuarii, Maribius pelagius and M. salinus, showing 91.4-95.7 % sequence similarities. Ubiquinone Q-10 was the predominant lipoquinone but a significant amount of ubiquinone Q-9 was also detected. The major cellular fatty acids were C18 : 1ω7c, 11-methyl C18 : 1ω7c and C18 : 0. Strain KC90BT also contained specific fatty acids (C17 : 0, anteiso-C15 : 0 and anteiso-C17 : 0) that were not detected in its closest described relatives. The major polar lipids of strain KC90BT comprised phosphatidylglycerol, phosphatidylcholine, diphosphatidylglycerol and an unidentified aminolipid. The DNA G+C content of strain KC90BT was 65.2 mol%. The phylogenetic analysis of strain KC90BT, together with the differential phenotypic and chemotaxonomic properties demonstrate that strain KC90BT is distinct from type strains of B. aestuarii, P. mesophilum, H. aestuarii, M. pelagius and M. salinus. Based on the data presented in this study, strain KC90BT represents a novel genus and species within the family Rhodobacteraceae, for which the name Silicimonas algicola gen. nov., sp. nov. is proposed. The type strain is KC90BT (=DSM 103371T=RCC 4681T).
    MeSH term(s) Bacterial Typing Techniques ; Base Composition ; DNA, Bacterial/genetics ; Diatoms/microbiology ; Fatty Acids/chemistry ; Phospholipids/chemistry ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Rhodobacteraceae/classification ; Rhodobacteraceae/genetics ; Rhodobacteraceae/isolation & purification ; Seawater/microbiology ; Sequence Analysis, DNA ; Ubiquinone/chemistry
    Chemical Substances DNA, Bacterial ; Fatty Acids ; Phospholipids ; RNA, Ribosomal, 16S ; Ubiquinone (1339-63-5) ; Ubiquinone Q2 (I7T5V2W47R) ; ubiquinone 9 (MGW7TYF2DQ)
    Language English
    Publishing date 2016-08-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 2002336-4
    ISSN 1466-5034 ; 1466-5026
    ISSN (online) 1466-5034
    ISSN 1466-5026
    DOI 10.1099/ijsem.0.001394
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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