title: Diversity of magnetotactic bacteria from a French pristine Mediterranean area.
abstract: Magnetotactic bacteria synthesize intracellular magnetite and/or greigite magnetosome crystals. They play a significant role in both iron and sulfur cycles in sedimentary aquatic environments. To get insight into the bio-geochemical contribution of MTB, more studies concerning their ecology and their distribution in diverse habitats are necessary. The MTB community of an oil-industry polluted area of the French Mediterranean coast has been previously investigated. Here, we investigate the MTB community from coastal sediments of a Mediterranean pristine area using optical and transmission electron microscopy and phylogenetic analysis based on 16S rRNA gene sequences. A particularly high diversity of MTB was observed, with cocci phylogenetically distributed across the order Magnetococcales, including a novel cluster with sequences from the Mediterranean Sea designated as "Med group", and novel morphotypes.
authors.affiliation: Aix-Marseille Université, IRD, CNRS/INSU, MIO, UM 110, Case 901, 13288, Marseille, Cedex 09, France.
authors.forename: Maxime
authors.initials: M
authors.lastname: Fuduche
authors.forename: Anne
authors.initials: A
authors.lastname: Postec
authors.forename: Sylvain
authors.initials: S
authors.lastname: Davidson
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Chauvin
authors.forename: Grégoire
authors.initials: G
authors.lastname: Galès
authors.forename: Agnès
authors.initials: A
authors.lastname: Hirschler-Réa
authors.forename: Bernard
authors.initials: B
authors.lastname: Ollivier
authors.forename: Long-Fei
authors.initials: LF
authors.lastname: Wu
authors.forename: Nathalie
authors.initials: N
authors.lastname: Pradel
mesh_terms: D020561:Alphaproteobacteria / Q000145:classification* / Q000302:isolation & purification* / Q000378:metabolism; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D052203:Ferrosoferric Oxide / Q000378:metabolism*; D005602:France; D007501:Iron / Q000378:metabolism*; D008522:Mediterranean Sea; D008853:Microscopy; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology; D013440:Sulfides / Q000378:metabolism*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D013440:Sulfides; C111959:greigite; D007501:Iron; D052203:Ferrosoferric Oxide