title: Analysis of a population of magnetotactic bacteria of the Gulf of Gabès, Tunisia.
abstract: The occurrence of magnetotactic bacteria (MTB) on a Tunisian marine coast exposed to heavy metals pollution (Sfax, Gulf of Gabès, Mediterranean Sea) was investigated. The MTB population of this Southern Mediterranean coast was compared to the MTB populations previously investigated on the French Northern Mediterranean coast. A dominant MTB coccus morphotype was observed by microscopy analysis. By pyrosequencing technology, the analysis of the 16S ribosomal RNA (rDNA) revealed as much as 33 operational taxonomic sequence units (OTUs) close to sequences of MTB accessible in the databases. The majority were close to MTB sequences of the "Med group" of α-Proteobacteria. Among them, a dominant OTU_001 (99 % of the MTB sequences) affiliated within the Magnetococcales order was highlighted. Investigating the capacities of this novel bacterium to be used in bioremediation and/or depollution processes could be envisaged.
authors.affiliation: Aix Marseille Université, IRD, Université de Toulon, CNRS, MIO UM 110, 13288, Marseille, France. nathalie.pradel@ird.fr.|Laboratoire Mixte International Contaminants et Ecosystèmes Marins Sud Méditerranéens (LMI COSYS-Med), Marseille, France. nathalie.pradel@ird.fr.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Pradel
authors.affiliation: Aix Marseille Université, IRD, Université de Toulon, CNRS, MIO UM 110, 13288, Marseille, France.
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Cayol
authors.affiliation: Aix Marseille Université, IRD, Université de Toulon, CNRS, MIO UM 110, 13288, Marseille, France.
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Fardeau
authors.affiliation: Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, 3018, Tunisia.|Laboratoire Mixte International Contaminants et Ecosystèmes Marins Sud Méditerranéens (LMI COSYS-Med), Marseille, France.
authors.forename: Fatma
authors.initials: F
authors.lastname: Karray
authors.affiliation: Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, 3018, Tunisia.|Laboratoire Mixte International Contaminants et Ecosystèmes Marins Sud Méditerranéens (LMI COSYS-Med), Marseille, France.
authors.forename: Sami
authors.initials: S
authors.lastname: Sayadi
authors.affiliation: Aix Marseille Université, IRD, Université de Toulon, CNRS, MIO UM 110, 13288, Marseille, France.
authors.forename: Didier
authors.initials: D
authors.lastname: Alazard
authors.affiliation: Aix Marseille Université, IRD, Université de Toulon, CNRS, MIO UM 110, 13288, Marseille, France.|Laboratoire Mixte International Contaminants et Ecosystèmes Marins Sud Méditerranéens (LMI COSYS-Med), Marseille, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: Ollivier
mesh_terms: D020561:Alphaproteobacteria / Q000235:genetics / Q000254:growth & development*; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology*; D008522:Mediterranean Sea; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013499:Surface Properties; D014416:Tunisia; D014871:Water Microbiology
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S
keywords: Magnetococcales; Marine magnetotactic bacteria; Tunisian Mediterranean coast