Environ Sci Pollut Res DOI 10.1007/s11356-015-4314-0
RESEARCH ARTICLE
Analysis of a population of magnetotactic bacteria of the Gulf of Gabès, Tunisia Nathalie Pradel & Jean-Luc Cayol & Marie-Laure Fardeau & Fatma Karray & Sami Sayadi & Didier Alazard & Bernard Ollivier
Received: 15 December 2014 / Accepted: 2 March 2015 # Springer-Verlag Berlin Heidelberg 2015
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 BMed 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.
Responsible editor: Philippe Garrigues Electronic supplementary material The online version of this article (doi:10.1007/s11356-015-4314-0) contains supplementary material, which is available to authorized users. N. Pradel (*) : J.
RESEARCH ARTICLE
Analysis of a population of magnetotactic bacteria of the Gulf of Gabès, Tunisia Nathalie Pradel & Jean-Luc Cayol & Marie-Laure Fardeau & Fatma Karray & Sami Sayadi & Didier Alazard & Bernard Ollivier
Received: 15 December 2014 / Accepted: 2 March 2015 # Springer-Verlag Berlin Heidelberg 2015
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 BMed 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.
Responsible editor: Philippe Garrigues Electronic supplementary material The online version of this article (doi:10.1007/s11356-015-4314-0) contains supplementary material, which is available to authorized users. N. Pradel (*) : J.
