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1 Laboratorium voor Microbiologie, Vakgroep Biochemie, Fysiologie en Microbiologie, Universiteit Gent, K. L. Ledeganckstraat 35, B-9000 Gent, Belgium
2 LEMiR, Laboratoire d'Ecologie Microbienne de la Rhizosphère, CNRS-CEA-Université de la Méditerranée, DEVM, Dpt Ecophysiologie Végétale et de Microbiologie/DSV CEA Cadarache, 13108 Saint Paul Lez Durance, France
3 Istituto di Scienze Marine – Consiglio Nazionale delle Ricerche (ISMAR–CNR), Via de Marini 6, 16149 Genoa, Italy
Correspondence
Ilse Vandecandelaere
Ilse.Vandecandelaere{at}UGent.be
Seventy isolates were obtained from a marine electroactive biofilm that was generated on a cathodically polarized stainless steel electrode (Genoa, Italy). The genetic diversity was investigated by means of BOX-PCR fingerprinting and two clusters of isolates with similar BOX-PCR profiles were delineated. Whole-cell fatty acid methyl ester analysis and 16S rRNA gene sequence analysis showed that the isolates belonged to the Roseobacter lineage of the class Alphaproteobacteria. DNA–DNA hybridization experiments and a biochemical analysis demonstrated that four isolates belonged to the species Ruegeria mobilis. However, 66 isolates from the second BOX-PCR cluster constituted a novel species within the genus Ruegeria, for which the name Ruegeria scottomollicae sp. nov. is proposed. The DNA G+C content was 61.0±0.4 %. The type strain is LMG 24367T (=CCUG 55858T).
A dendrogram representing the BOX-PCR profiles of the 70 isolates material described in this work is available as supplementary material with the online version of this paper.
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