Nautella italica gen. nov., sp. nov., isolated from a marine electroactive biofilm

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, Département d'Ecophysiologie Végétale et de Microbiologie/DSV CEA Cadarache, F-13108 Saint-Paul-lès-Durance, France 3 Istituto di Scienze Marine–Consiglio Nazionale delle Ricerche (ISMAR–CNR), Via de Marini 6, I-16149 Genoa, Italy Correspondence Ilse Vandecandelaere Ilse.Vandecandelaere{at}UGent.be Five isolates obtained from a marine electroactive biofilm grown on a stainless steel cathode were investigated by using a polyphasic taxonomic approach. Analyses of whole-cell fatty acid methyl esters and 16S rRNA gene sequences showed that the isolates belonged to the Roseobacter lineage of the class Alphaproteobacteria . Both phenotypic and genotypic analyses demonstrated that the five new isolates constituted a single species that did not represent a recognized member of the Roseobacter lineage. Therefore the five isolates represent a novel genus and species, for which the name Nautella italica gen. nov., sp. nov. is proposed. The type strain is LMG 24365 T (=CCUG 55857 T ). The DNA G+C content of the type strain is 61 mol%. Abbreviations: EAB, electroactive biofilm The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains LMG 24365 T , LMG 24364, R-25532, R-28717 and R-28753 are AM904562 , AM904563 , AM944520 , AM944521 and AM944522 , respectively.