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Alteromonas genovensis sp. nov., isolated from a marine electroactive biofilm and emended description of Alteromonas macleodii Baumann et al. 1972 (Approved Lists 1980)

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 Instituto di Scienze Marine – Consiglio Nazionale delle Ricerche (ISMAR-CNR), Via de Marini 6, 16149 Genoa, Italy

Correspondence
Ilse Vandecandelaere
Ilse.Vandecandelaere{at}UGent.be

Thirty-five isolates obtained from a marine electroactive biofilm grown on a stainless steel cathode (Genoa, Italy) were investigated by a polyphasic taxonomic approach. Whole-cell fatty acid methyl ester analysis indicated that the isolates belonged to the class Gammaproteobacteria and were closely related or belonging to the genus Alteromonas. Genomic fingerprinting using the BOX-PCR primer delineated five clusters of isolates with similar BOX-PCR fingerprints. This study demonstrated that isolates from four of the BOX-PCR clusters belonged to Alteromonas macleodii and that the 14 isolates representing BOX-PCR cluster 1 constituted a novel species, which shared 98.4 % 16S rRNA gene sequence similarity with its nearest phylogenetic neighbour, Alteromonas hispanica. Both phenotypic and genotypic analyses enabled this novel species, for which the name Alteromonas genovensis sp. nov. is proposed, to be differentiated from established species of the genus Alteromonas. The DNA G+C content of Alteromonas genovensis sp. nov. is 44.5 mol% and the type strain is LMG 24078^T (=CCUG 55340^T).

DNA–DNA hybridization results and additional electron micrographs are available with the online version of this paper.

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