ABSTRACT
Six strains of Gram-negative, rod-shaped, non-spore-forming bacteria were isolated from the Mediterranean Sea. 16S rRNA gene sequence analysis indicated that the strains were affiliated within the alphaproteobacterial genus Brevundimonas, with Brevundimonas intermedia (99.4 %) and Brevundimonas vesicularis (99.2 %) as their closest relatives. This affiliation was supported by chemotaxonomic data (major polar lipids: phosphatidyl diacylglycerol, sulfoquinovosyl diacylglycerol and phosphatidyl glucopyranosyl diacylglycerol; major fatty acids: C(18 : 1), C(16 : 0), C(16 : 1), C(15 : 0), C(17 : 1)omega8c, 11-Me-C(18 : 1)omega5t). The results of DNA-DNA hybridization and physiological and biochemical tests allowed genotypic and phenotypic differentiation of the strains from all recognized Brevundimonas species. The strains therefore represent a novel species, for which the name Brevundimonas mediterranea sp. nov. is proposed, with the type strain V4.BO.10T)(=LMG 21911T=CIP 107934T).
Subject(s)
Caulobacteraceae/classification , Seawater/microbiology , Caulobacteraceae/chemistry , Caulobacteraceae/genetics , Caulobacteraceae/isolation & purification , DNA, Bacterial/analysis , DNA, Ribosomal/analysis , Genes, rRNA , Genotype , Mediterranean Sea , Molecular Sequence Data , Nucleic Acid Hybridization , Phenotype , Phylogeny , RNA, Ribosomal, 16S/genetics , Sequence Analysis, DNAABSTRACT
Arcicella aquatica NO-502(T), obtained from a neuston film on a freshwater lake and belonging to the phylum Bacteroidetes, is characterized by ring-forming cells. The bacterium is a strict aerobe, with optimal growth between 28 and 30 degrees C. Carbohydrates, but no organic acids or amino acids, are used as substrates. The G+C content of strain NO-502(T) is 34.5 mol%; its genome size is 2.9 x 10(9) Da. The genus Arcicella and its type species Arcicella aquatica (type strain NO-502(T)=LMG 21963(T)=CIP 107990(T)) are proposed, and descriptions of this genus and species are given.
