Roseivirga ehrenbergii gen. nov., sp. nov., a novel marine bacterium of the phylum ‘Bacteroidetes’, isolated from the green alga Ulva fenestrata

Abstract

The taxonomic position of a novel marine bacterium isolated from the green alga Ulva fenestrata collected in the Sea of Japan was established. Cells of the strain studied, designated KMM 6017T, were strictly aerobic, heterotrophic, pink-pigmented, non-motile by gliding, Gram-negative and oxidase-, catalase-, β-galactosidase- and alkaline phosphatase-positive. 16S rRNA gene sequence analysis indicated that the strain occupied a distinct lineage within the phylum ‘Bacteroidetes’ and formed a cluster with [Flexibacter] tractuosus and Reichenbachia agariperforans. The G+C content of the DNA of KMM 6017T was 40·2 mol%. The major respiratory quinone was MK-7. The predominant fatty acids were i15 : 1, i15 : 0 and i17 : 0 3-OH (34·2, 24 and 7·7 %, respectively). On the basis of phenotypic, chemotaxonomic, genotypic and phylogenetic characteristics, the novel bacterium was assigned to the genus Roseivirga gen. nov., as Roseivirga ehrenbergii gen. nov., sp. nov. The type strain is KMM 6017T (=KCTC 12282T=LMG 22567T).

Cesiribacter andamanensis gen. nov., sp. nov., isolated from a soil sample from a mud volcano

“…The systematics of the family 'Flammeovirgaceae' are currently in a state of expansion, with many new genera being described within the last 6 years, including Fabibacter, Limibacter, Marinoscillum, Perexilibacter, Rapidithrix, Reichenbachiella, Marivirga and Roseivirga, from a wide variety of habitats such as decayed wood, sea shells (Srisukchayakul et al, 2007), fresh water (Nedashkovskaya et al, 2010), marine algae (Nedashkovskaya et al, 2005a;Srisukchayakul et al, 2007), sediment (Yoon et al, 2007(Yoon et al, , 2008, sponges (Lau et al, 2006;Seo et al, 2009) and seawater (Nedashkovskaya et al, 2005b). In the present study, we describe a novel bacterium isolated from a soil sample collected from a mud volcano that is assigned to a new genus that belongs to the family 'Flammeovirgaceae'.…”

Roseivirga echinicomitans sp. nov., a novel marine bacterium isolated from the sea urchin Strongylocentrotus intermedius, and emended description of the genus Roseivirga

“…The genus Roseivirga accommodates Gram-negative, strictly aerobic, heterotrophic, pink-pigmented, non-motile marine bacteria that belong to the phylum 'Bacteroidetes' (Nedashkovskaya et al, 2005). The single strain of this genus was isolated from the green alga Ulva fenestrata and described as Roseivirga ehrenbergii.…”

Marinoscillum gen. nov., a member of the family 'Flexibacteraceae', with Marinoscillum pacificum sp. nov. from a marine sponge and Marinoscillum furvescens nom. rev., comb. nov.

“…; 4, genus Roseivirga (three species). Data were taken from this study, Lewin (1969), Lau et al (2006), Nedashkovskaya et al (2003Nedashkovskaya et al ( , 2005aNedashkovskaya et al ( , b, 2008 and Yoon et al (2005). +, Positive reaction; 2, negative reaction; V, variable; (+), weakly positive; All taxa are positive for oxidase and catalase activities and possess MK-7 as the major respiratory quinone.…”