A gram-negative, non-motile, pigmented, rod-shaped and strictly aerobic bacterium (CB1052
T) was isolated from a temperate estuary. On the basis of 16S rRNA gene sequence similarity, strain CB1052
T belongs to the α-3 subclass of the
Proteobacteria, within the family
Rhodobacteraceae, having the highest similarity to members of the genus
Marivita (97.8%) of the
Roseobacter lineage. Pylogenetic analysis showed CB1052
T to be a distinct sister clade to
M. litorea and
M. cryptomonadis and DNA-DNA relatedness was quite low amongst the strains (< 35%). Strain CB1052
T cells are non-motile and display a needle-like filamentous form, where individual cells can become quite elongated (up to 15μm). Similar to
M. litorea and
M. cryptomonadis, CB1052
T harbors aerobic anoxygenic photosynthesis genes. However, in contrast to other described
Marivita species, strain CB1052
T actively produces bacteriochlorophyll
a. Further physiological features, including antibiotic sensitivities, differentiate strain CB1052
T from the other members of the genus. Therefore, strain CB1052
T is considered to represent a novel species of the genus
Marivita, for which the name
Marivita roseacus sp. nov. is proposed, with the type strain CB1052
T (=DSM 23118
T =ATCC BAA 1914
T).
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