Oceanicella actignis gen. nov., sp. nov., a halophilic slightly thermophilic member of the Alphaproteobacteria |
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Authors: | Luciana Albuquerque Fred A Rainey M Fernanda Nobre Milton S da Costa |
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Institution: | Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal. |
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Abstract: | Two isolates, designated PRQ-67T and PRQ-68, with an optimum growth temperature of about 50 °C, growth range in medium containing between 1 and 9% NaCl and an optimum pH for growth between 7.5 and 8.0, were recovered from a shallow marine hot spring on a beach, Praia do Fogo, at Ribeira Quente, on the Island of São Miguel in the Azores. Comparisons of 16S rRNA gene sequences show these strains to be most closely related (93.1–94.7% similarity) to species of the genus Amaricoccus, within the family Rhodobacteraceae. Strains are non-pigmented and form non-motile pleomorphic cells that stain Gram-negative, are aerobic, oxidase and catalase positive. The major fatty acids are C18:1ω7c and C18:1ω7c 11-methyl. Ubiquinone 10 is the major respiratory quinone. Major polar lipids are phosphatidylcholine, phosphatidylglycerol and one aminolipid. Based on 16S rRNA gene sequence analysis, physiological and biochemical characteristics we describe a new species of a novel genus represented by strain PRQ-67T (=DSM 22673T = LMG 25334T) for which we propose the name Oceanicella actignis. |
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Keywords: | New taxa Alphaproteobacteria Oceanicella actignis |
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