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    Citreicella manganoxidans sp. nov., a novel manganese oxidizing bacterium isolated from a shallow water hydrothermal vent in Espalamaca (Azores)

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    Date
    2015
    Author
    Rajasabapathy, R.
    Mohandass, C.
    Dastager, S.G.
    Liu, Q.
    Li, W.-J.
    Colaco, A.
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    Abstract
    A Gram-stain negative, non-motile, non-spore forming, aerobic and rod or narrow lemon-shaped bacterial strain, VSW210<sup>T</sup>, was isolated from surface seawater in a shallow water hydrothermal vent region in Espalamaca (Azores). Strain VSW210<sup>T</sup> was found to grow optimally at 30 °C, at pH 7 and in the presence of 2–6 % (w/v) NaCl. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences revealed that strain VSW210<sup>T</sup> clusters with the type strain Citreicella marina CK-I3-6<sup>T</sup> (sequence similarity value of 99.6 %), but DNA–DNA hybridization showed DNA–DNA relatedness between the strain VSW210<sup>T</sup> and C. marina CK-I3-6<sup>T</sup> to be 55.8 ± 3.2 %. The DNA G+C content of strain VSW210<sup>T</sup> was determined to be 67.4 mol%. The cellular fatty acid profiles of strain VSW210<sup>T</sup> was found to contain C<sub>18:1</sub> ω7c (80.1 %) and C<sub>16:0</sub> (9.2 %). The major polar lipids in strain VSW210<sup>T</sup> were identified as phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and an unidentified phospholipid. Strain VSW210<sup>T</sup> was found to be able to oxidize soluble Mn(II) to insoluble MnO<sub>2</sub>, which was confirmed with LBB staining. Differential phenotypic properties and genetic uniqueness revealed that this strain VSW210<sup>T</sup> is distinguishable from other species of the genus Citreicella. On the basis of the data presented, strain VSW210<sup>T</sup> is considered to represent a novel species of the genus Citreicella, for which the name Citreicella manganoxidans sp. nov. is proposed. The type strain is VSW210<sup>T</sup> (=KCTC 32497<sup>T</sup> = MCC 2286<sup>T</sup>)
    URI
    http://drs.nio.org/drs/handle/2264/4868
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