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Abstract
A novel bacterium, designated JB02H27T, was isolated from marine sediment collected from the southern Scott Coast, Antarctica. Cells were Gram-stain-negative, facultatively anaerobic, polar-flagellated and motile rods. Growth occurred at 4–45 °C, at pH 7.0–9.0 and with 3–25 % (w/v) NaCl. Phylogenetic trees based on 16S rRNA gene sequences showed that strain JB02H27T consistently fell within the genus Marinobacter and formed a clade together with Marinobacter algicola DG893T (98.8 % similarity), Marinobacter confluentis KCTC 42705T (98.4 %), Marinobacter salarius R9SW1T (98.4%) and Marinobacter halotolerans CP12T (97.9 %), which were subsequently used as reference strains for comparisons of phenotypic and chemotaxonomic characteristics. Average nucleotide identity values between strain JB02H27T and the four related type strains were 80.9, 76.6, 81.9 and 76.3 %, respectively. The major fatty acids were summed feature 3, C16 : 0, C18 : 1 ω9c and C16 : 0 N alcohol. The polar lipids included phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and an unidentified phospholipid, aminolipid, aminophospholipid and glycolipids. The sole respiratory quinone was ubiquinone-9. The DNA G+C content was 56.9 mol%. Based on the genomic, phylogenetic, phenotypic and chemotaxonomic analysis, we propose that strain JB02H27T represents a novel species of the genus Marinobacter , for which the name Marinobacter denitrificans sp. nov. is proposed. The type strain is JB02H27T (=GDMCC 1.1528T=KCTC 62941T).
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Funding
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GDAS' Special Project of Science and Technology Development
(Award 2020GDASYL-20200302002)
- Principle Award Recipient: Ming-Xia Zhang
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Science and Technology Plan Project of Guangzhou
(Award 201704020088)
- Principle Award Recipient: Hong-Hui Zhu
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Science and Technology Plan Project of Guangdong
(Award 2019B030316009, 2018A030313476)
- Principle Award Recipient: Hong-Hui Zhu
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Pearl River S&T Nova Program of Guangzhou
(Award 201806010065)
- Principle Award Recipient: An-Zhang Li
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Guangdong Province Science and Technology Innovation Strategy Special Fund
(Award 2019B020215001)
- Principle Award Recipient: Ming-Xia Zhang