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Abstract
A Gram-negative, aerobic, non-flagellated and ovoid- or rod-shaped bacterium, designated strain SM1902T, was isolated from the sediment sampled at the Jia River estuary, Yantai, PR China. The strain grew at 10–37 °C (optimum, 25–30 °C), pH 6.0–10.0 (pH 7.0) and with 0.5–13.0 % (w/v) NaCl (2.5%). It reduced nitrate to nitrite, but did not produce bacteriochlorophyll a. The results of phylogenetic analysis based on 16S rRNA gene sequences revealed that strain SM1902T constituted a separated lineage within the family Rhodobacteraceae and was closely related to Meridianimarinicoccus roseus TG-679T and Phycocomes zhengii LMIT002T with 96.1 and 94.3 % 16S rRNA gene sequence similarities, respectively. The predominant cellular fatty acid was summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c). The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, an unidentified aminolipid and an unidentified lipid. The sole respiratory quinone was ubiquinone-10. The in silico DNA–DNA hybridization values between strain SM1902T and Meridianimarinicoccus roseus TG-679T and Phycocomes zhengii LMIT002T were 19.6 and 19.5 %, respectively; and the average nucleotide identity values between them were 76.1 and 74.2 %, respectively. The genomic DNA G+C content of strain SM1902T was 58.2 mol%. Based on the phylogenetic, chemotaxonomic and phenotypic data obtained in this study, strain SM1902T is considered to represent a novel species in a new genus within the family Rhodobacteraceae , for which the name Fluviibacterium aquatile gen. nov., sp. nov. is proposed. The type strain is SM1902T (=KCTC 72045T=MCCC 1K03596T=CCTCC AB 2018346T).
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Funding
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National Key R&D Program of China
(Award 2018YFC0310704)
- Principle Award Recipient: Xiu-Lan Chen
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National Key R&D Program of China
(Award 2018YFC1406504)
- Principle Award Recipient: Xiao-Yan Song
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National Key R&D Program of China
(Award 2018YFC1406703)
- Principle Award Recipient: Yu-Zhong Zhang
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National Key R&D Program of China
(Award 2018YFC1406704)
- Principle Award Recipient: Xi-Ying Zhang
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AoShan Talents Cultivation Program
(Award 2017ASTCP-OS14)
- Principle Award Recipient: Yu-Zhong Zhang
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National Science Foundation of China
(Award grants 31670063)
- Principle Award Recipient: Xi-Ying Zhang
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National Science Foundation of China
(Award grants 31870052)
- Principle Award Recipient: Xiu-Lan Chen
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Taishan Scholars Program of Shandong Province
(Award 2009TS079)
- Principle Award Recipient: Yu-Zhong Zhang
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Science and Technology Basic Resources Investigation Program of China
(Award 2017FY100804)
- Principle Award Recipient: Xi-Ying Zhang
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funding from key laboratory of global change and marine-atmospheric chemistry of the State Oceanic Administration, P. R. China
(Award 2018GCMAC16)
- Principle Award Recipient: Xi-Ying Zhang
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Natural Science Foundation of Jiangsu Province
(Award BK20170397)
- Principle Award Recipient: Chun-Yang Li