1887

Abstract

A novel Gram-stain-negative, strictly aerobic, coccoid and agar-hydrolysing bacterium, designated RQJ05, was isolated from the marine red algae collected from the coastal area of Rizhao, PR China. Cells of strain RQJ05 were approximately 0.8–1.0×1.3–3.0 µm in size and motile by means of a polar flagellum. Growth occurred at 4–33 °C (optimum, 25–30 °C), pH 7.0–8.5 (optimum, pH 7.5–8.0) and in the presence of 1.0–7.0 % (w/v) NaCl (optimum, 2.0–3.0 %). Strain RQJ05 showed oxidase-positive and catalase-negative activities. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain RQJ05 formed a phylogenetic lineage with members of the family and exhibited 16S rRNA gene sequence similarities of 92.6, 91.3, 90.2 and 90.1 % to Q1, YM01, NSCS20N07D and B-10-31, respectively. The major cellular fatty acids of strain RQJ05 were summed feature 3 (C 7 and/or C 6), C and summed feature 8 (C 7 and/or C 6). The major polar lipids of strain RQJ05 were phosphatidylethanolamine, phosphatidylglycerol and two aminophospholipids. Strain RQJ05 contained Q-8 as the major respiratory quinone. The genomic DNA G+C content was 39.0 mol%. On the basis of genotypic, phenotypic and phylogenetic evidence, strain RQJ05 is presented as a representative of a novel species in a new genus, for which the name gen. nov., sp. nov. is proposed. The type strain is RQJ05 (=KCTC 62846=MCCC 1H00352).

Funding
This study was supported by the:
  • National Natural Science Foundation of China (Award 31770002)
    • Principle Award Recipient: Zong-Jun Du
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/content/journal/ijsem/10.1099/ijsem.0.004558
2020-12-17
2021-07-29
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