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Volume 70, Issue 1

sp. nov., an agar-degrading marine bacterium isolated from red algae Free

Abstract

A Gram-stain-negative, aerobic and curved-rod-shaped bacterium, designated QM202, was isolated from red algae (). Cells of strain QM202 were 0.2–0.3 µm wide and 1.0–2.5 µm long, catalase-negative and oxidase-positive. The strain exhibited an agar-degrading activity. It was motile by means of a single polar flagellum. Optimal growth occurred at 28–30 °C, pH 7.0–7.5 and in the presence of 2.0–3.0 % (w/v) NaCl. The DNA G+C content was 41.4 mol%. The isoprenoid quinone was identified as Q-8. Phophatidylethanolamine and phosphatidylglycerol were the predominant phospholipids. The dominant fatty acids were Cω7, C and Cω7 and/or iso-C 2-OH. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain QM202 belonged to the genus . The closest described neighbour in terms of 16S rRNA gene sequence identity was MED121 (95.5 %). The differential phenotypic properties, together with the phylogenetic and genetic distinctiveness indicated that strain QM202 can be considered to represent a novel species, sp. nov. The type strain is QM202 (=KCTC 52475=MCCC 1H00145).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Marinomonas , polyphasic taxonomy and red algae
Funding
This study was supported by the:
  • National Natural Science Foundation of China (Award 31770002)
  • Science and Technology Basic Resources Investigation Program of China (Award 2017FY100300)
© 2020 The Authors
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2019-09-19
2024-04-20
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Marinomonas agarivorans sp. nov., an agar-degrading marine bacterium isolated from red algae
Int J Syst Evol Microbiol 70, 100 (2020); https://doi.org/10.1099/ijsem.0.003723
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