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<p>An aerobic phosphorus-recovering strain, designated WS-203<sup>T</sup>, was isolated from mangrove sediment. Strain WS-203<sup>T</sup> showed the highest 16S rRNA gene sequence similarity to the type strain of <i>Pelagibacterium lacus</i> (98.1%). A phylogenetic tree based on 16S rRNA gene sequences indicated that strain WS-203<sup>T</sup> clustered with members of the genus <i>Pelagibacterium</i>. Growth of strain WS-203<sup>T</sup> was observed at 20–37&#xa0;°C (optimum, 30&#xa0;°C), pH 6.0–9.5 (optimum, pH 7.5) and with 0–9.0% (w/v) NaCl (optimum, 3.0%). Strain WS-203<sup>T</sup> contained Q-10 as the respiratory quinone and C<sub>18:1</sub> <i>ω</i>6<i>c</i>/C<sub>18:1</sub> <i>ω</i>7<i>c</i> and C<sub>19:0</sub> <i>ω</i>8<i>c</i> cyclo as the major fatty acids. The polar lipids detected in the strain were diphosphatidylglycerol, phosphatidylglycerol, two unidentified phospholipids, two unidentified lipids and four unidentified glycolipids. The genomic DNA G + C content of strain WS-203<sup>T</sup> was 62.2%. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain WS-203<sup>T</sup> and the closely related <i>Pelagibacterium lacus</i> were 78.6% and 21.7%, respectively, which were lower than the cut-off value (ANI 95–96% and dDDH 70%) for prokaryotic species delineation. On the basis of these results, strain WS-203<sup>T</sup> represents a novel species of the genus <i>Pelagibacterium</i>, for which the name <i>Pelagibacterium mangrovi</i> sp. nov. is proposed. The type strain is WS-203<sup>T</sup> (= GDMCC 1.4694<sup>T</sup> = KCTC 8652<sup>T</sup>).</p>

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A Novel Phosphorus-Recovering Bacterium Pelagibacterium mangrovi sp. nov., Isolated from Mangrove Sediment

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Shang Yang,
  • Guohong Liu,
  • Ruili Li,
  • Wei Yu,
  • Yuefei Huang,
  • Xiaofeng Wu,
  • Shungui Zhou,
  • Bing Li

摘要

An aerobic phosphorus-recovering strain, designated WS-203T, was isolated from mangrove sediment. Strain WS-203T showed the highest 16S rRNA gene sequence similarity to the type strain of Pelagibacterium lacus (98.1%). A phylogenetic tree based on 16S rRNA gene sequences indicated that strain WS-203T clustered with members of the genus Pelagibacterium. Growth of strain WS-203T was observed at 20–37 °C (optimum, 30 °C), pH 6.0–9.5 (optimum, pH 7.5) and with 0–9.0% (w/v) NaCl (optimum, 3.0%). Strain WS-203T contained Q-10 as the respiratory quinone and C18:1 ω6c/C18:1 ω7c and C19:0 ω8c cyclo as the major fatty acids. The polar lipids detected in the strain were diphosphatidylglycerol, phosphatidylglycerol, two unidentified phospholipids, two unidentified lipids and four unidentified glycolipids. The genomic DNA G + C content of strain WS-203T was 62.2%. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain WS-203T and the closely related Pelagibacterium lacus were 78.6% and 21.7%, respectively, which were lower than the cut-off value (ANI 95–96% and dDDH 70%) for prokaryotic species delineation. On the basis of these results, strain WS-203T represents a novel species of the genus Pelagibacterium, for which the name Pelagibacterium mangrovi sp. nov. is proposed. The type strain is WS-203T (= GDMCC 1.4694T = KCTC 8652T).