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<p>Strain SYSU M80003<sup>T</sup>, a Gram-stain-negative and aerobic bacterium, was isolated from water sample of the Pearl River Estuary, Guangzhou, Guangdong, PR China. The strain could grow at 4–37&#xa0;°C (optimal: 28&#xa0;°C), pH 6.0–8.0 (optimal: 7.0), and with 0–1% NaCl (w/v, optimal: 0%). The main fatty acids were anteiso-C<sub>14:0</sub>, Summed Feature 3 (C<sub>16:1</sub> <i>ω</i>7<i>c</i> and/or C<sub>16:1</sub> <i>ω</i>6<i>c</i>) and iso-C<sub>15:0</sub>. The predominant respiratory quinone was MK-6. The polar lipids contained phosphatidylethanolamine, three unidentified aminolipids, two unidentified aminophospholipids, and two unidentified polar lipids. The genomic DNA G + C content was 35.06%. Phylogenetic analysis based on the 16S rRNA gene revealed that strain SYSU M80003<sup>T</sup> was closely related to <i>Flavobacterium aquicola</i> JCM 30987<sup>&#xa0;T</sup> with similarity of 97.28%. Furthermore, the average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain SYSU M80003<sup>T</sup> and <i>F. aquicola</i> JCM 30987<sup>T</sup> were 83.8% and 28.1%, respectively. Based upon the consensus of phylogenetic and ANI analyses, we conclude that strain SYSU M80003<sup>T</sup> represents a novel species within the genus <i>Flavobacterium</i>, for which the name <i>Flavobacterium aestuarii</i> sp. nov. is proposed. The type strain is SYSU M80003<sup>T</sup> (= GDMCC 1.4521<sup>T</sup> = KCTC 102267<sup>T</sup>).</p>

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Flavobacterium aestuarii sp. nov., a novel species isolated from the Pearl River Estuary

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • Qi Li,
  • Zi-Qi Peng,
  • Hong-Chuan Wang,
  • Lei Dong,
  • Dan-Yuan Guo,
  • Pan-Deng Wang,
  • Xiao-Qing Luo,
  • Zhen-Hao Luo,
  • Zi-Wen Yang,
  • Wen-Jun Li

摘要

Strain SYSU M80003T, a Gram-stain-negative and aerobic bacterium, was isolated from water sample of the Pearl River Estuary, Guangzhou, Guangdong, PR China. The strain could grow at 4–37 °C (optimal: 28 °C), pH 6.0–8.0 (optimal: 7.0), and with 0–1% NaCl (w/v, optimal: 0%). The main fatty acids were anteiso-C14:0, Summed Feature 3 (C16:1 ω7c and/or C16:1 ω6c) and iso-C15:0. The predominant respiratory quinone was MK-6. The polar lipids contained phosphatidylethanolamine, three unidentified aminolipids, two unidentified aminophospholipids, and two unidentified polar lipids. The genomic DNA G + C content was 35.06%. Phylogenetic analysis based on the 16S rRNA gene revealed that strain SYSU M80003T was closely related to Flavobacterium aquicola JCM 30987 T with similarity of 97.28%. Furthermore, the average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain SYSU M80003T and F. aquicola JCM 30987T were 83.8% and 28.1%, respectively. Based upon the consensus of phylogenetic and ANI analyses, we conclude that strain SYSU M80003T represents a novel species within the genus Flavobacterium, for which the name Flavobacterium aestuarii sp. nov. is proposed. The type strain is SYSU M80003T (= GDMCC 1.4521T = KCTC 102267T).