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<p>A Gram-stain negative, facultative aerobic, rod-shaped and non-flagellated bacterium, designated strain OM2101<sup>T</sup>, was isolated from sargasso samples of Rongcheng Kelp Breeding Base in the Yellow Sea, PR China. Strain OM2101<sup>T</sup> grew at 10–30℃ (optimum at 25℃), pH 6.0-8.5 (optimum 6.5-7.0) with 0.5%-7% (w/v) NaCl (optimum with 0.5%). It hydrolyzed alginate and casein, but could not reduce nitrate to nitrite and hydrolyze gelatin and starch. Phylogenetic analysis based on 16&#xa0;S rRNA gene sequence revealed that strain OM2101<sup>T</sup> was affiliated with the genus <i>Bernardetia</i>, sharing the highest 16&#xa0;S rRNA gene sequence similarity (97.83%) with the type strain of <i>Bernardetia litoralis</i> and forming a distinct clade together with this <i>Bernardetia</i> species. The main cellular fatty acids of strain OM2101<sup>T</sup> were iso-C<sub>15:0</sub>, summed feature 9 (10-methy1-C<sub>16:0</sub> and/or iso-C<sub>17:1</sub>ω9c) and C<sub>16:0</sub>. Its polar lipids included phosphatidylethanolamine and four unidentified lipids. The dominant respiratory quinone was MK-7. The genomic DNA G + C content of strain OM2101<sup>T</sup> was 31.46%. Based on the phylogenetic, chemotaxonomic and phenotypic data obtained in this study, strain OM2101<sup>T</sup> is concluded to represent a novel species of the genus <i>Bernardetia</i>, for which the name <i>Bernardetia aquimarina</i> sp. nov. is proposed. The type strain is OM2101<sup>T</sup> (= MCCC 1K09367<sup>T</sup> = KCTC 102328<sup>T</sup>).</p>

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Bernardetia aquimarina sp. nov., Isolated from Sargasso Samples from the Yellow Sea

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Hai-Xia Zhu,
  • Shi-Ning Cai,
  • Ning-Hua Liu,
  • Zhi-Gang Tang,
  • Xue-Yun Geng,
  • Xiao-Yan Song,
  • Mei-Ling Sun,
  • Xi-Ying Zhang

摘要

A Gram-stain negative, facultative aerobic, rod-shaped and non-flagellated bacterium, designated strain OM2101T, was isolated from sargasso samples of Rongcheng Kelp Breeding Base in the Yellow Sea, PR China. Strain OM2101T grew at 10–30℃ (optimum at 25℃), pH 6.0-8.5 (optimum 6.5-7.0) with 0.5%-7% (w/v) NaCl (optimum with 0.5%). It hydrolyzed alginate and casein, but could not reduce nitrate to nitrite and hydrolyze gelatin and starch. Phylogenetic analysis based on 16 S rRNA gene sequence revealed that strain OM2101T was affiliated with the genus Bernardetia, sharing the highest 16 S rRNA gene sequence similarity (97.83%) with the type strain of Bernardetia litoralis and forming a distinct clade together with this Bernardetia species. The main cellular fatty acids of strain OM2101T were iso-C15:0, summed feature 9 (10-methy1-C16:0 and/or iso-C17:1ω9c) and C16:0. Its polar lipids included phosphatidylethanolamine and four unidentified lipids. The dominant respiratory quinone was MK-7. The genomic DNA G + C content of strain OM2101T was 31.46%. Based on the phylogenetic, chemotaxonomic and phenotypic data obtained in this study, strain OM2101T is concluded to represent a novel species of the genus Bernardetia, for which the name Bernardetia aquimarina sp. nov. is proposed. The type strain is OM2101T (= MCCC 1K09367T = KCTC 102328T).