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<p>A yellow, Gram-negative staining, and presenting gliding motility strain designated as T-16<sup>&#xa0;T</sup> was isolated from decanting water samples used for Atlantic salmon (<i>Salmo salar</i>) smolt rearing in Chile. Phylogenetic analysis based on 16S rRNA sequences showed that strain T-16<sup>&#xa0;T</sup> belonged to the genus <i>Flavobacterium</i> and was closely related to <i>F. tiangeerense</i> CGMCC 1.6847<sup>&#xa0;T</sup> (98.64%), <i>F. bizetiae</i> CIP 105534&#xa0;T (98.62%), <i>F. frigoritolerans</i> LS1R47<sup>T</sup> (98.33%), and <i>F. commune</i> PK15<sup>T</sup> (98.10%). Genome comparison grouped the strain with <i>F. tiangeerense</i> CGMCC 1.6847<sup>&#xa0;T</sup> (92.73%), <i>F. erciyesense</i> F-328<sup>&#xa0;T</sup> (87.22%), and <i>F. turcicum</i> F-339<sup>&#xa0;T</sup> (87.22%). Regarding phenotypical traits, the strain showed optimal growth between 18 and 25&#xa0;°C, pH 7.0, and with no NaCl addition to culture media. The major fatty acids were iso-C<sub>15:0</sub> and C<sub>16:1</sub>ω7<i>c</i>/C<sub>16:1</sub>ω6<i>c</i> (summed feature 3). The polar lipids detected were as follows: six aminolipids, three unidentified lipids, one phosphatidylethanolamine, and one glycolipid. The predominant menaquinones were MK-6 (97.4%) and MK-5 (2.6%). The genomic G+C content was 33.5%. The average nucleotide identity values were <i>F. tiangeerense</i> CGMCC 1.6847<sup>&#xa0;T</sup> with 91.75%, <i>F. turcicum</i> F-339<sup>&#xa0;T</sup> with 78.85%, and <i>F. muglaense</i> F-60<sup>&#xa0;T</sup> with 74.82%. Based on the results of the different analyses and the differences found with the closest related species, strain T-16<sup>&#xa0;T</sup> (= CECT 30411<sup>&#xa0;T</sup> = RGM 3224<sup>&#xa0;T</sup>) is proposed as representative of a new bacterial species <i>Flavobacterium maulense</i> sp. nov.</p>

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Flavobacterium maulense sp. nov. isolated from water samples culturing Atlantic salmon (Salmo salar) in Chile

  • 期刊论文

  • 发表日期：

    2026年3月26日

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  • Ruben Avendaño-Herrera,
  • Rute Irgang,
  • Mónica Saldarriaga-Córdoba

摘要

A yellow, Gram-negative staining, and presenting gliding motility strain designated as T-16 T was isolated from decanting water samples used for Atlantic salmon (Salmo salar) smolt rearing in Chile. Phylogenetic analysis based on 16S rRNA sequences showed that strain T-16 T belonged to the genus Flavobacterium and was closely related to F. tiangeerense CGMCC 1.6847 T (98.64%), F. bizetiae CIP 105534 T (98.62%), F. frigoritolerans LS1R47T (98.33%), and F. commune PK15T (98.10%). Genome comparison grouped the strain with F. tiangeerense CGMCC 1.6847 T (92.73%), F. erciyesense F-328 T (87.22%), and F. turcicum F-339 T (87.22%). Regarding phenotypical traits, the strain showed optimal growth between 18 and 25 °C, pH 7.0, and with no NaCl addition to culture media. The major fatty acids were iso-C15:0 and C16:1ω7c/C16:1ω6c (summed feature 3). The polar lipids detected were as follows: six aminolipids, three unidentified lipids, one phosphatidylethanolamine, and one glycolipid. The predominant menaquinones were MK-6 (97.4%) and MK-5 (2.6%). The genomic G+C content was 33.5%. The average nucleotide identity values were F. tiangeerense CGMCC 1.6847 T with 91.75%, F. turcicum F-339 T with 78.85%, and F. muglaense F-60 T with 74.82%. Based on the results of the different analyses and the differences found with the closest related species, strain T-16 T (= CECT 30411 T = RGM 3224 T) is proposed as representative of a new bacterial species Flavobacterium maulense sp. nov.