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<p>A novel Gram-stain-negative, aerobic, motile, rod-shaped, violacein-producing and floc-forming bacterium, designated strain PSY-7<sup>&#xa0;T</sup>, was isolated from the activated sludge of a municipal sewage treatment plant in Zhuhai, China. Strain PSY-7<sup>&#xa0;T</sup> clustered closely with the members of the genus <i>Chitinimonas</i>, which belongs to the family <i>Burkholderiaceae</i>, and showed the highest 16S rRNA gene sequence similarity to <i>Chitinimonas taiwanensis</i> cf<sup>T</sup> (96.84%). Growth occurred at 20–37&#xa0;°C (optimum, 30&#xa0;°C), at pH 5.0–10.5 (optimum, pH 7.0), and in the presence of 0–1% (w/v) NaCl (optimum, 0%). Chemotaxonomic analysis of strain PSY-7<sup>&#xa0;T</sup> indicated that the sole respiratory quinone was ubiquinone-8, the predominant cellular fatty acids were summed feature 3 (C<sub>16:1</sub> <i>ω7c</i> and/or C<sub>16:1</sub> <i>ω6c</i>) and C<sub>16:0</sub>, and the major polar lipids consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and several unknown polar lipids. On the basis of its phylogenetic, chemotaxonomic, and genotypic characteristics, strain PSY-7<sup>&#xa0;T</sup> represents a novel species of the genus <i>Chitinimonas</i>. <i>Chitinimonas violaceus</i> sp. nov. is proposed with the type strain PSY-7<sup>&#xa0;T</sup> (MCCC 1K10194<sup>T</sup> = KCTC 8263<sup>&#xa0;T</sup>). This study identifies activated sludge as a new ecological niche for the genus <i>Chitinimonas</i>.</p>

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Chitinimonas violaceus sp. nov., a violacein-producing and floc-forming bacterium isolated from the activated sludge of a municipal sewage treatment plant in Zhuhai, China

  • 期刊论文

  • 发表日期：

    2026年4月7日

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  • Yan Huang,
  • Yaqi Liu,
  • Ansi Jiang,
  • Yong Zhang,
  • Diao Jiao,
  • Xin Wang,
  • Wei Li,
  • Haiyan Zeng,
  • Dongru Qiu

摘要

A novel Gram-stain-negative, aerobic, motile, rod-shaped, violacein-producing and floc-forming bacterium, designated strain PSY-7 T, was isolated from the activated sludge of a municipal sewage treatment plant in Zhuhai, China. Strain PSY-7 T clustered closely with the members of the genus Chitinimonas, which belongs to the family Burkholderiaceae, and showed the highest 16S rRNA gene sequence similarity to Chitinimonas taiwanensis cfT (96.84%). Growth occurred at 20–37 °C (optimum, 30 °C), at pH 5.0–10.5 (optimum, pH 7.0), and in the presence of 0–1% (w/v) NaCl (optimum, 0%). Chemotaxonomic analysis of strain PSY-7 T indicated that the sole respiratory quinone was ubiquinone-8, the predominant cellular fatty acids were summed feature 3 (C16:1 ω7c and/or C16:1 ω6c) and C16:0, and the major polar lipids consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and several unknown polar lipids. On the basis of its phylogenetic, chemotaxonomic, and genotypic characteristics, strain PSY-7 T represents a novel species of the genus Chitinimonas. Chitinimonas violaceus sp. nov. is proposed with the type strain PSY-7 T (MCCC 1K10194T = KCTC 8263 T). This study identifies activated sludge as a new ecological niche for the genus Chitinimonas.