<i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments
Two novel marine hydrogen- and sulfur-oxidizing bacteria, designated HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup>, were isolated from mangrove sediments from Fujian Province, China. Strain HSL1-7<sup>T</sup> exhibited Gram-negative, rod-shaped to slightly curved morp...
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2025-03-01
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| author | Yangsheng Zhong Yufei Li Zhaodi Wang Liang Cui Shiwei Lv Han Zhu Qing Yuan Qiliang Lai Shasha Wang Lijing Jiang |
| author_facet | Yangsheng Zhong Yufei Li Zhaodi Wang Liang Cui Shiwei Lv Han Zhu Qing Yuan Qiliang Lai Shasha Wang Lijing Jiang |
| author_sort | Yangsheng Zhong |
| collection | DOAJ |
| description | Two novel marine hydrogen- and sulfur-oxidizing bacteria, designated HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup>, were isolated from mangrove sediments from Fujian Province, China. Strain HSL1-7<sup>T</sup> exhibited Gram-negative, rod-shaped to slightly curved morphology with polar flagellum-driven motility, whereas strain HSL3-1<sup>T</sup> was Gram-negative, rod-shaped and non-motile. Strain HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> were obligate chemolithoautotrophs, capable of using molecular hydrogen and thiosulfate as an energy source, and molecular oxygen and elemental sulfur as the electron acceptors for growth. Cellular fatty acid profiles revealed similar predominant components (C<sub>16:1</sub><i>ω7c</i>, C<sub>16:0</sub>, C<sub>18:1</sub><i>ω7c</i>, and C<sub>14:0</sub>) in both strains. Strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> were strongly diazotrophic, as demonstrated by <sup>15</sup>N<sub>2</sub> fixation when a fixed nitrogen source was absent from the growth medium. The DNA G+C contents of strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> were determined to be 36.1% and 57.3%, respectively. Based on the 16S rRNA gene sequences, strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> exhibited the highest sequence similarities with <i>Sulfurimonas marina</i> B2<sup>T</sup> (98.5% and 94.45%, respectively). Notably, the 16S rRNA gene sequence similarity between strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> was 93.19%, indicating that they represent distinct species within the genus <i>Sulfurimonas</i>. Comparative genomic analyses revealed the presence of diverse metabolic profiles in strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup>, including carbon fixation, hydrogen oxidation, sulfur oxidation, and nitrogen fixation. The combined phenotypic, chemotaxonomic, and phylogenetic evidence, including average nucleotide identity and in silico DNA-DNA hybridization values, shows that strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> represent two novel species of the genus <i>Sulfurimonas</i> for which the names <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov. are proposed, with the type strains HSL1-7<sup>T</sup> (=MCCC 1A18899<sup>T</sup> = KCTC 25640<sup>T</sup>) and HSL3-1<sup>T</sup> (=MCCC 1A18844<sup>T</sup>), respectively. |
| format | Article |
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| institution | OA Journals |
| issn | 2076-2607 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Microorganisms |
| spelling | doaj-art-676aff77bc4e4e50904cecfaa08fc0c42025-08-20T02:18:14ZengMDPI AGMicroorganisms2076-26072025-03-0113471310.3390/microorganisms13040713<i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove SedimentsYangsheng Zhong0Yufei Li1Zhaodi Wang2Liang Cui3Shiwei Lv4Han Zhu5Qing Yuan6Qiliang Lai7Shasha Wang8Lijing Jiang9Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaKey Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of PR China, Xiamen 361005, ChinaTwo novel marine hydrogen- and sulfur-oxidizing bacteria, designated HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup>, were isolated from mangrove sediments from Fujian Province, China. Strain HSL1-7<sup>T</sup> exhibited Gram-negative, rod-shaped to slightly curved morphology with polar flagellum-driven motility, whereas strain HSL3-1<sup>T</sup> was Gram-negative, rod-shaped and non-motile. Strain HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> were obligate chemolithoautotrophs, capable of using molecular hydrogen and thiosulfate as an energy source, and molecular oxygen and elemental sulfur as the electron acceptors for growth. Cellular fatty acid profiles revealed similar predominant components (C<sub>16:1</sub><i>ω7c</i>, C<sub>16:0</sub>, C<sub>18:1</sub><i>ω7c</i>, and C<sub>14:0</sub>) in both strains. Strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> were strongly diazotrophic, as demonstrated by <sup>15</sup>N<sub>2</sub> fixation when a fixed nitrogen source was absent from the growth medium. The DNA G+C contents of strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> were determined to be 36.1% and 57.3%, respectively. Based on the 16S rRNA gene sequences, strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> exhibited the highest sequence similarities with <i>Sulfurimonas marina</i> B2<sup>T</sup> (98.5% and 94.45%, respectively). Notably, the 16S rRNA gene sequence similarity between strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> was 93.19%, indicating that they represent distinct species within the genus <i>Sulfurimonas</i>. Comparative genomic analyses revealed the presence of diverse metabolic profiles in strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup>, including carbon fixation, hydrogen oxidation, sulfur oxidation, and nitrogen fixation. The combined phenotypic, chemotaxonomic, and phylogenetic evidence, including average nucleotide identity and in silico DNA-DNA hybridization values, shows that strains HSL1-7<sup>T</sup> and HSL3-1<sup>T</sup> represent two novel species of the genus <i>Sulfurimonas</i> for which the names <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov. are proposed, with the type strains HSL1-7<sup>T</sup> (=MCCC 1A18899<sup>T</sup> = KCTC 25640<sup>T</sup>) and HSL3-1<sup>T</sup> (=MCCC 1A18844<sup>T</sup>), respectively.https://www.mdpi.com/2076-2607/13/4/713<i>Sulfurimonas microaerophilic</i> HSL1-7<sup>T</sup><i>Sulfurimonas diazotrophicus</i> HSL3-1<sup>T</sup>chemolithoautotrophhydrogen oxidationsulfur oxidationnitrogen fixation |
| spellingShingle | Yangsheng Zhong Yufei Li Zhaodi Wang Liang Cui Shiwei Lv Han Zhu Qing Yuan Qiliang Lai Shasha Wang Lijing Jiang <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments Microorganisms <i>Sulfurimonas microaerophilic</i> HSL1-7<sup>T</sup> <i>Sulfurimonas diazotrophicus</i> HSL3-1<sup>T</sup> chemolithoautotroph hydrogen oxidation sulfur oxidation nitrogen fixation |
| title | <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments |
| title_full | <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments |
| title_fullStr | <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments |
| title_full_unstemmed | <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments |
| title_short | <i>Sulfurimonas microaerophilic</i> sp. nov. and <i>Sulfurimonas diazotrophicus</i> sp. nov.: Two Novel Nitrogen-Fixing and Hydrogen- and Sulfur-Oxidizing Chemolithoautotrophs Within the <i>Campylobacteria</i> Isolated from Mangrove Sediments |
| title_sort | i sulfurimonas microaerophilic i sp nov and i sulfurimonas diazotrophicus i sp nov two novel nitrogen fixing and hydrogen and sulfur oxidizing chemolithoautotrophs within the i campylobacteria i isolated from mangrove sediments |
| topic | <i>Sulfurimonas microaerophilic</i> HSL1-7<sup>T</sup> <i>Sulfurimonas diazotrophicus</i> HSL3-1<sup>T</sup> chemolithoautotroph hydrogen oxidation sulfur oxidation nitrogen fixation |
| url | https://www.mdpi.com/2076-2607/13/4/713 |
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