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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 74, Issue 4

sp. nov. and sp. nov., isolated from seawater of the Yellow Sea No Access

Abstract

Two novel Gram-stain-negative, aerobic, non-motile and rod-shaped bacteria, designated as WL0004 and XHP0148, were isolated from seawater samples collected from the coastal areas of Nantong and Lianyungang, PR China, respectively. Both strains were found to grow at 10–42 °C (optimum, 37 °C) and with 2.0–5.0 % (w/v) NaCl (optimum, 3.0 %). Strain WL0004 grew at pH 6.0–9.0 (optimum, pH 7.0–8.0), while XHP0148 grew at pH 6.0–10.0 (optimum, pH 7.0–8.0). The major cellular fatty acids (>10 %) of both strains included summed feature 8 (C 6 and/or C 7). In addition, strain WL0004 contained 11-methyl C 7 and strain XHP0148 contained C 3-OH. The respiratory quinone of both strains was ubiquinone-10. The G+C content of genomic DNA of strains WL0004 and XHP0148 were 62.5 and 63.0 mol%, respectively. Strains WL0004 and XHP0148 showed the highest 16S rRNA gene sequence similarity to DSS-3 (99.4 and 99.0 %, respectively), and the 16S rRNA gene-based phylogenetic analysis indicated that the two strains were closely related to members of the genus . The average nucleotide identity and digital DNA–DNA hybridization values among the two strains and type strains of the genus were all below 95 and 70 %, respectively, and the phylogenetic tree reconstructed from the bac120 gene set indicated that the two strains are distinct from each other and the members of the genus . Based on this phenotypic and genotypic characterization, strains WL0004 (=MCCC 1K07523=JCM 35565=GDMCC 1.3083) and XHP0148 (=MCCC 1K07543=JCM 35569=GDMCC 1.3089) should be recognized as representing two novel species of the genus and the names sp. nov. and sp. nov. are proposed, respectively.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): EasyCGTree , novel species , Roseobacteraceae , Ruegeria and seawater
Funding
This study was supported by the:
  • Innovation Project for Marine Science and Technology of Jiangsu Province (Award No. JSZRHYKJ202209)
    • Principle Award Recipient: Dao-FengZhang
  • National Natural Science Foundation of China (Award No. 31900001)
    • Principle Award Recipient: Dao-FengZhang
© 2024 The Authors
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2024-04-03
2025-01-26
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Ruegeria marisflavi sp. nov. and Ruegeria aquimaris sp. nov., isolated from seawater of the Yellow Sea
Int J Syst Evol Microbiol 74, 006323 (2024); https://doi.org/10.1099/ijsem.0.006323
/content/journal/ijsem/10.1099/ijsem.0.006323
/content/journal/ijsem/10.1099/ijsem.0.006323
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