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Abstract

Two Gram-stain-negative, motile with single polar flagellum, rod-shaped bacterial strains, named SJ-9 and SJ-92, were isolated from saline soils from Inner Mongolia, PR China. SJ-9 and SJ-92 grew at pH 6.5–10.0 and 7.0–11.0, 10–35 °C, and in the presence of 0–5 % and 0–8 % NaCl, respectively. Both strains were positive for oxidase, and negative for catalase. The results of phylogenetic analysis based on 16S rRNA gene sequences indicated that SJ-9 clustered with FR1330 (sharing 97.9 % 16S rRNA gene similarity), HB2 (96.5 %), ‘’ YD-1 (96.6 %), and CC-YY255 (95.1 %), and shared low 16S rRNA gene similarities (<97.0 %) with all the other type strains; while SJ-92 clustered with B9 (98.2 %), and shared low 16S rRNA gene similarities (<98.0 %) with all the other type strains. The two strains shared 97.4 % 16S rRNA gene similarity with each other. The major cellular fatty acids of both strains are iso-C and summed feature 9 (C 10-methyl and/or iso-Cω9). The major polar lipids of both strains are diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The only respiratory quinone for both strains is ubiquinone-8 (Q-8). The genomic DNA G+C contents are 69.3 and 70.4 mol%, respectively. The digital DNA–DNA hybridization (dDDH) and average nucleotide identity by (ANIb) values between the two strains were 22.6 and 77.5 %, while the values between SJ-9 and ‘’ YD-1, FR1330, and HB2 were 38.1, 39.2, and 21.9 %, and 82.5, 84.4, and 78.5 %, while those between SJ-92 and B9 were 21.3 and 76.7 %. On the basis of the phenotypic, physiological and phylogenetic results, SJ-9 and SJ-92 represent two novel species of the genus , for which the names [type stain SJ-9 (=CGMCC 1.17377=KCTC 82248)] and [type strain SJ-92 (=CGMCC 1.17695=KCTC 82208)] are proposed.

Funding
This study was supported by the:
  • Natural Science Foundation of Inner Mongolia (Award 2021MS03031)
    • Principle Award Recipient: Ji-QuanSun
  • Inner Mongolia Science & Technology Plan (Award 2020GG0034)
    • Principle Award Recipient: Ji-QuanSun
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/content/journal/ijsem/10.1099/ijsem.0.005334
2022-04-26
2024-07-21
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