Abstract
An aerobic, Gram-stain-negative, motile rod bacterium, designated as SYSU BS000021T, was isolated from a black soil sample in Harbin, Heilongjiang province, China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolate belongs to the genus Methylobacterium, and showed the highest sequence similarity to Methylobacterium segetis KCTC 62267 T (98.51%) and Methylobacterium oxalidis DSM 24028 T (97.79%). Growth occurred at 20–37℃ (optimum, 28 °C), pH 6.0–8.0 (optimum, pH 7.0) and in the presence of 0% (w/v) NaCl. Polar lipids comprised of phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, one unidentified aminolipid and one unidentified polar lipid. The major cellular fatty acids (> 5%) were C18:0 and C18:1 ω7c and/or C18:1 ω6c. The predominant respiratory quinone was Q-10. The genomic G + C content was 68.36% based on the whole genome analysis. The average nucleotide identity (≤ 83.5%) and digital DNA–DNA hybridization (≤ 27.3%) values between strain SYSU BS000021T and other members of the genus Methylobacterium were all lower than the threshold values recommended for distinguishing novel prokaryotic species. Based on the results of phenotypic, chemotaxonomic and phylogenetic analyses, strain SYSU BS000021T represents a novel species of the genus Methylobacterium, for which the name Methylobacterium nigriterrae sp. nov. is proposed. The type strain of the proposed novel species is SYSU BS000021T (= GDMCC 1.3814 T = KCTC 8051 T).
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Data availability
The 16S rRNA gene sequences of strain SYSU BS000021T has been deposited in GenBank under the accession number PP380194. Whole Genome Shotgun project of strain SYSU BS000021T has been deposited at DDBJ/ENA/GenBank under accession number JBAWTG000000000. The genome raw data of strain SYSU BS000021T has been deposited in GenBank under the accession number SRR28216103. Four supplementary tables and four supplementary figures are included on the online supplementary file.
Abbreviations
- ANI:
-
Average nucleotide identity
- dDDH:
-
Digital DNA–DNA hybridization
- ML:
-
Maximum-likelihood
- MP:
-
Maximum-parsimony
- NJ:
-
Neighbour-joining
- R2A:
-
Reasoner’s 2A
- PC:
-
Phosphatidylcholine
- PE:
-
Phosphatidylethanolamine
- PG:
-
Phosphatidylglycerol
- DPG:
-
Diphosphatidylglycerol
- AL:
-
Aminolipid
- L:
-
Polar lipid
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Acknowledgements
The authors are grateful to Prof. Aharon Oren (The Hebrew University of Jerusalem, Israel) for helping with the etymology.
Funding
This research was supported by the National Key Research and Development Program of China (2021YFD1500300) and the National Science and Technology Fundamental Resources Investigation Program of China (2021FY100900). WJL and SW were also supported by Introduction project of high-level talents in Xinjiang Uygur Autonomous Region.
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WJL, SW, JYJ designed the research and project outline. YTOY isolated the bacterium. LL and TTS performed the genomic data analysis. LBC, YW, JYX, PJJ, RRH, and WYP performed the deposition, physiological and chemotaxonomic experiments. LBC drafted the manuscript. All authors have read and approved the final version of the manuscript.
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Chen, LB., OuYang, YT., Liu, L. et al. Methylobacterium nigriterrae sp. nov., isolated from black soil. Antonie van Leeuwenhoek 117, 83 (2024). https://doi.org/10.1007/s10482-024-01981-x
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DOI: https://doi.org/10.1007/s10482-024-01981-x