Abstract
A novel actinobacterial strain, SB3-54T was isolated from rhizosphere soil of Cynanchum wilfodill, Jaecheon, Chungcheongbuk-do, Republic of Korea. Cells of strain SB3-54T were Gram-stain-positive, aerobic, rod-shaped, and flagellated which formed pale yellow colonies on Reasoner’s 2A (R2A) agar. Growth occurred at 15–30 °C (optimum 25 °C), pH 5–8 (optimum pH 7), and 0–2.5% NaCl (optimum 0%). Phylogenetic and phylogenomic analyses showed that strain SB3-54T formed a separate lineage in the genus Jatrophihabitans with Jatrophihabitans telluris N237T. Strain SB3-54T was positive for catalase activity. Genomic analysis showed that SB3-54T has plant-beneficial function contributing (referred to as PBFC) genes such as root colonization and plant protection from oxidative stress. Furthermore, genome of SB3-54T contained gene clusters related to cytokinin biosynthesis, auxin response, tryptophan biosynthesis, siderophore biosynthesis and bacterial toxin-antitoxin systems. Strain SB3-54T contained iso-C16:0 as the major fatty acid and MK-9(H4) and MK-9(H6) as the predominant quinones. The organism had meso-diaminopimelic acid as the diagnostic diamino acid in the peptidoglycan. The major polar lipids were diphosphatidylglycerol, phosphatidylinositol polymannosides, two unidentified aminoglycophospholipids and three unidentified phospholipids. Based on phylogenetic, physiological and chemotaxonomic characteristics, strain SB3-54T represents a novel species of the genus Jatrophihabitans. The type strain is SB3-54T (= KCTC 49134T = NBRC 114108T).
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Abbreviations
- GAP:
-
Good Agricultural Practice
- R2A:
-
Reasoner’s 2A
- TSA:
-
Tryptic soy agar
- NA:
-
Nutrient agar
- ANI:
-
Average nucleotide identity
- dDDH:
-
Digital DNA-DNA hybridization
- UBCG:
-
Up-to-date Bacterial Core Genes
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Acknowledgements
We thank Professor Bernhard Schink and Professor Aharon Oren for his advice in naming the novel strain.
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This work was supported by a grant from the Korea Research Institute of Bioscience & Biotechnology (KRIBB) Research Initiative Program.
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Strain SB3-54T was isolated by MKS. MKS, MKE, HSK, and HED did analysis including phenotypic properties and chemotaxonomic properties. MKS and J-SK analysed genome features and performed the motility tests. YKS collected and provided soil of rhizosphere sample. J-SL provided conceptual advice.
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Suh, M.K., Kim, JS., Eom, M.K. et al. Jatrophihabitans cynanchi sp. nov., isolated from rhizosphere soil of Cynanchum wilfordii. Antonie van Leeuwenhoek 117, 19 (2024). https://doi.org/10.1007/s10482-023-01902-4
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DOI: https://doi.org/10.1007/s10482-023-01902-4