Abstract
An alkaliphilic actinomycete, designated HAJB-30 T, was isolated from a soda alkali-saline soil in Heilongjiang, Northeast China. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain HAJB-30 T was most closely related to type strains of the genus Phytoactinopolyspora with sequence similarities ranging between 93.5 and 98.9%. Strain HAJB-30 T grew at pH 8.0–11.0 (optimum pH 9.5–10.0) and in the presence of 0–7.0% NaCl (optimum 1.0–3.0%). Whole-cell hydrolysates of the isolate contained LL-diaminopimelic acid as the diagnostic diamino acid and mannose and rhamnose as diagnostic sugars. The major fatty acids identified were iso-C14:0, iso-C15:0, anteiso-C15:0, iso-C16:0 and anteiso-C17:0, while the menaquinone was MK-9(H4). The genome (6,589,901 bp), composed of 50 contigs, had a G + C content of 66.8%. Out of the 6074 predicted genes, 6020 were protein-coding genes, and 54 were ncRNAs. Digital DNA–DNA hybridization (dDDH) estimation and average nucleotide identity (ANI) of strain HAJB-30 T against genomes of the type strains of related species in the same family ranged between 19.7 and 22.0% and between 71.5 and 76.8%, respectively. From these results, it was concluded that strain HAJB-30 T possesses sufficient characteristics differentiated from all recognized Phytoactinopolyspora species, it is considered to be a novel species for which the name Phytoactinopolyspora limicola sp. nov. is proposed. The type strain is HAJB-30 T (= CGMCC 4.7591 T, = JCM 33694 T).
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (31770543, 41503068, 31600069), Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD-2018-87), and Initial Scientific Research Fund of Senior Talents in Jiangsu University (15JDG016, 15JDG018).
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Wei, W., Wang, K., Hu, X. et al. Phytoactinopolyspora limicola sp. nov., an alkaliphilic actinomycete isolated from a soda alkali-saline soil. Arch Microbiol 203, 1367–1374 (2021). https://doi.org/10.1007/s00203-020-02134-0
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DOI: https://doi.org/10.1007/s00203-020-02134-0