Phytoactinopolyspora limicola sp. nov., an alkaliphilic actinomycete isolated from a soda alkali-saline soil

• DOI: 10.1007/s00203-020-02134-0
• Publication Date: 2021-01-02T06:02:52Z
• Authors: Wei Wei; Kaili Wang; Xinyu Hu; Sai Yang; Chunlin Zeng; Zhaozhi Hou; Shenkui Liu; Henglin Cui; Lin Zhu
• Keywords: DNA, Bacterial; 0301 basic medicine; Base Composition; Fatty Acids; Nucleic Acid Hybridization; Vitamin K 2; Sequence Analysis, DNA; 15. Life on land; Diaminopimelic Acid; Actinobacteria; Soil; 03 medical and health sciences; RNA, Ribosomal, 16S; Genome, Fungal; Sugars; Phospholipids; Phylogeny; Soil Microbiology

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).