1887

Abstract

A 1-aminocyclopropane-1-carboxylate (ACC) deaminase-producing, Gram-stain-negative, strictly aerobic, non-motile, yellow-reddish, oval-shaped bacterial strain, designated M5D2P5, was isolated from a root of , in Tumd Right Banner, Inner Mongolia, PR China. M5D2P5 grew at 10–40 °C (optimum 30–35 °C), pH 5.0–10.0 (optimum pH 8.0) and with 0–7% NaCl (optimum 3.0 %). The strain was positive for catalase and oxidase. The phylogenetic trees based on 16S rRNA gene sequences indicated that M5D2P5 clustered with JL1095, and shared 98.0, 97.3, 97.2, 96.9 and less than 96.9 % 16S rRNA gene similarities to JL1095, B2012, PTG4-2, J103, and all the other type strains, respectively. However, the phylogenomic tree showed it clustered with J103. M5D2P5 contained Q-10 as the major respiratory quinone, as well as two minor respiratory quinones, Q-7 and Q-8. Its major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, an unidentified phospholipid, an unidentified glycolipid, and four unidentified lipids. The genomic DNA G+C content was 66.5 %. The digital DNA–DNA hybridization score and the average nucleotide identity based on values of M5D2P5 to JL1095, J103, B2012, and PTG4-2, were 20.8, 23.7, 20.7, and 21.5 %, and 73.3, 79.5, 74.4, and 73.7 %, respectively. The phylogenetic and phenotypic characteristics allowed the discrimination of M5D2P5 from its phylogenetic relatives. The novel species sp. nov. is therefore proposed, and the type strain is M5D2P5 (=CGMCC 1.19149=KCTC 92132).

Funding
This study was supported by the:
  • Inner Mongolia University (Award 21800-5185133)
    • Principle Award Recipient: Ji-QuanSun
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2022-10-17
2024-02-27
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