Pseudomonas hutmensis sp. nov., a New Fluorescent Member of Pseudomonas putida Group
2019
Xiang, Wei | Chen, Shaowen | Tian, Daizhi | Huang, Chunhua | Gao, Tiexiang
A rod-shaped, Gram-negative and aerobic bacterium, strain XWS2, was isolated from rhizosphere soil of a camphor tree in Hubei University of Chinese Medicine Huangjiahu Campus, Wuhan, China. Cells grew at 4–37 °C (optimum 28 °C), pH 5.0–9.0 (optimum 7.0) and with 0–5% NaCl (optimum 1%). Colonies growing on tryptone soybean agar are round, beige in color and approximately 2 mm in diameter after 24 h incubation at 28 °C. Pellicle formation during liquid culture and strong fluorescent pigment production on King’s B medium are typical features of strain XWS2. The genome of XWS2 is 6,170,117 bp, containing 5682 predicted genes and 4770 genes are functionally annotated. Phylogenetic analysis based on 16S rRNA sequence showed that strain XWS2 formed an independent branch within the Pseudomonas putida group, with P. putida NBRC 14164ᵀ (99.86% similarity) and P. alkylphenolica KL28ᵀ (99.36% similarity) as the most closely related type strains. Genome sequence analysis based on average nucleotide identity and digital DNA–DNA hybridization are below the threshold values for species delineation. Phenotypic characteristics, physiological and biochemical tests also supported the strain represents a separate novel species within the Pseudomonas genus. The name Pseudomonas hutmensis sp. nov. is proposed, with type strain XWS2ᵀ (= CCTCC AB 2018189 ᵀ = KACC 19898ᵀ).
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