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  • Title: Pseudomonas nicosulfuronedens sp. nov., a nicosulfuron degrading bacterium, isolated from a microbial consortium.
    Author: Li M, Ma Q, Kong D, Han X, Che J, Zhou Y, Jiang X, Ruan Z, Zhang Q.
    Journal: Int J Syst Evol Microbiol; 2021 Feb; 71(2):. PubMed ID: 33411665.
    Abstract:
    A Gram-stain-negative, aerobic, motile, short-rod-shaped bacterium with nicosulfuron-degrading ability, designated strain LAM1902T, was isolated from a microbial consortium enriched with nicosulfuron as a sole nitrogen and energy source. The optimal temperature and pH for growth of strain LAM1902T were 30 °C and pH 6.0, respectively. Strain LAM1902T could grow in the presence of NaCl with concentration up to 4.0 % (w/v). Comparative analysis of 16S rRNA gene sequences revealed that LAM1902T was closely related to the members of the family Pseudomonadaceae to the genus Pseudomonas, with the highest similarity to Pseudomonas nitroreducens DSM 14399T (99.6 %), Pseudomonas nitritireducens WZBFD3-5A2T (99.3 %) and Pseudomonas panipatensis Esp-1T (98.8 %). Multi-locus sequence analysis based on both concatenated sequences of the 16S rRNA gene and three housekeeping genes (gyrB, rpoB and rpoD) further confirmed the intrageneric phylogenetic position of strain LAM1902T. The genomic DNA G+C content of LAM1902T was 64.8 mol%. The low values of in silico DNA-DNA hybridization (less than 43.7 %) and average nucleotide identity (less than 90.9 %) also showed that the strain was distinctly different from known species of the genus Pseudomonas. The major fatty acids were C16 : 0, C17 : 0 cyclo and anteiso C15 : 0. Ubiquinone Q-9 was detected as the predorminant respiratory quinone. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and aminophospholipid. Based on phylogenetic, phenotypic and chemotaxonomic analyses and genome comparisons, we conclude that strain LAM1902T represents a novel species, for which the name Pseudomonas nicosulfuronedens sp. nov. is proposed. The type strain is LAM1902T (=JCM 33860T=KCTC 72830T).
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