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  • Title: Pseudomonas lalkuanensis sp. nov., isolated from a bacterial consortia of contaminated soil enriched for the remediation of e-waste.
    Author: Thorat V, Kirdat K, Tiwarekar B, DaCosta E, Debbarma P, Shouche Y, Sathe S, Goel R, Lodha T, Yadav A.
    Journal: Int J Syst Evol Microbiol; 2020 Dec; 70(12):6468-6475. PubMed ID: 33174829.
    Abstract:
    A novel e-waste-degrading strain, PE08T, was isolated from contaminated soil collected from a paper mill yard in Lalkuan, Uttarakhand, India. Strain PE08T was Gram-stain-negative, rod-shaped, aerobic, oxidase-positive and catalase-positive. Optimum growth was observed at 30 °C (range, 5-40 °C), with 1-2 % NaCl (range, 0-3 %) and at pH 7 (range 6-11). The phylogeny based on 16S rRNA gene sequences delineated strain PE08T to the genus Pseudomonas and showed highest sequence similarity to Pseudomonas furukawaii KF707T (98.70 %), followed by Pseudomonas aeruginosa DSM 50071T (98.62 %) and Pseudomonas resinovorans DSM 21078T (97.93 %). The genome of strain PE08T was sequenced and had one scaffold of 6056953 bp, 99.84 % completeness and 182× coverage were obtained. The G+C content in the genome was 64.24 mol%. The DNA-DNA hybridization and average nucleotide identity values between strain PE08T and its closely related type strain, P. resinovorans DSM 21078T were below 34.8 % and 87.96 %, respectively. The phylogenetic analysis based on whole-genome sequence and concatenated GyrB and RpoB proteins revealed that strain PE08T forms a district clade in the family Pseudomonadaceae. The predominant fatty acids were summed feature 8 (C18 :  1ω7c and/or C18 :1 ω6c), summed feature 3 (C16 :  1ω7c and/or C16 :  1ω6c), C16 : 0 and C12 : 0. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The phenotypic, chemotaxonomic and genetic analysis, including overall genome relatedness index values, indicated that strain PE08T represents a novel species of the genus Pseudomonas, for which the name Pseudomonas lalkuanensis sp. nov. is proposed. The type strain is PE08T (=MCC 3792=KCTC 72454=CCUG 73691).
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