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  • Title: Ramlibacter pinisoli sp. nov., a novel bacterial species isolated from pine garden soil.
    Author: Akter S, N A M K, Lee SY, Moon SK, Choi C, Balusamy SR, Siddiqi MZ, Ashrafudoulla M, Rahman MS, Huq MA.
    Journal: Int J Syst Evol Microbiol; 2020 Nov; 70(11):5841-5847. PubMed ID: 32965207.
    Abstract:
    A Gram-stain-negative, aerobic, non-motile and rod- or coccoid-shaped novel bacterial strain, designated MAH-25T, was isolated from soil sampled in a pine garden. The colonies were observed to be light pink-coloured, smooth, spherical and 1-2 mm in diameter when grown on nutrient agar for 2 days. Strain MAH-25T was found to be able to grow at 15-35 °C, at pH 5.0-8.0 and at 0-2.0 % NaCl. Cell growth occurred on Reasoner's 2A agar and nutrient agar. The strain was found to be positive in both oxidase and catalase tests. According to 16S rRNA gene sequence comparisons, the isolate was identified as a member of the genus Ramlibacter and closely related to Ramlibacter solisilvae 5-10T (98.0 % similarity), Ramlibacter henchirensis TMB834T (97.7 %), Ramlibacter tataouinensis TTB310T (97.6 %) and Ramlibacter rhizophilus YS3.2.7T (97.3 %). The average nucleotide identity and digital DNA-DNA hybridization values between strain MAH-25T and the four closely related type strains were in the range of 78.8-81.3 % and 22.3-24.1 %, respectively. The novel strain MAH-25T has a draft genome size of 5 505 957 bp (11 contigs), annotated with 5210 protein-coding genes, 46 tRNA and three rRNA genes. The genomic DNA G+C content was determined to be 70.3 mol%. The predominant isoprenoid quinone was ubiquinone 8 (Q-8). The major fatty acids were identified as C16 : 0, summed feature 3 (C16 : 1  ω7c and/or C16 : 1  ω6c) and summed feature 8 (C18 : 1  ω7c and/or C18 : 1  ω6c). The main polar lipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. On the basis of DNA-DNA hybridization, genotypic analysis, chemotaxonomic and physiological data, strain MAH-25T represents a novel species within the genus Ramlibacter, for which the name Ramlibacter pinisoli sp. nov. is proposed, with MAH-25T (=KACC 19839T=CGMCC1.13660T) as the type strain.
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