Pseudomonas viciae sp. nov., isolated from rhizosphere of broad bean

A Gram-stain-negative aerobic bacterium, strain 11K1^T, was isolated from a rhizosphere soil of broad bean collected from Qujing, Yunnan, PR China and characterized by using polyphasic taxonomy. The bacterial cells of strain 11K1^T were rod-shaped, motile by two polar flagella and positive for oxidase and catalase. Results of phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain had the highest similarities to Pseudomonas thivervalensis DSM 13194^T (99.52 %), Pseudomonas lini CFBP 5737^T (99.45 %), Pseudomonas chlororaphis subsp. chlororaphis NBRC 3904^T (99.31 %), Pseudomonas kilonensis DSM 13647^T (99.25 %) and Pseudomonas brassicacearum JCM11938^T (99.24 %). Multilocus sequence analysis using the 16S rRNA, gyrB, rpoB and rpoD gene sequences demonstrated that strain 11K1^T was a member of the Pseudomonas corrugata subgroup within the Pseudomonas fluorescens lineage, but was distant from all closely related species. The average nucleotide identity and in silico DNA-DNA hybridization values were lower than recommended thresholds of 95 and 70 %, respectively, for species delineation. The major isoprenoid quinone of strain 11K1^T was ubiquinone (Q-9) and the major cellular fatty acids were C_16 : 0, summed feature 3 (C_16 : 1 ω7c/C_16 : 1 ω6c), summed feature 8 (C_18 : 1 ω7c/C_18 : 1 ω6c) and C_17 : 0 cyclo. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, aminophospholipid and two unidentified lipids. Based on the results of phenotypic characterization, phylogenetic analysis and genome comparison, strain 11K1^T represents a novel species of the genus Pseudomonas, for which the name Pseudomonas viciae sp. nov. is proposed. The type strain is 11K1^T (=GDMCC 1.1743^T=KACC 21650^T).

Pseudomonas yangonensis sp. nov., isolated from wound samples of patients in a hospital in Myanmar

Strains of a Gram-negative, aerobic, rod-shaped, non-spore-forming bacterium, designated MY50^T, MY63 and MY101, were isolated from wound samples of three hospitalized patients in Yangon, Myanmar. Strains MY50^T, MY63 and MY101 grew at temperatures of 4-44 °C, in media containing 1.0-7.0 % (w/v) NaCl and at pH 6.0-9.5. Phylogenetic analysis based on 16S rRNA gene and whole genome sequences showed that these strains belonged to the genus Pseudomonas and were part of the Pseudomonas oleovorans group and located close to Pseudomonas guguanensis and Pseudomonas mendocina. Whole-genome comparisons, using average nucleotide identity and digital DNA-DNA hybridization analyses, confirmed that strains MY50^T, MY63 and MY101 were the same strain and they were a distinct species in the P. oleovorans group. Results of phenotypic characterization tests demonstrated that utilization of p-hydroxy-phenylacetic acid, glycerol, l-pyroglutamic acid and quinic acid could distinguish these strains from other species of the P. oleovorans group. These genetic and phenotypic characteristics suggest that they should be classified as representing a novel species, under the proposed name Pseudomonas yangonensis sp. nov. The type strain is MY50^T (=LMG 31602^T,=JCM 33396^T), with a DNA G+C content of 62.82 mol%.