scholarly journals Proposal to rename Carnobacterium inhibens as Carnobacterium inhibens subsp. inhibens subsp. nov. and description of Carnobacterium inhibens subsp. gilichinskyi subsp. nov., a psychrotolerant bacterium isolated from Siberian permafrost

2015 ◽  
Vol 65 (Pt_2) ◽  
pp. 556-561 ◽  
Author(s):  
Wayne L. Nicholson ◽  
Kateryna Zhalnina ◽  
Rafael R. de Oliveira ◽  
Eric W. Triplett

A novel, psychrotolerant facultative anaerobe, strain WN1359T, was isolated from a permafrost borehole sample collected at the right bank of the Kolyma River in Siberia, Russia. Gram-positive-staining, non-motile, rod-shaped cells were observed with sizes of 1–2 µm long and 0.4–0.5 µm wide. Growth occurred in the range of pH 5.8–9.0 with optimal growth at pH 7.8–8.6 (pH optimum 8.2). The novel isolate grew at temperatures from 0–37 °C and optimal growth occurred at 25 °C. The novel isolate does not require NaCl; growth was observed between 0 and 8.8 % (1.5 M) NaCl with optimal growth at 0.5 % (w/v) NaCl. The isolate was a catalase-negative, facultatively anaerobic chemo-organoheterotroph that used sugars but not several single amino acids or dipeptides as substrates. The major metabolic end-product was lactic acid in the ratio of 86 % l-lactate : 14 % d-lactate. Strain WN1359T was sensitive to ampicillin, chloramphenicol, fusidic acid, lincomycin, monocycline, rifampicin, rifamycin SV, spectinomycin, streptomycin, troleandomycin and vancomycin, and resistant to nalidixic acid and aztreonam. The fatty acid content was predominantly unsaturated (70.2 %), branched-chain unsaturated (11.7 %) and saturated (12.5 %). The DNA G+C content was 35.3 mol% by whole genome sequence analysis. 16S rRNA gene sequence analysis showed 98.7 % sequence identity between strain WN1359T and Carnobacterium inhibens . Genome relatedness was computed using both Genome-to-Genome Distance Analysis (GGDA) and Average Nucleotide Identity (ANI), which both strongly supported strain WN1359T belonging to the species C. inhibens . On the basis of these results, the permafrost isolate WN1359T represents a novel subspecies of C. inhibens , for which the name Carnobacterium inhibens subsp. gilichinskyi subsp. nov. is proposed. The type strain is WN1359T ( = ATCC BAA-2557T = DSM 27470T). The subspecies Carnobacterium inhibens subsp. inhibens subsp. nov. is created automatically. An emended description of C. inhibens is also provided.

2015 ◽  
Vol 65 (Pt_1) ◽  
pp. 65-70 ◽  
Author(s):  
Mohammad Ali Amoozegar ◽  
Ali Makhdoumi-Kakhki ◽  
Maliheh Mehrshad ◽  
Mehrnoosh Rasooli ◽  
Seyed Abolhassan Shahzadeh Fazeli ◽  
...  

An extremely halophilic archaeon, strain IC35T, was isolated from a mud sample of the Aran-Bidgol salt lake in Iran. The novel strain was cream, non-motile, rod-shaped and required at least 2.5 M NaCl, but not MgCl2, for growth. Optimal growth was achieved with 3.4 M NaCl and 0.1 M MgCl2. The optimum pH and temperature for growth were pH 7.0 (grew over a pH range of 6.5–9.0) and 40 °C (grew over a temperature range of 30–50 °C), respectively. Analysis of 16S rRNA gene sequences revealed that strain IC35T clustered with species of the genus Halovivax , with sequence similarities of 97.3 %, 96.6 % and 96.3 %, respectively, to Halovivax limisalsi IC38T, Halovivax asiaticus EJ-46T and Halovivax ruber XH-70T. The rpoB′ gene similarities between the novel strain and Halovivax limisalsi IBRC-M 10022T, Halovivax ruber JCM 13892T and Halovivax asiaticus JCM 14624T were 90.2 %, 90.2 % and 89.9 %, respectively. The polar lipid pattern of strain IC35T consisted of phosphatidylglycerol and phosphatidylglycerol phosphate methyl ester; six unknown glycolipids and two minor phospholipids were also observed. The only quinone present was MK-8 (II-H2). The G+C content of the genomic DNA was 63.2 mol%. DNA–DNA hybridization studies (29 % hybridization with Halovivax limisalsi IBRC-M 10022T), as well as biochemical and physiological characterization, allowed strain IC35T to be differentiated from other species of the genus Halovivax . A novel species, Halovivax cerinus sp. nov., is therefore proposed to accommodate this strain. The type strain is IC35T ( = IBRC-M 10256T = KCTC 4050T).


Author(s):  
Timsy ◽  
Tobias Spanner ◽  
Andreas Ulrich ◽  
Susanne Kublik ◽  
Bärbel U. Foesel ◽  
...  

A novel strain was isolated from grassland soil that has the potential to assimilate ammonium by the reduction of nitrate in the presence of oxygen. Whole genome sequence analysis revealed the presence of an assimilatory cytoplasmic nitrate reductase gene nasA and the assimilatory nitrite reductase genes nirBD which are involved in the sequential reduction of nitrate to nitrite and further to ammonium, respectively. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the isolate represents a member of the genus Pseudomonas . The closest phylogenetic neighbours based on 16S rRNA gene sequence analysis are the type strains of Pseudomonas peli (98.17%) and Pseudomonas guineae (98.03%). In contrast, phylogenomic analysis revealed a close relationship to Pseudomonas alcaligenes . Computation of the average nucleotide identity (ANI) and digital DNA–DNA hybridization (dDDH) with the closest phylogenetic neighbours of S1-A32-2T revealed genetic differences at the species level, which were further substantiated by differences in several physiological characteristics. On the basis of these results, it was concluded that the soil isolate represents a novel species of the genus Pseudomonas, for which the name Pseudomonas campi sp. nov. (type strain S1-A32-2T=LMG 31521T=DSM 110222T) is proposed.


2012 ◽  
Vol 62 (Pt_4) ◽  
pp. 874-882 ◽  
Author(s):  
Jose R. López ◽  
Ana L. Diéguez ◽  
Alejandra Doce ◽  
Elena De la Roca ◽  
Roberto De la Herran ◽  
...  

Five Gram-negative bacterial isolates, recovered from an outbreak that occurred in March 2006 in Huelva, Spain, affecting adult diseased cultured wedge sole [Dicologlossa cuneata (Moreau)], were characterized phenotypically and genotypically in order to clarify their taxonomic position. On the basis of 16S rRNA gene sequence analysis, the isolates were included in the genus Pseudomonas , within the Pseudomonas fluorescens -related species group, their closest relatives being the Pseudomonas jessenii and Pseudomonas koreensis subgroups. The highest sequence similarities were recorded with the type strains of Pseudomonas reinekei , P. moorei , P. umsongensis , P. jessenii and P. mohnii (99.4–99.3 % similarity). Sequence analysis of the housekeeping genes gyrB and rpoD clearly differentiated the isolates from currently described Pseudomonas species, the highest sequence similarities recorded to type strains being below 95 % for both genes. Phylogenetic analysis using concatenated sequences of the three genes showed Pseudomonas moraviensis DSM 16007T and P. koreensis DSM 16610T as the closest reference strains. DNA–DNA hybridization assays with related strains confirmed that these isolates belong to a novel species of the genus Pseudomonas , for which the name Pseudomonas baetica sp. nov. is proposed. The type strain is strain a390T ( = CECT 7720T  = LMG 25716T). The novel species could be easily distinguished from phylogenetically related species by several phenotypic characteristics, including gelatin hydrolysis, acid production from glucose and growth at 6 % NaCl. Virulence assays revealed that the novel species is pathogenic for wedge sole.


2012 ◽  
Vol 62 (Pt_12) ◽  
pp. 3036-3041 ◽  
Author(s):  
Ana M. Marqués ◽  
César Burgos-Díaz ◽  
Francisco José Aranda ◽  
José Antonio Teruel ◽  
Àngels Manresa ◽  
...  

A novel Gram-negative-staining strain, designated 6.2ST, was isolated from a soil sample and identified as a biosurfactant producer. Its taxonomic position was investigated using a polyphasic approach. The cells were non-motile, non-spore-forming rods. The organism grew optimally at 30-37 °C, with 0–3 % (w/v) NaCl, and at pH 7.0. Based on 16S rRNA gene sequence analysis, strain 6.2ST was found to be a member of the genus Sphingobacterium and was most closely related to four type species of the genus, showing sequence similarities of 96.8–98.9 %. Partial chaperonin 60 (cpn60) gene sequence analysis was useful in resolving the phylogenetic relationships between strain 6.2ST and closely related taxa, with similarities ranging from 85.5 % (with Sphingobacterium thalpophilum DSM 11723T) to 90.3 % (with Sphingobacterium canadense CR11T and Sphingobacterium multivorum JCM 21156T). The results of DNA–DNA hybridization experiments between the novel strain and its closest relatives gave a DNA–DNA relatedness value of less than 70 %, and consequently confirmed that this new strain did not belong to a previously described species of the genus Sphingobacterium . The major fatty acids were summed feature 3 (iso-C15 : 0 2 OH and/or C16 : 1ω7c); iso-C15 : 0; iso-C17 : 0 3-OH and C16 : 0. The G+C content of the genomic DNA was 40.0 mol%. According to its phenotypic and genotypic characteristics and the phylogenetic data, strain 6.2ST represents a novel species of the genus Sphingobacterium , for which the name Sphingobacterium detergens sp. nov. is proposed. The type strain is 6.2ST ( = CECT 7938T = LMG 26465T).


2014 ◽  
Vol 64 (Pt_12) ◽  
pp. 3950-3957 ◽  
Author(s):  
Jerri E. Zilli ◽  
Alexandre C. Baraúna ◽  
Krisle da Silva ◽  
Sofie E. De Meyer ◽  
Eliane N. C. Farias ◽  
...  

Root nodule bacteria were isolated from Centrolobium paraense Tul. grown in soils from the Amazon region, State of Roraima (Brazil). 16S rRNA gene sequence analysis of seven strains (BR 10247T, BR 10296, BR 10297, BR 10298, BR 10299, BR 10300 and BR 10301) placed them in the genus Bradyrhizobium with the closest neighbours being the type strains of Bradyrhizobium paxllaeri (98.8 % similarity), Bradyrhizobium icense (98.8 %), Bradyrhizobium lablabi (98.7 %), Bradyrhizobium jicamae (98.6 %), Bradyrhizobium elkanii (98.6 %), Bradyrhizobium pachyrhizi (98.6 %) and Bradyrhizobium retamae (98.3 %). This high similarity, however, was not confirmed by the intergenic transcribed spacer (ITS) 16S–23S rRNA region sequence analysis nor by multi-locus sequence analysis. Phylogenetic analyses of five housekeeping genes (dnaK, glnII, gyrB, recA and rpoB) revealed Bradyrhizobium iriomotense EK05T ( = LMG 24129T) to be the most closely related type strain (95.7 % sequence similarity or less). Chemotaxonomic data, including fatty acid profiles [major components being C16 : 0 and summed feature 8 (18 : 1ω6c/18 : 1ω7c)], DNA G+C content, slow growth rate and carbon compound utilization patterns, supported the placement of the novel strains in the genus Bradyrhizobium . Results of DNA–DNA relatedness studies and physiological data (especially carbon source utilization) differentiated the strains from the closest recognized species of the genus Bradyrhizobium . Symbiosis-related genes for nodulation (nodC) and nitrogen fixation (nifH) placed the novel species in a new branch within the genus Bradyrhizobium . Based on the current data, these seven strains represent a novel species for which the name Bradyrhizobium neotropicale sp. nov. is proposed. The type strain is BR 10247T ( = HAMBI 3599T).


2013 ◽  
Vol 63 (Pt_7) ◽  
pp. 2588-2593 ◽  
Author(s):  
Bárbara Almeida ◽  
Ivone Vaz-Moreira ◽  
Peter Schumann ◽  
Olga C. Nunes ◽  
Gilda Carvalho ◽  
...  

A Gram-positive, aerobic, non-motile, non-endospore-forming rod-shaped bacterium with ibuprofen-degrading capacity, designated strain I11T, was isolated from activated sludge from a wastewater treatment plant. The major respiratory quinone was demethylmenaquinone DMK-7, C18 : 1 cis9 was the predominant fatty acid, phosphatidylglycerol was the predominant polar lipid, the cell wall contained meso-diaminopimelic acid as the diagnostic diamino acid and the G+C content of the genomic DNA was 74.1 mol%. On the basis of 16S rRNA gene sequence analysis, the closest phylogenetic neighbours of strain I11T were Patulibacter ginsengiterrae CECT 7603T (96.8 % similarity), Patulibacter minatonensis DSM 18081T (96.6 %) and Patulibacter americanus DSM 16676T (96.6 %). Phenotypic characterization supports the inclusion of strain I11T within the genus Patulibacter (phylum Actinobacteria) . However, distinctive features and 16S rRNA gene sequence analysis suggest that is represents a novel species, for which the name Patulibacter medicamentivorans sp. nov. is proposed. The type strain is I11T ( = DSM 25962T = CECT 8141T).


2015 ◽  
Vol 65 (Pt_1) ◽  
pp. 189-194 ◽  
Author(s):  
Antje Rusch ◽  
Shaer Islam ◽  
Pratixa Savalia ◽  
Jan P. Amend

Enrichment cultures inoculated with hydrothermally influenced nearshore sediment from Papua New Guinea led to the isolation of an arsenic-tolerant, acidophilic, facultatively aerobic bacterial strain designated PNG-AprilT. Cells of this strain were Gram-stain-negative, rod-shaped, motile and did not form spores. Strain PNG-AprilT grew at temperatures between 4 °C and 40 °C (optimum 30–37 °C), at pH 3.5 to 8.3 (optimum pH 5–6) and in the presence of up to 2.7 % NaCl (optimum 0–1.0 %). Both arsenate and arsenite were tolerated up to concentrations of at least 0.5 mM. Metabolism in strain PNG-AprilT was strictly respiratory. Heterotrophic growth occurred with O2 or nitrate as electron acceptors, and aerobic lithoautotrophic growth was observed with thiosulfate or nitrite as electron donors. The novel isolate was capable of N2-fixation. The respiratory quinones were Q-8 and Q-7. Phylogenetically, strain PNG-AprilT belongs to the genus Burkholderia and shares the highest 16S rRNA gene sequence similarity with the type strains of Burkholderia fungorum (99.8 %), Burkholderia phytofirmans (98.8 %), Burkholderia caledonica (98.4 %) and Burkholderia sediminicola (98.4 %). Differences from these related species in several physiological characteristics (lipid composition, carbohydrate utilization, enzyme profiles) and DNA–DNA hybridization suggested the isolate represents a novel species of the genus Burkholderia , for which we propose the name Burkholderia insulsa sp. nov. The type strain is PNG-AprilT ( = DSM 28142T = LMG 28183T).


2013 ◽  
Vol 63 (Pt_4) ◽  
pp. 1545-1549 ◽  
Author(s):  
Yan Bing Lin ◽  
Xin Ye Wang ◽  
Ting Ting Wang ◽  
Shao Shan An ◽  
Peng Shi ◽  
...  

A novel actinobacterium, designated strain F22T, was isolated from grassland soil collected from the Ziwuling area on the Loess Plateau, China. The novel strain was found to have morphological and chemotaxonomic characteristics typical of members of the genus Streptomyces . Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain F22T belonged to the genus Streptomyces , being most closely related to Streptomyces resistomycificus NBRC 12814T (98.28 % sequence similarity), Streptomyces ciscaucasicus NBRC 12872T (98.14 %), Streptomyces chartreusis NBRC 12753T (98.14 %) and Streptomyces canus NRRL B-1989T (98.14 %). In DNA–DNA hybridizations and comparisons of morphological and phenotypic data, strain F22T could be distinguished from all of its closest phylogenetic relatives. Strain F22T exhibited antibacterial and antifungal activity, especially against Staphylococcus aureus , Bacillus subtilis and Cylindrocarpon destructans. Based on the DNA–DNA hybridization data and morphological, phenotypic and phylogenetic evidence, strain F22T represents a novel species of the genus Streptomyces , for which the name Streptomyces ziwulingensis sp. nov. is proposed. The type strain is F22T ( = CCNWFX 0001T = JCM 18081T = ACCC41875T).


Author(s):  
Selma Vieira ◽  
Katharina J. Huber ◽  
Meina Neumann-Schaal ◽  
Alicia Geppert ◽  
Manja Luckner ◽  
...  

Members of the metabolically diverse order Nitrosomonadales inhabit a wide range of environments. Two strains affiliated with this order were isolated from soils in Germany and characterized by a polyphasic approach. Cells of strains 0125_3T and Swamp67T are Gram-negative rods, non-motile, non-spore-forming, non-capsulated and divide by binary fission. They tested catalase-negative, but positive for cytochrome c-oxidase. Both strains form small white colonies on agar plates and grow aerobically and chemoorganotrophically on SSE/HD 1 : 10 medium, preferably utilizing organic acids and proteinaceous substrates. Strains 0125_3T and Swamp67T are mesophilic and grow optimally without NaCl addition at slightly alkaline conditions. Major fatty acids are C16 : 1  ω7c, C16 : 0 and C14 : 0. The major polar lipids are diphosphatidylglycerol, phosphatidylethanolamine and phosphatidyglycerol. The predominant respiratory quinone is Q-8. The G+C content for 0125_3T and Swamp67T was 67 and 66.1 %, respectively. The 16S rRNA gene analysis indicated that the closest relatives (<91 % sequence similarity) of strain 0125_3T were Nitrosospira multiformis ATCC 25196T, Methyloversatilis universalis FAM5T and Denitratisoma oestradiolicum AcBE2-1T, while Nitrosospira multiformis ATCC 25196T, Nitrosospira tenuis Nv1T and Nitrosospira lacus APG3T were closest to strain Swamp67T. The two novel strains shared 97.4 % 16S rRNA gene sequence similarity with one another and show low average nucleotide identity of their genomes (83.8 %). Based on the phenotypic, chemotaxonomic, genomic and phylogenetic analysis, we propose the two novel species Usitatibacter rugosus sp. nov (type strain 0125_3T=DSM 104443T=LMG 29998T=CECT 9241T) and Usitatibacter palustris sp. nov. (type strain Swamp67T=DSM 104440T=LMG 29997T=CECT 9242T) of the novel genus Usitatibacter gen. nov., within the novel family Usitatibacteraceae fam. nov.


Author(s):  
Soon Dong Lee ◽  
In Seop Kim

Two novel actinobacterial strains, designated C9-5T and C3-43, were isolated from soil samples of a cave in Jeju Island, Republic of Korea, and subjected to taxonomic study by a polyphasic approach. The organisms exhibited a typical rod–coccus developmental cycle during growth and grew at 10–30 °C, pH 5–9 and 0–3 % (w/v) NaCl. In 92 single-copy core gene sequence analysis, strain C9-5T was loosely associated with Rhodococcus tukisamuensis , albeit sharing low 16S rRNA gene sequence similarity (97.4 %). A combination of morphological and chemotaxonomic characteristics supported assignment with the genus Rhodococcus . With respect to 16S rRNA gene sequence similarity, the novel isolates showed the highest identity to the type strain of Rhodococcus subtropicus (98.7 % sequence similarity), followed by Rhodococcus olei (98.5 %) and Rhodococcus pedocola (98.4 %).The average nucleotide identity and digital DNA–DNA hybridization values between strain C9-5T and members of the genus Rhodococcus were ≤81.5 and ≤37.1 %, respectively. A set of physiological and chemotaxonomic properties together with overall genomic relatedness differentiated the novel isolates from members of the genus Rhodococcus , for which the name Rhodococcus spelaei sp. nov. is proposed. The type strain is C9-5T (=KACC 19822T=DSM 107558T). Based on genome analysis performed here, it is also proposed that Rhodococcus biphenylivorans Su et al. 2015 is a later heterotypic synonym of Rhodococcus pyridinivorans Yoon et al. 2000, Rhodococcus qingshengii Xu et al. 2007 and Rhodococcus baikonurensis Li et al. 2004 are later heterotypic synonyms of Rhodococcus erythropolis (Gray and Thornton 1928) Goodfellow and Alderson 1979 (Approved Lists 1980), and Rhodococcus percolatus Briglia et al. 1996 and Rhodococcus imtechensis Ghosh et al. 2006 are later heterotypic synonyms of Rhodococcus opacus Klatte et al. 1995.


Sign in / Sign up

Export Citation Format

Share Document