- Volume 58, Issue 4, 2008
Volume 58, Issue 4, 2008
- Notification List
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Notification that new names and new combinations have appeared in volume 58, part 1, of the IJSEM
This listing of names published in a previous issue of the IJSEM is provided as a service to bacteriology to assist in the recognition of new names and new combinations. This procedure was proposed by the Judicial Commission [Minute 11(ii), Int J Syst Bacteriol 41 (1991), p. 185]. The names given herein are listed according to the Rules of priority (i.e. page number and order of valid publication of names in the original articles). Taxonomic opinions included in this List (i.e. the creation of synonyms or the emendation of circumscriptions) cannot be considered as validly published nor, in any other way, approved by the International Committee on Systematics of Prokaryotes and its Judicial Commission.
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- New Taxa
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- Actinobacteria
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Proposal to reclassify the three biotypes of Bifidobacterium longum as three subspecies: Bifidobacterium longum subsp. longum subsp. nov., Bifidobacterium longum subsp. infantis comb. nov. and Bifidobacterium longum subsp. suis comb. nov.
More LessIn the year 2002, Bifidobacterium longum, Bifidobacterium infantis and Bifidobacterium suis were unified into a single species, Bifidobacterium longum, preserving the former species names through the creation of the three biotypes ‘longum’, ‘infantis’ and ‘suis’. Consequently, the use of the species names B. infantis and B. suis was to be discontinued. The above taxonomic rearrangement of B. longum was based on DNA–DNA hybridizations and 16S rRNA and HSP60 gene sequence analysis. However, a variety of other genotypic techniques including ribotyping, amplified rDNA restriction analysis (ARDRA), randomly amplified polymorphic DNA (RAPD)-PCR, BOX-PCR, PCR-denaturing gradient gel electrophoresis (DGGE), comparison of the recA, tuf and ldh gene sequences, plasmid profiling and considerable variation in carbohydrate fermentation patterns as well as results of starch and PAGE electrophoresis experiments clearly discriminate former B. longum, B. infantis and B. suis strains. In the present paper we compile this published information and propose the description of Bifidobacterium longum subsp. longum subsp. nov., Bifidobacterium longum subsp. infantis comb. nov. and Bifidobacterium longum subsp. suis comb. nov. The International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Bifidobacterium, Lactobacillus and related organisms is in favour of this proposal. The type strains of Bifidobacterium longum subsp. longum subsp. nov., subsp. infantis comb. nov. and subsp. suis comb. nov. are E194b (variant a)T (ATCC 15707T=DSM 20219T), S12T (=ATCC 15697T=DSM 20088T) and Su859T (ATCC 27533T=DSM 20211T), respectively.
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Tessaracoccus flavescens sp. nov., isolated from marine sediment
More LessA novel actinobacterium, designated strain SST-39T, was isolated from a marine sediment sample collected in Jeju, Republic of Korea. Cells were facultatively anaerobic, Gram-positive, non-endospore-forming, non-motile rods. Colonies were circular, slightly convex, opaque and brilliant yellow. The cell-wall peptidoglycan of the organism contained ll-diaminopimelic acid as the diagnostic diamino acid. Polar lipids included phosphatidylglycerol and diphosphatidylglycerol. The predominant menaquinone was MK-9(H4). The major cellular fatty acids were anteiso-C15 : 0, C18 : 0 and C16 : 0. The DNA G+C content was 68.4 mol%. A phylogenetic tree based on 16S rRNA gene sequences indicated that the isolate belonged to the family Propionibacteriaceae and formed a unique cluster with the type strain of Tessaracoccus bendigoensis (97.0 % sequence similarity). Other phylogenetic neighbours were the type strains of Luteococcus peritonei (95.1 % 16S rRNA gene sequence similarity) and Propionibacterium propionicum (95.1 %). On the basis of its phenotypic and phylogenetic distinctiveness, strain SST-39T is considered to represent a novel species of the genus Tessaracoccus, for which the name Tessaracoccus flavescens sp. nov. is proposed. The type strain is SST-39T (=DSM 18582T =KCTC 19196T).
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Saxeibacter lacteus gen. nov., sp. nov., an actinobacterium isolated from rock
More LessA Gram-positive, cream-coloured, non-motile, rod-shaped actinomycete, designated DLS-10T, was isolated from a rock collected on the peak of Darangshi Oreum (a small mountain 300 m above sea level) in Jeju, Republic of Korea. The temperature and pH ranges for growth were 4–37 °C and pH 5.1–9.1. The organism grew at NaCl concentrations up to 3 % and had the following chemotaxonomic characteristics: meso-diaminopimelic acid was the diagnostic diamino acid in the cell-wall peptidoglycan, the polar lipids included diphosphatidylglycerol, phosphatidylmethylethanolamine and two unknown phospholipids, the major menaquinone was MK-8(H4) and the major fatty acids were anteiso-C15 : 0, C16 : 0, iso-C16 : 0 and anteiso-C17 : 0. The DNA G+C content was 74.3 mol%. Phylogenetic analyses based on 16S rRNA gene sequences revealed that the organism was related to members of the family Nakamurellaceae in the suborder Frankineae. The most closely related described organisms were the type strains of Humicoccus flavidus (97.1 % sequence similarity) and Nakamurella multipartita (95.2 %). On the basis of the morphological, cultural, physiological, chemotaxonomic and phylogenetic evidence presented here, the organism represents a novel genus and species of the family Nakamurellaceae, for which the name Saxeibacter lacteus gen. nov., sp. nov. is proposed. The type strain of Saxeibacter lacteus is DLS-10T (=KCTC 19285T =DSM 19367T).
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Micromonospora chaiyaphumensis sp. nov., isolated from Thai soils
More LessThree actinomycete strains, MC5-1T, MC7-1 and R1-1, were isolated from soil samples collected in Thailand. Their taxonomic positions were determined using a polyphasic approach. The chemotaxonomic characteristics of these strains coincided with those of the genus Micromonospora, i.e. meso-diaminopimelic acid and N-glycolyl muramic acid were present in the cell-wall peptidoglycan, the whole-cell sugars were of pattern D, the phospholipids were of type II and the cellular fatty acids were of type 3b. Phylogenetic analysis of the 16S rRNA gene sequences revealed a close relationship between strains MC5-1T, MC7-1 and R1-1 (99.8 % sequence similarity) and Micromonospora auratinigra JCM 12357T (99.3 %). The three novel strains were clearly distinguishable from M. auratinigra JCM 12357T from the low DNA–DNA relatedness (≤43.4 %). On the basis of the data presented, strain MC5-1T represents a novel species of the genus Micromonospora, for which the name Micromonospora chaiyaphumensis is proposed. The type strain is MC5-1T (=KCTC 19332T=JCM 12873T=PCU 267T=TISTR 1564T).
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Aeromicrobium ponti sp. nov., isolated from seawater
More LessA novel actinomycete strain, designated HSW-1T, was isolated from seawater collected from Hwasun Beach on the coast of Jeju Island, Republic of Korea. The cells were aerobic, Gram-positive, oxidase-negative, catalase-positive, non-motile rods. The colonies were circular, smooth, convex and yellow in colour. The cell-wall peptidoglycan of this organism contained ll-diaminopimelic acid as the diagnostic diamino acid. The polar lipids included phosphatidylinositol, diphosphatidylglycerol, phosphatidylglycerol and three unknown phospholipids. The predominant menaquinone was MK-9(H4). The major fatty acids were C18 : 1 ω9c, C16 : 0, C16 : 0 2-OH and 10-methyl C18 : 0. The DNA G+C content was 74.0 mol%. A neighbour-joining tree based on 16S rRNA gene sequences showed that this organism falls within the radiation of the genus Aeromicrobium. The closest phylogenetic neighbours were the type strains of Aeromicrobium erythreum (98.2 % 16S rRNA gene sequence similarity), Aeromicrobium alkaliterrae (97.9 %), Aeromicrobium marinum (97.3 %) and Aeromicrobium fastidiosum (97.0 %). The DNA–DNA relatedness values between the novel isolate and its closest relative, A. erythreum DSM 8599T, ranged between 32 and 36 %. On the basis of the phenotypic and DNA–DNA hybridization data, strain HSW-1T represents a novel species of the genus Aeromicrobium, for which the name Aeromicrobium ponti sp. nov. is proposed. The type strain is HSW-1T (=DSM 19178T=KACC 20565T).
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Humibacter albus gen. nov., sp. nov., isolated from sewage sludge compost
A bacterial strain isolated from sewage sludge compost, strain SC-083T, was characterized. The isolate was a motile, Gram-positive, short rod, forming coryneform V-shaped cells during the early stages of growth. The organism was strictly aerobic and able to grow between 22 and 36 °C and between pH 5.5 and 8.0. The predominant fatty acids were cyclohexyl-C17 : 0, anteiso-C17 : 0 and iso-C16 : 0, the major respiratory quinones were menaquinone 11 (MK-11) and 12 (MK-12), and the genomic DNA G+C content was 68 mol%. The peptidoglycan contained the diagnostic diamino acids ornithine and 2,4-diaminobutyric acid and was of acetyl type. The 16S rRNA gene sequence analysis indicated that this isolate belongs to the family Microbacteriaceae with the type strains of the species Leifsonia xyli (96 % gene sequence similarity), Leifsonia shinshuensis (96 %), Leifsonia naganoensis (95 %), Leifsonia aquatica (95 %), Agromyces ramosus (95 %) and Curtobacterium citreum (95 %) among the closest phylogenetic neighbours. The phylogenetic analysis and phenetic characteristics support the proposal of a new genus and a novel species, with the name Humibacter albus gen. nov., sp. nov. The type strain of Humibacter albus is SC-083T (=DSM 18994T =CCUG 54538T =LMG 23996T).
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Microterricola viridarii gen. nov., sp. nov., a new member of the family Microbacteriaceae
More LessStrain KV-677T, a Gram-positive, aerobic, motile, rod-shaped bacterium, was isolated from park soil in Tokyo, Japan, and characterized. It grew well at 15–30 °C on nutrient agar and colonies were pale yellow. The cell-wall peptidoglycan contained diaminobutyric acid, glycine, alanine and glutamic acid and the muramic acid acyl type was acetyl. The predominant menaquinone was MK-12. Mycolic acids were not detected. The DNA G+C content was 70 mol%. 16S rRNA gene sequence analysis revealed that strain KV-677T fell within the cluster of the family Microbacteriaceae and formed a separate lineage joining the genera Salinibacterium, Rhodoglobus, Subtercola and Agreia, showing 95.5–96.9 % sequence similarities with the type strains of the type species of the above genera. However, strain KV-677T clearly differed from these and other genera with relatively high sequence similarity in its chemotaxonomic characteristics. Therefore, it is proposed that strain KV-677T represents a novel species in a new genus, Microterricola viridarii gen. nov., sp. nov., in the family Microbacteriaceae. The type strain of Microterricola viridarii is KV-677T (=NRRL B-24538T =NBRC 102123T).
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Streptomyces griseus 45H, a producer of the extracellular autoregulator protein factor C, is a member of the species Streptomyces albidoflavus
More LessStreptomyces griseus strain 45H, isolated in 1960 during a mutagenesis programme on the industrial streptomycin producer S. griseus 52-1, encodes an extracellular, pleiotropic autoregulatory signalling protein, factor C, which stimulates sporulation of S. griseus 52-1 in submerged culture. The facC gene, which codes for factor C, is present in very few streptomycetes and is not present in S. griseus 52-1. Based on 16S rRNA gene sequencing and other molecular data, S. griseus 45H, the factor C producer, is here shown to be related to the original laboratory strain of Streptomyces flavofungini, which was being studied in the same laboratory in 1960, and to Streptomyces albidoflavus. Southern blotting revealed that three out of four independently isolated strains of S. albidoflavus possess facC. Both the original strain of S. flavofungini and S. griseus 45H are therefore identified as members of the species Streptomyces albidoflavus, and we propose that S. griseus 45H should be renamed Streptomyces albidoflavus 45H.
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- Archaea
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Haloferax elongans sp. nov. and Haloferax mucosum sp. nov., isolated from microbial mats from Hamelin Pool, Shark Bay, Australia
Extremely halophilic archaea were cultivated from smooth and pustular microbial mats collected from Hamelin Pool, Shark Bay, Western Australia. On the basis of morphology, two phenotypes were present and 16S rRNA gene sequence analysis indicated that all strains were most closely related to members of the genus Haloferax (98.1–99.4 % similarity). One representative strain from each phenotype was selected for further taxonomic characterization. Strain SA5T, isolated from the smooth mat, formed small (∼1 mm diameter), red, translucent colonies on agar medium and strain PA12T, isolated from the pustular mat, formed large (3–5 mm diameter), pink, mucoid, domed colonies. Both strains grew in media with 1.7–5.1 M NaCl, required at least 0.2 M Mg2+ for growth and had pH optima of 7.4. The 16S rRNA gene similarity between strains SA5T and PA12T was 97.1 %. Physiological properties, G+C content and polar lipid composition supported placement of both strains in the genus Haloferax. Phenotypic analysis indicated that the two strains were distinct from each other and from all other members of the genus. This was confirmed by the low DNA–DNA relatedness between strains SA5T and PA12T (18–30 %) and between both strains and all other recognized Haloferax species. Two novel species of the genus Haloferax are proposed to accommodate these novel isolates, Haloferax elongans sp. nov. (type strain SA5T=JCM 14791T=ATCC BAA-1513T=UNSW 104100T) and Haloferax mucosum sp. nov. (type strain PA12T=JCM 14792T=ATCC BAA-1512T=UNSW 104200T).
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Archaeoglobus infectus sp. nov., a novel thermophilic, chemolithoheterotrophic archaeon isolated from a deep-sea rock collected at Suiyo Seamount, Izu-Bonin Arc, western Pacific Ocean
More LessA novel thermophilic, strictly anaerobic archaeon, designated strain Arc51T, was isolated from a rock sample collected from a deep-sea hydrothermal field in Suiyo Seamount, Izu-Bonin Arc, western Pacific Ocean. Cells of the isolate were irregular cocci with single flagella and exhibited blue–green fluorescence at 436 nm. The optimum temperature, pH and NaCl concentration for growth were 70 °C, pH 6.5 and 3 % (w/v), respectively. Strain Arc51T could grow on thiosulfate or sulfite as an electron acceptor in the presence of hydrogen. This strain required acetate as a carbon source for its growth, suggesting that the reductive acetyl CoA pathway for CO2 fixation was incomplete. In addition, coenzyme M (2-mercaptoethanesulfonic acid), which is a known methyl carrier in methanogenesis, was also a requirement for growth of the strain. Analysis of the 16S rRNA gene sequence revealed that the isolate was similar to members of the genus Archaeoglobus, with sequence similarities of 93.6–97.2 %; the closest relative was Archaeoglobus veneficus. Phylogenetic analyses of the dsrAB and apsA genes, encoding the alpha and beta subunits of dissimilatory sulfite reductase and the alpha subunit of adenosine-5′-phosphosulfate reductase, respectively, produced results similar to those inferred from comparisons based on the 16S rRNA gene sequence. On the basis of phenotypic and phylogenetic data, strain Arc51T represents a novel species of the genus Archaeoglobus, for which the name Archaeoglobus infectus sp. nov. is proposed. The type strain is Arc51T (=NBRC 100649T=DSM 18877T).
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Halosarcina pallida gen. nov., sp. nov., a halophilic archaeon from a low-salt, sulfide-rich spring
More LessA novel halophilic archaeon, strain BZ256T, was isolated from Zodletone Spring, a sulfide- and sulfur-rich spring in south-western Oklahoma, USA. Cells were non-motile, non-flagellated cocci that divided along two axes, resulting in the formation of sarcina-like clusters. Strain BZ256T grew at salt concentrations ranging from 1.3 to 4.3 M NaCl, with optimum growth at approximately 3.4 M, and required at least 1 mM Mg2+ for growth. The pH range for growth was 5.0 to at least 8.5, and the temperature range for growth was 25–45 °C. The two diether phospholipids that are typical of members of the order Halobacteriales, namely phosphatidylglycerol and phosphatidylglycerol phosphate methyl ester, were present in strain BZ256T, as were two glycolipids chromatographically identical to S-DGD-1 and DGD-1. The 16S rRNA gene sequence of strain BZ256T showed 96.8 % similarity to that of the type strain of Halogeometricum borinquense, the closest recognized species within the order Halobacteriales. The DNA G+C content of strain BZ256T was 65.4 mol%. Microscopic, physiological, biochemical and phylogenetic comparisons between strain BZ256T and recognized genera of extremely halophilic archaea suggest that this strain represents a member of a novel genus and species within the family Halobacteriaceae, for which the name Halosarcina pallida gen. nov., sp. nov. is proposed. The type strain of Halosarcina pallida is BZ256T (=KCTC 4017T =JCM 14848T).
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Methanocella paludicola gen. nov., sp. nov., a methane-producing archaeon, the first isolate of the lineage ‘Rice Cluster I’, and proposal of the new archaeal order Methanocellales ord. nov.
More LessA novel mesophilic, hydrogenotrophic methanogen, strain SANAET, was isolated from an anaerobic, propionate-degrading enrichment culture, which was originally established from rice paddy soil. The cells were non-motile, Gram-negative and rod-shaped (1.8–2.4 μm long by 0.3–0.6 μm wide). Growth of strain SANAET was observed at 25–40 °C, with an optimum temperature range for growth of 35–37 °C. The pH range for growth was 6.5–7.8, with an optimum at pH 7.0. The salinity range for growth was 0–1 g NaCl l−1 (0–17 mM). The isolate was able to utilize H2/CO2 and formate for growth and methane production. The G+C content of the genomic DNA was 56.6 mol%. Based on comparative 16S rRNA gene sequence analysis, strain SANAET was affiliated with a clone lineage of the Archaea, Rice Cluster I (RC-I), placing it between the orders Methanosarcinales and Methanomicrobiales within the class ‘Methanomicrobia’. 16S rRNA gene sequence similarities between strain SANAET and members of Methanosarcinales were in the range 80.0–82.8 %, and those between the strain and members of Methanomicrobiales ranged from 77.5 to 82.4 %. In addition to 16S rRNA gene analysis, sequence analysis of the mcrA gene (encoding the α subunit of methyl-coenzyme M reductase, a key enzyme in the methane production pathway) also showed that strain SANAET was affiliated with the RC-I lineage. Here, we propose the name Methanocella paludicola gen. nov., sp. nov. for the isolate, the first of the RC-I lineage. The type strain is SANAET (=JCM 13418T=NBRC 101707T=DSM 17711T). In addition, we also propose the status of order for the RC-I lineage, for which we propose the name Methanocellales ord. nov.
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- Bacteroidetes
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Flavobacterium anhuiense sp. nov., isolated from field soil
More LessA novel strain, D3T, isolated from a field-soil sample obtained from Anhui Province, PR China, was characterized taxonomically by using a polyphasic approach. The cells were Gram-negative, yellow-pigmented rods devoid of flagella, but showing gliding motility. The organism was able to grow at 5–37 °C and at pH 4.0–10.0. A comparative 16S rRNA gene sequence analysis indicated that strain D3T is a member of the genus Flavobacterium, sharing highest sequence similarity with the type strain of Flavobacterium defluvii (96.7 %). The major isoprenoid quinone was MK-6 and the predominant fatty acids were iso-C15 : 0, summed feature 3 (C16 : 1 ω7c and/or iso-C15 : 0 2-OH) and C16 : 0. The DNA G+C content was 31.4 mol%. On the basis of phylogenetic and phenotypic data, strain D3T represents a novel species within the genus Flavobacterium, for which the name Flavobacterium anhuiense sp. nov. is proposed. The type strain is D3T (=KCTC 22128T=CGMCC 1.6859T).
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Tenacibaculum aiptasiae sp. nov., isolated from a sea anemone Aiptasia pulchella
More LessA novel bacterial strain, designated a4T, isolated from a sea anemone (Aiptasia pulchella) in Taiwan, was characterized using a polyphasic taxonomic approach. Strain a4T was aerobic, Gram-negative, pale-yellow-pigmented and rod-shaped. It grew optimally at 30–35 °C, in the presence of 3–4 % (w/v) NaCl and at pH 8.0. Phylogenetic analyses based on 16S rRNA gene sequences showed that the strain belonged to the genus Tenacibaculum (family Flavobacteriaceae, phylum Bacteroidetes). The closest neighbours were Tenacibaculum lutimaris TF-26T (97.6 % similarity) and Tenacibaculum aestuarii SMK-4T (97.7 % similarity). The novel isolate could be distinguished from all Tenacibaculum species by several phenotypic characteristics. The major fatty acids were summed feature 3 (comprising C16 : 1 ω7c and/or iso-C15 : 0 2-OH, 19.6 %), iso-C15 : 0 (12.9 %), iso-C16 : 0 3-OH (10.2 %), iso-C17 : 0 3-OH (9.9 %) and iso-C15 : 1 (9.5 %). The DNA G+C content was 35.0 mol%. Hence, genotypic and phenotypic data demonstrate that strain a4T should be classified as a representative of a novel species in the genus Tenacibaculum, for which the name Tenacibaculum aiptasiae sp. nov. is proposed. The type strain is a4T (=BCRC 17655T =LMG 24004T).
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Description of Maribacter forsetii sp. nov., a marine Flavobacteriaceae isolated from North Sea water, and emended description of the genus Maribacter
Three rod-shaped, Gram-negative, chemo-organotrophic, heterotrophic, strictly aerobic, gliding bacterial strains, KT02ds18-4, KT02ds18-5 and KT02ds18-6T, were isolated from North Sea surface waters near the island of Helgoland, Germany. Their taxonomic position was investigated by a polyphasic approach. The three strains were light yellow, oxidase- and catalase-positive, and grew optimally at 25 °C, at pH 7.5, and in the presence of 2.5 % (w/v) NaCl. The Chargaff's coefficient was 34.2–34.4 mol%. The three strains shared >90 % DNA–DNA relatedness and an identical 16S rRNA gene sequence. Comparative 16S rRNA gene sequence analysis allocated the three strains to the genus Maribacter in the family Flavobacteriaceae, with similarities of 97.0–97.4 % to five of the recognized Maribacter species. Their low level of DNA–DNA relatedness (<20 %) with these species and differentiating phenotypic characteristics demonstrated that they constitute a new Maribacter species for which the name Maribacter forsetii sp. nov. is proposed. Strain KT02ds18-6T (=CIP 109504T=DSM 18668T) is the type strain. An emended description of the genus Maribacter is also proposed.
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Tenacibaculum soleae sp. nov., isolated from diseased sole (Solea senegalensis Kaup)
More LessA novel Gram-negative, rod-shaped, gliding bacterial strain designated LL04 12.1.7T was isolated from diseased sole (Solea senegalensis Kaup) in Galicia, Spain. Colonies were yellow-pigmented with uneven edges and did not adhere to the agar. The DNA G+C content of the strain was 29.8 mol%. 16S rRNA gene sequence similarity analysis indicated that strain LL04 12.1.7T is a member of the genus Tenacibaculum in the family Flavobacteriaceae. Sequence similarities between the isolate and the type strains of other members of the genus were 96.7–94.8 %. The major fatty acids (>10 % of total fatty acids) were iso-C15 : 0 (23.1 %), iso-C15 : 0 3-OH (10.6 %), C15 : 1 ω6c (12.2 %) and summed feature 3 (comprising C16 : 1 ω7c and/or iso-C15 : 0 2-OH, 11.0 %). Genotypic and phenotypic data distinguished strain LL04 12.1.7T from the 11 recognized Tenacibaculum species, indicating that it represents a novel species, for which the name Tenacibaculum soleae sp. nov. is proposed. The type strain is strain LL04 12.1.7T (=CECT 7292T =NCIMB 14368T).
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Hymenobacter soli sp. nov., isolated from grass soil
More LessA Gram-negative, strictly aerobic, non-spore-forming, rod-shaped, red–pink bacterium, designated strain PB17T, was isolated from grass soil in the Republic of Korea and its taxonomic position was investigated by means of a polyphasic approach. Phylogenetic analysis of 16S rRNA gene sequences showed that strain PB17T belonged to the genus Hymenobacter. Sequence similarities between strain PB17T and the type strains of Hymenobacter species with validly published names ranged from 90.1 to 91.8 %. The predominant cellular fatty acids in strain PB17T were iso-C15 : 0, summed feature 4 (iso-C15 : 0 2-OH and/or C16 : 1 ω7c), C16 : 1 ω5c and anteiso-C15 : 0. The DNA G+C content was 58.8 mol%. The results of phylogenetic, chemotaxonomic and phenotypic characterization indicated that strain PB17T can be distinguished from all known Hymenobacter species and represents a novel species, for which the name Hymenobacter soli sp. nov. is proposed. The type strain is PB17T (=KCTC 12607T =LMG 24240T).
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Limibacter armeniacum gen. nov., sp. nov., a novel representative of the family ‘Flammeovirgaceae’ isolated from marine sediment
More LessTwo strictly aerobic, Gram-negative, gliding, apricot- to pale-orange-pigmented, rod-shaped bacteria, strains YM11-185T and YM11-159, were isolated from marine sediments in the Republic of Palau. Preliminary analysis based on the 16S rRNA gene sequence revealed that the novel isolates could be affiliated with the family ‘Flammeovirgaceae’ of the phylum Bacteroidetes. Strains YM11-185T and YM11-159 shared 100 % sequence similarity and showed less than 90 % similarity to cultivated representatives of the family ‘Flammeovirgaceae’. The novel isolates are phenotypically and physiologically different from strains described previously. The G+C content of DNA was 27.8–27.9 mol%, MK-7 was the major menaquinone and iso-C15 : 0 and C16 : 1 ω7c were the major fatty acids. On the basis of polyphasic taxonomic studies, it was concluded that strains YM11-185T and YM11-159 represent a novel species in a new genus of the family ‘Flammeovirgaceae’, for which the name Limibacter armeniacum gen. nov., sp. nov. is proposed. The type strain of Limibacter armeniacum is YM11-185T (=MBIC08286T =KCTC 22132T).
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Bacteroides xylanisolvens sp. nov., a xylan-degrading bacterium isolated from human faeces
More LessDuring the course of a study on the xylan-degrading community from the human gut, six xylanolytic, Gram-negative, anaerobic rods were isolated from faecal samples. 16S rRNA gene sequence analysis showed that the isolates were closely related to each other (≥99 % sequence similarity) and that they belonged to the genus Bacteroides. On the basis of 16S rRNA gene sequence similarity, representative strain XB1AT was most closely related to the type strains of Bacteroides ovatus (97.5 %), B. finegoldii (96.5 %) and B. thetaiotaomicron (95.5 %). DNA–DNA hybridization results revealed that strain XB1AT was distinct from its closest relative, B. ovatus. The DNA G+C content of strain XB1AT (42.8 mol%) and major fatty acid composition (anteiso-C15 : 0, 33.8 %) further supported its affiliation to the genus Bacteroides. The novel isolates degraded different types of xylan, and were also able to grow on a variety of carbohydrates. Unlike most other Bacteroides species isolated from the human gut, these isolates were not able to degrade starch. Other biochemical tests further demonstrated that strain XB1AT could be differentiated from the closest related Bacteroides species. Xylan and sugars were converted by strain XB1AT mainly into acetate, propionate and succinate. Based on physiological, phenotypic and phylogenetic data, the six novel strains are considered to represent a novel species of the genus Bacteroides, for which the name Bacteroides xylanisolvens sp. nov. is proposed. The type strain is XB1AT (=DSM 18836T =CCUG 53782T).
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Volume 4 (1954)
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Volume 3 (1953)
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Volume 2 (1952)
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Volume 1 (1951)