scholarly journals Pyrobaculum ferrireducens sp. nov., a hyperthermophilic Fe(III)-, selenate- and arsenate-reducing crenarchaeon isolated from a hot spring

2015 ◽  
Vol 65 (Pt_3) ◽  
pp. 851-856 ◽  
Author(s):  
G. B. Slobodkina ◽  
A. V. Lebedinsky ◽  
N. A. Chernyh ◽  
E. A. Bonch-Osmolovskaya ◽  
A. I. Slobodkin
Keyword(s):  
Lattice Strain ◽  
Nature Reserve ◽  
Hot Spring ◽  
Phylogenetic Analyses ◽  
Rrna Gene ◽  
Content Type ◽  
Physiological Properties ◽  
Terrestrial Hot Spring ◽  
Kronotsky Nature Reserve ◽  
The 16S Rrna Gene

A novel hyperthermophilic, anaerobic, archaeon was isolated from a terrestrial hot spring at Uzon Caldera, Kronotsky Nature Reserve, Kamchatka, Russia. The isolate, strain 1860T, grew optimally at 90–95 °C and pH 6.0–7.0. The cells were non-motile straight rods, 1.5–5.0 µm in length, covered with surface-layer lattice. Strain 1860T utilized complex proteinaceous compounds as electron donors and ferrihydrite, Fe(III) citrate, nitrate, thiosulfate, selenite, selenate and arsenate as electron acceptors for growth. The sequence of the 16S rRNA gene of strain 1860T had 97.9–98.7 % similarity with those of members of the genus Pyrobaculum . On the basis of its physiological properties and phylogenetic analyses including in silico genome to genome hybridization, the isolate is considered to represent a novel species, for which the name Pyrobaculum ferrireducens sp. nov. is proposed. The type strain is 1860T ( = DSM 28942T = VKM B-2856T).

scholarly journals Carboxydocella manganica sp. nov., a thermophilic, dissimilatory Mn(IV)- and Fe(III)-reducing bacterium from a Kamchatka hot spring

2012 ◽  
Vol 62 (Pt_4) ◽  
pp. 890-894 ◽  
Author(s):  
G. B. Slobodkina ◽  
A. N. Panteleeva ◽  
T. G. Sokolova ◽  
E. A. Bonch-Osmolovskaya ◽  
A. I. Slobodkin
Keyword(s):  
Hot Spring ◽  
Phylogenetic Analyses ◽  
Optimal Growth ◽  
Kamchatka Peninsula ◽  
Growth Conditions ◽  
Rrna Gene ◽  
Content Type ◽  
Link Type ◽  
Physiological Properties ◽  
Bacterium Strain

A thermophilic, anaerobic, dissimilatory Mn(IV)- and Fe(III)-reducing bacterium (strain SLM 61T) was isolated from a terrestrial hot spring on the Kamchatka peninsula. The cells were straight rods, 0.5–0.6 µm in diameter and 1.0–6.0 µm long, and exhibited tumbling motility by means of peritrichous flagellation. The strain grew at 26–70 °C, with an optimum at 58–60 °C, and at pH 5.5–8.0, with an optimum at pH 6.5. Growth of SLM 61T was observed at 0–2.0 % (w/v) NaCl, with an optimum at 0.5 % (w/v). The generation time under optimal growth conditions was 40 min. Strain SLM 61T grew and reduced Mn(IV), Fe(III) or nitrate with a number of organic acids and complex proteinaceous compounds as electron donors. It was capable of chemolithoautotrophic growth using molecular hydrogen as an electron donor, Fe(III) but not Mn(IV) or nitrate as an electron acceptor and CO2 as a carbon source. It also was able to ferment pyruvate, yeast extract, glucose, fructose, sucrose and maltose. The G+C content of DNA of strain SLM 61T was 50.9 mol%. 16S rRNA gene sequence analysis revealed that the closest relative of the isolated organism was Carboxydocella thermautotrophica 41T (96.9 % similarity). On the basis of its physiological properties and phylogenetic analyses, the isolate is considered to represent a novel species, for which the name Carboxydocella manganica sp. nov. is proposed. The type strain is SLM 61T ( = DSM 23132T  = VKM B-2609T). C. manganica is the first described representative of the genus Carboxydocella that possesses the ability to reduce metals and does not utilize CO.

Thermoanaerobaculum aquaticum gen. nov., sp. nov., the first cultivated member of Acidobacteria subdivision 23, isolated from a hot spring

2013 ◽  
Vol 63 (Pt_11) ◽  
pp. 4149-4157 ◽  
Author(s):  
Nathaniel A. Losey ◽  
Bradley S. Stevenson ◽  
Hans-Jürgen Busse ◽  
Jaap S. Sinninghe Damsté ◽  
W. Irene C. Rijpstra ◽  
...  
Keyword(s):  
Gene Sequence ◽  
Hot Springs ◽  
Hot Spring ◽  
Rrna Gene ◽  
Strictly Anaerobic ◽  
Content Type ◽  
Novel Bacterium ◽  
Fermentative Growth ◽  
Novel Genus And Species ◽  
The 16S Rrna Gene

A novel bacterium was isolated from a freshwater hot spring, the Hale House Spring, located at Hot Springs National Park, Hot Springs, AR, USA. Cells of strain MP-01T stained Gram-negative, were rod-shaped, non-motile, strictly anaerobic and chemo-organotrophic and did not form spores. Growth occurred at 50–65 °C, with an optimum at 60 °C, at pH 6.0–8.0, with an optimum at pH 6.5–7.0, and at NaCl concentrations up to 0.5 % (w/v), with optimum growth in the absence of NaCl. Strain MP-01T was capable of fermentative growth on pyruvate or proteinaceous substrates as well as reducing Fe(III) and Mn(IV). Major fatty acids were iso-C15 : 0, iso-C16 : 0, anteiso-C17 : 0 and iso-C17 : 0. The polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine and the major isoprenoid quinone was MK-10. In the polyamine pattern, sym-homospermidine was the predominant compound. The DNA G+C content was 62.7 mol%. Analysis of the 16S rRNA gene sequence of the isolate indicated that strain MP-01T represents the first reported cultivated member of subdivision 23 of the Acidobacteria . It is proposed that strain MP-01T represents a novel genus and species, for which the name Thermoanaerobaculum aquaticum gen. nov., sp. nov. is proposed. The type strain of Thermoanaerobaculum aquaticum is MP-01T ( = DSM 24856T = JCM 18256T).

Brockia lithotrophica gen. nov., sp. nov., an anaerobic thermophilic bacterium from a terrestrial hot spring

2013 ◽  
Vol 63 (Pt_2) ◽  
pp. 479-483 ◽  
Author(s):  
Anna A. Perevalova ◽  
Ilya V. Kublanov ◽  
R. V. Baslerov ◽  
Gengxin Zhang ◽  
Elizaveta A. Bonch-Osmolovskaya
Keyword(s):  
Hot Spring ◽  
Sequence Similarity ◽  
Optimal Growth ◽  
Thermophilic Bacterium ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Content Type ◽  
Positive Type ◽  
Link Type ◽  
Terrestrial Hot Spring

A novel thermophilic bacterium, strain Kam1851T, was isolated from a terrestrial hot spring of the Uzon Caldera, Kamchatka Peninsula, Russia. Cells of strain Kam1851T were spore-forming rods with a Gram-positive type of cell wall. Growth was observed between 46 and 78 °C, and pH 5.5–8.5. The optimal growth (doubling time, 6.0 h) was at 60–65 °C and pH 6.5. The isolate was an obligate anaerobe growing in pre-reduced medium only. It grew on mineral medium with molecular hydrogen or formate as electron donors, and elemental sulfur, thiosulfate or polysulfide as electron acceptors. The main cellular fatty acids were C16 : 0 (34.2 %), iso-C16 : 0 (18 %), C18 : 0 (12.8 %) and iso-C17 : 0 (11.1 %). The G+C content of the genomic DNA of strain Kam1851T was 63 mol%. 16S rRNA gene sequence analysis showed that strain Kam1851T belonged to the order Thermoanaerobacterales , but it was not closely related to representatives of any genera with validly published names. The most closely related strains, which had no more than 89.2 % sequence similarity, were members of the genera Ammonifex and Caldanaerobacter . On the basis of its phylogenetic position and novel phenotypic features, isolate Kam1851T is proposed to represent a novel species in a new genus, Brockia lithotrophica gen. nov., sp. nov.; the type strain of Brockia lithotrophica is Kam1851T ( = DSM 22653T = VKM B-2685T).

Microbacterium karelineae sp. nov. isolated from a halophyte plant in the Taklamakan desert

2021 ◽  
Vol 71 (2) ◽  
Author(s):  
Qi-hui Zhu ◽  
Cai-ling Yang ◽  
Xiao-xia Luo ◽  
Li-li Zhang ◽  
Zhan-feng Xia
Keyword(s):  
Type Species ◽  
Phylogenetic Analyses ◽  
Rrna Gene ◽  
West China ◽  
Content Type ◽  
Taklamakan Desert ◽  
North West ◽  
Link Type ◽  
Diamino Acid ◽  
The 16S Rrna Gene

A bacterial strain, designated TRM 80801T, was isolated from the Karelinea in Taklamakan desert, Xinjiang Uygur Autonomous Region, north-west China. Cells were Gram-stain-positive, aerobic, non-motile, short rods. Strain TRM 80801T grew at 4–50 °C, with optimum growth at 28 °C, and grew at pH 6.0–11.0 and 1–15 % (w/v) NaCl. Phylogenetic analyses of the 16S rRNA gene sequences placed strain TRM 80801T within the genus Microbacterium with the highest similarities to Microbacterium suaedae YZYP 306T (98.97 %) and Microbacterium indicum BBH6T (98.17 %), respectively. The DNA G+C content of TRM 80801T is 69.38 mol%. The cell-wall peptidoglycan contained the amino acids ornithine, glutamic acid, glycine and alanine, the diagnostic diamino acid was ornithine. The acyl type of the peptidoglycan was glycolyl. Whole-cell sugars were ribose, mannose, glucose, rhamnose and galactose. The major cellular fatty acids were anteiso-C15 : 0, anteiso-C17 : 0 and iso-C16 : 0. The predominant menaquinones were MK-10, MK-11 and MK-12. The polar lipids were diphosphatidylglycerol, phosphatidylglycerol. The whole-genome average nucleotide identity (ANI) value between strain TRM 80801T and Microbacterium suaedae YZYP 306T is 70.2 %. On the basis of the evidence presented in this study, strain TRM 80801T is representative of a novel species in the genus Microbacterium , for which the name Microbacterium karelineae sp. nov. is proposed. The type strain is TRM 80801T (=CCTCC AB 2019248T=KCTC 49357T).

Flavobacterium franklandianum sp. nov. and Flavobacterium gawalongense sp. nov., isolated from glaciers on the Tibetan Plateau

2021 ◽  
Vol 71 (7) ◽  
Author(s):  
Qing Liu ◽  
Hong-Can Liu ◽  
Lei-Lei Yang ◽  
Yu-Hua Xin
Keyword(s):  
Type Species ◽  
Novel Species ◽  
Phylogenetic Analyses ◽  
Rrna Gene ◽  
The Tibetan Plateau ◽  
Content Type ◽  
Link Type ◽  
Taxonomic Research ◽  
Pr China ◽  
The 16S Rrna Gene

The genus Flavobacterium (family Flavobacteriaceae ) can be found in diverse environments. In this study, seven novel strains were isolated from glaciers in PR China and subjected to taxonomic research. Phylogenetic analyses based on the 16S rRNA gene revealed that the strains belonged to the genus Flavobacterium . None of the seven strains grew at temperatures above 22 °C, indicating that they are psychrophilic. Furthermore, the average nucleotide identity (ANI) values of the seven strains were calculated and indicated that they represented two novel species in Flavobacterium . Strain LB3P56T was most closely related to Flavobacterium soyangense IMCC26223T (97.70 %) and strain GSP16T was most closely related to Flavobacterium sinopsychrotolerans 0533T (98.03 %). The ANI values between the two Flavobacterium strains and their closest relatives were less than 83.47 %, which was much lower than the threshold for species delineation of 95–96 %. Therefore, we propose two novel species, Flavobacterium franklandianum sp. nov. (LB3P56T=CGMCC 1.11934T=NBRC 113651T) and Flavobacterium gawalongense sp. nov. (GSP16T=CGMCC 1.24642T=NBRC 113664T).

Halarchaeum rubridurum sp. nov., a moderately acidophilic haloarchaeon isolated from commercial sea salt samples

2013 ◽  
Vol 63 (Pt_9) ◽  
pp. 3143-3147 ◽  
Author(s):  
Yuto Yamauchi ◽  
Hiroaki Minegishi ◽  
Akinobu Echigo ◽  
Yasuhiro Shimane ◽  
Masahiro Kamekura ◽  
...  
Keyword(s):  
Type Species ◽  
Novel Species ◽  
Phylogenetic Analyses ◽  
The Philippines ◽  
Rrna Gene ◽  
16S Rrna Gene Sequences ◽  
Content Type ◽  
Link Type ◽  
Optimum Ph ◽  
The 16S Rrna Gene

Six halo-acidophilic archaeal strains were isolated from four commercial salt samples obtained from seawater in the Philippines, Indonesia (Bali) and Japan (Okinawa) on agar plates at pH 4.5. Cells of the six strains were pleomorphic, and stained Gram-negative. Two strains were pink–red pigmented, while four other strains were orange–pink pigmented. Strain MH1-16-3T was able to grow at 9–30 % (w/v) NaCl [with optimum at 18 % (w/v) NaCl], at pH 4.5–6.8 (optimum, pH 5.5) and at 20–50 °C (optimum, 42 °C). The five other strains grew at slightly different ranges. The six strains required at least 1 mM Mg2+ for growth. The 16S rRNA gene sequences of the six strains were almost identical, sharing 99.9 (1–2 nt differences) to 100 % similarity. The closest relatives were Halarchaeum acidiphilum MH1-52-1T and Halarchaeum salinum MH1-34-1T with 97.7 % similarity. The DNA G+C contents of the six strains were 63.2–63.7 mol%. Levels of DNA–DNA relatedness amongst the six strains were 79–86 %, while those between MH1-16-3T and H. acidiphilum MH1-52-1T and H. salinum MH1-34-1T were both 43 and 45 % (reciprocally), respectively. Based on the phenotypic, genotypic and phylogenetic analyses, it is proposed that the six isolates represent a novel species of the genus Halarchaeum , for which the name Halarchaeum rubridurum sp. nov. is proposed. The type strain is MH1-16-3T ( = JCM 16108T = CECT 7535T).

scholarly journals Discovery of Novel Rickettsiella spp. in Ixodid Ticks from Western Canada

2013 ◽  
Vol 80 (4) ◽  
pp. 1403-1410 ◽  
Author(s):  
Clare A. Anstead ◽  
Neil B. Chilton
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Sequence Type ◽  
Ixodid Ticks ◽  
Rrna Gene ◽  
Western Canada ◽  
Content Type ◽  
The 16S Rrna Gene

ABSTRACTThe genomic DNA from four species of ixodid ticks in western Canada was tested for the presence ofRickettsiellaby PCR analyses targeting the 16S rRNA gene. Eighty-eight percent of theIxodes angustus(n= 270), 43% of theI. sculptus(n= 61), and 4% of theI. kingi(n= 93) individuals examined were PCR positive forRickettsiella, whereas there was no evidence for the presence ofRickettsiellainDermacentor andersoni(n= 45). Three different single-strand conformation polymorphism profiles of the 16S rRNA gene were detected among amplicons derived fromRickettsiella-positive ticks, each corresponding to a different sequence type. Furthermore, each sequence type was associated with a different tick species. Phylogenetic analyses of sequence data of the 16S rRNA gene and three other genes (rpsA,gidA, andsucB) revealed that all three sequence types were placed in a clade that contained species and pathotypes of the genusRickettsiella. The bacterium inI. kingirepresented the sister taxon to theRickettsiellainI. sculptus, and both formed a clade withRickettsiellagryllifrom crickets (Gryllus bimaculatus) and “R. ixodidis” fromI. woodi. In contrast, theRickettsiellainI. angustuswas not a member of this clade but was placed external to the clade comprising the pathotypes ofR. popilliae. The results indicate the existence of at least two new species ofRickettsiella: one inI. angustusand another inI. kingiandI. sculptus. However, theRickettsiellastrains inI. kingiandI. sculptusmay also represent different species because each had unique sequences for all four genes.

scholarly journals Sphaerisporangium rufum sp. nov., an endophytic actinomycete from roots of Oryza sativa L

2014 ◽  
Vol 64 (Pt_4) ◽  
pp. 1077-1082 ◽  
Author(s):  
Ratchanee Mingma ◽  
Kannika Duangmal ◽  
Savitr Trakulnaleamsai ◽  
Arinthip Thamchaipenet ◽  
Atsuko Matsumoto ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Rrna Gene ◽  
Content Type ◽  
Endophytic Actinomycete ◽  
Link Type ◽  
Physiological Properties ◽  
Actinomycete Strain ◽  
Phosphatidylinositol Mannosides ◽  
The 16S Rrna Gene

An endophytic actinomycete, strain R10-82T, isolated from surface-sterilized roots of rice (Oryza sativa L.) was studied using a polyphasic approach. Strain R10-82T produced branching substrate mycelia and developed spherical spore vesicles on aerial hyphae containing non-motile spores. The major cellular fatty acids were iso-C16 : 0, iso-C14 : 0 and 10-methyl C17 : 0. The predominant menaquinones were MK-9, MK-9(H2), MK-9(H4) and MK-9(H6). Rhamnose, ribose, madurose, mannose and glucose were detected in whole-cell hydrolysates. The diagnostic phospholipids were phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylinositol mannosides, hydroxylphosphatidylethanolamine and ninhydrin-positive phosphoglycolipids. These morphological and chemotaxonomic data were similar to those of the genus Sphaerisporangium . Analysis of the 16S rRNA gene sequence revealed that strain R10-82T was related most closely to Sphaerisporangium cinnabarinum JCM 3291T (98.3 % similarity). The DNA G+C content of strain R10-82T was 74 mol%. DNA–DNA relatedness data in combination with differences in the biochemical and physiological properties suggested that strain R10-82T should be classified as representing a novel species of the genus Sphaerisporangium , for which the name Sphaerisporangium rufum is proposed. The type strain is R10-82T ( = BCC 51287T = NBRC 109079T). An emended description of the genus Sphaerisporangium is also provided.

scholarly journals Glycomyces sambucus sp. nov., an endophytic actinomycete isolated from the stem of Sambucus adnata Wall

2007 ◽  
Vol 57 (9) ◽  
pp. 1995-1998 ◽  
Author(s):  
Qiang Gu ◽  
Wen Zheng ◽  
Ying Huang
Keyword(s):  
Type Strain ◽  
Gene Sequence ◽  
Novel Species ◽  
Phylogenetic Analyses ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Physiological Properties ◽  
Phyletic Line ◽  
The 16S Rrna Gene ◽  
Chinese Medicinal Plant

An actinomycete, designated strain E71T, was isolated from the stem of Sambucus adnata Wall, a Chinese medicinal plant, and subjected to a polyphasic taxonomic study. Phylogenetic analyses based on the 16S rRNA gene sequence showed that the organism was a member of the genus Glycomyces, and formed a distinct phyletic line distantly related to recognized species of the genus Glycomyces. Morphological and chemotaxonomic data supported the affiliation of strain E71T to the genus Glycomyces. A number of physiological properties and a unique menaquinone profile allowed differentiation of the strain from related Glycomyces species. It is therefore proposed that strain E71T represents a novel species of the genus Glycomyces, for which the name Glycomyces sambucus sp. nov. is proposed. The type strain is E71T (=CGMCC 4.3147T=DSM 45047T).

Ilumatobacter nonamiense sp. nov. and Ilumatobacter coccineum sp. nov., isolated from seashore sand

2013 ◽  
Vol 63 (Pt_9) ◽  
pp. 3404-3408 ◽  
Author(s):  
Atsuko Matsumoto ◽  
Hiroaki Kasai ◽  
Yoshihide Matsuo ◽  
Yoshikazu Shizuri ◽  
Natsuko Ichikawa ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Type Species ◽  
Phylogenetic Analyses ◽  
Rrna Gene ◽  
Content Type ◽  
Link Type ◽  
Seashore Sand ◽  
The 16S Rrna Gene

Bacterial strains YM16-303T and YM16-304T were isolated from a sample of seashore sand using a medium with an artificial seawater base. Both isolates grew slowly on marine agar, and were found to be Gram-reaction-positive, aerobic, non-motile and rod-shaped. The cell-wall peptidoglycan contained ll-diaminopimelic acid, glycine, alanine and hydroxyglutamic acid, and the acyl type of the muramic acid was glycolyl. The predominant menaquinone was MK-9(H8). The 16S rRNA gene sequences of strains YM16-303T and YM16-304T were most similar to that of Ilumatobacter fluminis YM22-133T, and phylogenetic analyses also indicated that they belong to the genus Ilumatobacter . Ilumatobacter fluminis YM22-133T and strains YM16-303T and YM16-304T should be classified as distinct species in the genus Ilumatobacter , however, since the 16S rRNA gene sequence similarity between them was low and the major cellular fatty acids and some physiological properties were different. Moreover, average nucleotide identity and maximal unique exact matches index values also supported the conclusion that they represent different species. On the basis of the above analyses, two novel species, Ilumatobacter nonamiense sp. nov. (type strain YM16-303T = NBRC 109120T = KCTC 29139T) and Ilumatobacter coccineum sp. nov. (type strain YM16-304T = NBRC 103263T = KCTC 29153T), are proposed. The order Acidimicrobiales , which contains the genus Ilumatobacter , currently includes six genera and only six species, and they are phylogenetically very far from each other. Phylogenetic analyses revealed that strains YM16-303T and YM16-304T clustered with closely related uncultured actinobacteria but not Ilumatobacter fluminis YM22-133T, suggesting that many uncultured bacteria related to these isolates exist in the environment. This is the first report on interspecies relationships in the order Acidimicrobiales .

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