Lysinibacillus contaminans sp. nov., isolated from surface water

2013 ◽  
Vol 63 (Pt_9) ◽  
pp. 3148-3153 ◽  
Author(s):  
Peter Kämpfer ◽  
Karin Martin ◽  
Stefanie P. Glaeser
Keyword(s):  
Fatty Acids ◽  
Surface Water ◽  
16S Rrna ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

A Gram-positive-staining, aerobic, endospore-forming bacterium, isolated as a contamination from an enrichment of enteric bacteria from surface water, was studied using a polyphasic taxonomic approach. 16S rRNA gene sequence similarity comparisons revealed that strain FSt3AT was grouped in the genus Lysinibacillus , most closely related to Lysinibacillus xylanilyticus XDB9T (98.1 %), Lysinibacillus parviboronicapiens BAM-582T and Lysinibacillus sphaericus DSM 28T (both 98.0 %). The 16S rRNA gene sequence similarity to other species of the genus Lysinibacillus was <97.5 %. The allocation to the genus Lysinibacillus was supported by a detailed chemotaxonomic characterization revealing a cell wall containing alanine, glutamic acid, aspartic acid and the diagnostic diamino acid lysine in a molar ratio of 1.6 : 1 : 0.9 : 0.8 (peptidoglycan type A4α), the major menaquinones MK-7 and MK-6, and polar lipids consisting of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, four unknown phospholipids, one unknown aminophospholipid and one unidentified aminolipid. The major fatty acids were iso- and anteiso-branched fatty acids. DNA–DNA hybridizations with the type strains of the most closely related species, L. parviboronicapiens DSM 25242T, L. xylanilyticus DSM 23493T and L. sphaericus DSM 28T, in addition to the results of physiological and biochemical tests, allowed genotypic and phenotypic differentiation of strain FSt3AT from these related species. Thus, FSt3AT represents a novel species of the genus Lysinibacillus , for which the name Lysinibacillus contaminans sp. nov. is proposed, with FSt3AT ( = CCM 8383T = DSM 25560T = CIP 110362T) as the type strain.

Paenibacillus vulneris sp. nov., isolated from a necrotic wound

2013 ◽  
Vol 63 (Pt_2) ◽  
pp. 777-782 ◽  
Author(s):  
Stefanie P. Glaeser ◽  
Enevold Falsen ◽  
Hans-Jürgen Busse ◽  
Peter Kämpfer
Keyword(s):  
Fatty Acids ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

A Gram-positive-staining, aerobic, endospore-forming bacterium, isolated from a necrotic wound of a 35-year-old man was studied in detail to determine its taxonomic position. Based on 16S rRNA gene sequence similarity comparisons, strain CCUG 53270T was grouped into the genus Paenibacillus , most closely related to the type strains of Paenibacillus rigui (97.2 %), Paenibacillus xylanisolvens (96.3 %) and Paenibacillus chinjuensis (96.1 %). The 16S rRNA gene sequence similarity to strains of other Paenibacillus species was ≤96 %. Chemotaxonomic characterization supported the allocation of the strain to the genus Paenibacillus . The major menaquinones were MK-7 (85 %) and MK-6 (15 %). The polar lipid profile contained the major compounds diphosphatidylglycerol, phosphatidylmonomethylethanolamine, phosphatidylethanolamine and phosphatidylglycerol. The polyamine pattern contained predominantly spermidine. The major fatty acids were iso- and anteiso-branched fatty acids. The results of physiological and biochemical tests allowed phenotypic differentiation of strain CCUG 53270T from closely related species. Thus, strain CCUG 53270T represents a novel species of the genus Paenibacillus , for which the name Paenibacillus vulneris sp. nov. is proposed, with CCUG 53270T ( = JCM 18268T) as the type strain.

Sphingomonas aerophila sp. nov. and Sphingomonas naasensis sp. nov., isolated from air and soil, respectively

2014 ◽  
Vol 64 (Pt_3) ◽  
pp. 926-932 ◽  
Author(s):  
Soo-Jin Kim ◽  
Ji-Young Moon ◽  
Jun-Muk Lim ◽  
Jae-Hyung Ahn ◽  
Hang-Yeon Weon ◽  
...  
Keyword(s):  
Fatty Acids ◽  
16S Rrna ◽  
Type Strain ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

Two strains, designated 5413J-26T and KIS18-15T, were isolated from the air and forest soil, respectively, in South Korea. Cells of the two strains were Gram-stain-negative, aerobic, polar-flagellated and rod-shaped. According to the phylogenetic tree, strains 5413J-26T and KIS18-15T fell into the cluster of Sphingomonas sensu stricto. Strain 5413J-26T showed the highest sequence similarities with Sphingomonas trueperi LMG 2142T (96.6 %), Sphingomonas molluscorum KMM 3882T (96.5 %), Sphingomonas azotifigens NBRC 15497T (96.3 %) and Sphingomonas pituitosa EDIVT (96.1 %), while strain KIS18-15T had the highest sequence similarity with Sphingomonas soli T5-04T (96.8 %), Sphingomonas pituitosa EDIVT (96.6 %), Sphingomonas leidyi ATCC 15260T (96.6 %), Sphingomonas asaccharolytica NBRC 15499T (96.6 %) and Sphingomonas koreensis JSS26T (96.6 %). The 16S rRNA gene sequence similarity between strains 5413J-26T and KIS18-15T was 95.4 %. Ubiquinone 10 was the predominant respiratory quinone and homospermidine was the major polyamine. The major polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and several unidentified phospholipids and lipids. The main cellular fatty acids (>10 % of the total fatty acids) of strain 5413J-26T were summed feature 8 (C18 : 1ω6c and/or C18 : 1ω7c), summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH) and C14 : 0 2-OH, and those of strain KIS18-15T were summed feature 8 and C16 : 0. Based on the results of 16S rRNA gene sequence analysis, and physiological and biochemical characterization, two novel species with the suggested names Sphingomonas aerophila sp. nov. (type strain 5413J-26T = KACC 16533T = NBRC 108942T) and Sphingomonas naasensis sp. nov. (type strain KIS18-15T = KACC 16534T = NBRC 108943T) are proposed.

Algoriphagus zhangzhouensis sp. nov., isolated from mangrove sediment

2013 ◽  
Vol 63 (Pt_5) ◽  
pp. 1621-1626 ◽  
Author(s):  
Caiyun Yang ◽  
Yi Li ◽  
Qian Guo ◽  
Qiliang Lai ◽  
Tianling Zheng ◽  
...  
Keyword(s):  
Fatty Acids ◽  
16S Rrna ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Mangrove Sediment ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

A Gram-negative, short-rod-shaped and non-motile bacterium, strain 12C11T, was isolated from an oil-degrading consortium, enriched from the Fugong mangrove sediment, Fujian Province of China. Optimum growth was observed at 25 °C, at pH 7.5 and with 4 % (w/v) NaCl. Comparative 16S rRNA gene sequence analysis demonstrated that it shared highest similarity with members of the genus Algoriphagus (97.5–93.4 %), exhibiting 97.5 % sequence similarity to Algoriphagus ornithinivorans IMSNU 14014T, followed by Algoriphagus vanfongensis KMM 6241T (97.2 %); it shared <96.0 % sequence similarity with other members of the genus. Levels of nucleotide sequence similarity between gyrB (DNA gyrase subunit B) genes of strain 12C11T and A. vanfongensis KMM 6241T, A. ornithinivorans IMSNU 14014T, Algoriphagus marincola SW-2T and Algoriphagus hitonicola 7-UAHT were 78.8, 78.6, 75.6 and 77.4 %, respectively. Phylogenetic trees based on these housekeeping genes showed that strain 12C11T and other Algoriphagus strains formed a distinct lineage. The dominant fatty acids were iso-C15 : 0 (32.1 %), C16 : 1ω7c/C16 : 1ω6c (11.6 %), iso-C17 : 1 I/anteiso-C17 : 1 B (10.1 %), iso-C17 : 0 3-OH (9.2 %) and iso-C17 : 1ω9c/C16 : 0 10-methyl (7.1 %), which accounted for 70.0 % of the total fatty acids. DNA–DNA hybridization showed that strain 12C11T shared low DNA–DNA relatedness with A. vanfongensis KMM 6241T and A. ornithinivorans IMSNU 14014T (30.7±0.9 and 30.5±1.8 %, respectively). The G+C content of the chromosomal DNA of strain 12C11T was 38.4 mol%. The major respiratory quinones were MK-7 (96.0 %) and MK-6 (4.0 %). According to its morphology, physiology, fatty acid composition and 16S rRNA gene sequence data, the novel strain most appropriately belongs to the genus Algoriphagus , but can readily be distinguished from known Algoriphagus species. The name Algoriphagus zhangzhouensis sp. nov. is proposed (type strain 12C11T = CGMCC 1.11027T = MCCC 1F01099T = DSM 25035T).

Alicyclobacillus consociatus sp. nov., isolated from a human clinical specimen

2013 ◽  
Vol 63 (Pt_10) ◽  
pp. 3623-3627 ◽  
Author(s):  
Stefanie P. Glaeser ◽  
Enevold Falsen ◽  
Karin Martin ◽  
Peter Kämpfer
Keyword(s):  
Fatty Acids ◽  
16S Rrna ◽  
Type Strain ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

A Gram-stain-positive, aerobic organism, isolated from a blood sample from a 51-year-old woman, was studied for its taxonomic position. Based on 16S rRNA gene sequence similarity comparisons, strain CCUG 53762T was grouped into the genus Alicyclobacillus , most closely related to the type strain of Alicyclobacillus pohliae (94.7 %). The 16S rRNA gene sequence similarity to other species of the genus Alicyclobacillus was ≤91 % and similarity to species of the genus Tumebacillus was 91.3–93 %. The occurrence of menaquinone MK-7 as the major respiratory quinone, meso-diaminopimelic acid as the diagnostic diamino acid of the cell wall and the fatty acid profile supported the allocation of the strain to the genus Alicyclobacillus . Major fatty acids were iso- and anteiso-branched fatty acids. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and three unknown phospholipids. The absence of the iso-branched fatty acids iso-C16 : 0 and iso-C17 : 0 allowed differentiation of strain CCUG 53762T from A. pohliae CIP 109385T. In addition, the results of physiological and biochemical tests also allowed phenotypic differentiation of strain CCUG 53762T from this most closely related species. The G+C content of the DNA was 47 mol%. Strain CCUG 53762T therefore represents a novel species of the genus Alicyclobacillus , for which we propose the name Alicyclobacillus consociatus sp. nov., with CCUG 53762T ( = CCM 8439T) as the type strain.

scholarly journals Faecalicoccus acidiformans gen. nov., sp. nov., isolated from the chicken caecum, and reclassification of Streptococcus pleomorphus (Barnes et al. 1977), Eubacterium biforme (Eggerth 1935) and Eubacterium cylindroides (Cato et al. 1974) as Faecalicoccus pleomorphus comb. nov., Holdemanella biformis gen. nov., comb. nov. and Faecalitalea cylindroides gen. nov., comb. nov., respectively, within the family Erysipelotrichaceae

2014 ◽  
Vol 64 (Pt_11) ◽  
pp. 3877-3884 ◽  
Author(s):  
Celine De Maesschalck ◽  
Filip Van Immerseel ◽  
Venessa Eeckhaut ◽  
Siegrid De Baere ◽  
Margo Cnockaert ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

Strains LMG 27428T and LMG 27427 were isolated from the caecal content of a chicken and produced butyric, lactic and formic acids as major metabolic end products. The genomic DNA G+C contents of strains LMG 27428T and LMG 27427 were 40.4 and 38.8 mol%. On the basis of 16S rRNA gene sequence similarity, both strains were most closely related to the generically misclassified Streptococcus pleomorphus ATCC 29734T. Strain LMG 27428T could be distinguished from S. pleomorphus ATCC 29734T based on production of more lactic acid and less formic acid in M2GSC medium, a higher DNA G+C content and the absence of activities of acid phosphatase and leucine, arginine, leucyl glycine, pyroglutamic acid, glycine and histidine arylamidases, while strain LMG 27428 was biochemically indistinguishable from S. pleomorphus ATCC 29734T. The novel genus Faecalicoccus gen. nov. within the family Erysipelotrichaceae is proposed to accommodate strains LMG 27428T and LMG 27427. Strain LMG 27428T ( = DSM 26963T) is the type strain of Faecalicoccus acidiformans sp. nov., and strain LMG 27427 ( = DSM 26962) is a strain of Faecalicoccus pleomorphus comb. nov. (type strain LMG 17756T = ATCC 29734T = DSM 20574T). Furthermore, the nearest phylogenetic neighbours of the genus Faecalicoccus are the generically misclassified Eubacterium cylindroides DSM 3983T (94.4 % 16S rRNA gene sequence similarity to strain LMG 27428T) and Eubacterium biforme DSM 3989T (92.7 % 16S rRNA gene sequence similarity to strain LMG 27428T). We present genotypic and phenotypic data that allow the differentiation of each of these taxa and propose to reclassify these generically misnamed species of the genus Eubacterium formally as Faecalitalea cylindroides gen. nov., comb. nov. and Holdemanella biformis gen. nov., comb. nov., respectively. The type strain of Faecalitalea cylindroides is DSM 3983T = ATCC 27803T = JCM 10261T and that of Holdemanella biformis is DSM 3989T = ATCC 27806T = CCUG 28091T.

Caldicellulosiruptor diazotrophicus sp. nov., a thermophilic, nitrogen-fixing fermentative bacterium isolated from a terrestrial hot spring in Japan

2021 ◽  
Vol 71 (9) ◽  
Author(s):  
Yuxin Chen ◽  
Arisa Nishihara ◽  
Takao Iino ◽  
Moriya Ohkuma ◽  
Shin Haruta
Keyword(s):  
Fatty Acids ◽  
16S Rrna ◽  
Type Species ◽  
Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Cellular Fatty Acids ◽  
Link Type ◽  
The 16S Rrna Gene

A novel nitrogen-fixing fermentative bacterium, designated as YA01T, was isolated from Nakabusa hot springs in Japan. The short-rod cells of strain YA01T were Gram-positive and non-sporulating. Phylogenetic trees of the 16S rRNA gene sequence and concatenated sequences of 40 single-copy ribosomal genes revealed that strain YA01T belonged to the genus Caldicellulosiruptor and was closely related to Caldicellulosiruptor hydrothermalis 108T, Caldicellulosiruptor bescii DSM 6725T and Caldicellulosiruptor kronotskyensis 2002T. The 16S rRNA gene sequence of strain YA01T shares less than 98.1 % identity to the known Caldicellulosiruptor species. The G+C content of the genomic DNA was 34.8 mol%. Strain YA01T shares low genome-wide average nucleotide identity (90.31–91.10 %), average amino acid identity (91.45–92.10 %) and <70 % digital DNA–DNA hybridization value (41.8–44.2 %) with the three related species of the genus Caldicellulosiruptor . Strain YA01T grew at 50–78 °C (optimum, 70 °C) and at pH 5.0–9.5 (optimum, pH 6.5). Strain YA01T mainly produced acetate by consuming d(+)-glucose as a carbon source. The main cellular fatty acids were iso-C17 : 0 (35.7 %), C16 : 0 (33.3 %), DMA16 : 0 (6.6 %) and iso-C15 : 0 (5.9 %). Based on its distinct phylogenetic position, biochemical and physiological characteristics, and the major cellular fatty acids, strain YA01T is considered to represent a novel species of the genus Caldicellulosiruptor for which the name Caldicellulosiruptor diazotrophicus sp. nov. is proposed (type strain YA01T=DSM 112098T=JCM 34253T).

scholarly journals Cellulomonas rhizosphaerae sp. nov., a novel actinomycete isolated from soil

2019 ◽  
Vol 69 (4) ◽  
pp. 1001-1008 ◽  
Author(s):  
Yuanyuan Tian ◽  
Chuanyu Han ◽  
Jiangmeihui Hu ◽  
Junwei Zhao ◽  
Chen Zhang ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

A novel actinomycete, designated strain NEAU-TCZ24T, was isolated from soil and characterized using a polyphasic approach. The results of phylogenetic analysis based on the 16S rRNA gene sequence indicated that the organism should be assigned to the genus Cellulomonas and formed a stable clade with its closest relatives Cellulomonas terrae JCM 14899T (98.4 % 16S rRNA gene sequence similarity), Cellulomonas xylanilytica JCM 14281T (97.9 %) and Cellulomonas humilata JCM 11945T (97.7 %). The major menaquinones were identified as MK-9(H4) and MK-8(H4). The phospholipid profile was found to contain diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositolmannoside, a ninhydrin-positiveglycolipid, an unidentified phosphoglycolipid, an unidentified phospholipid and an unidentified lipid. The major fatty acids were identified as anteiso-C15 : 0, C18 : 1ω9c, C16 : 0 and anteiso-C17 : 0. Moreover, morphological and chemotaxonomic properties of NEAU-TCZ24T also confirmed the affiliation of the isolate to the genus Cellulomonas . However, multilocus sequence analysis based on five other house-keeping genes (gyrB, rpoB, recA, relA and atpD), DNA–DNA relatedness, physiological and biochemical data indicated that NEAU-TCZ24T could be distinguished from its closest relatives. Therefore, it is proposed that NEAU-TCZ24T represents a novel species of the genus Cellulomonas , for which the name Cellulomonas rhizosphaerae sp. nov. is proposed. The type strain is NEAU-TCZ24T (=CCTCC AA 2018042T=JCM 32383T).

Paenibacillus allorhizosphaerae sp. nov., from soil of the rhizosphere of Zea mays

2021 ◽  
Vol 71 (10) ◽  
Author(s):  
Peter Kämpfer ◽  
Hans-Jürgen Busse ◽  
John A. McInroy ◽  
Dominique Clermont ◽  
Alexis Criscuolo ◽  
...  
Keyword(s):  
Zea Mays ◽  
16S Rrna ◽  
Type Strain ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

A Gram-stain-positive, aerobic, endospore-forming bacterial strain, isolated from the rhizosphere of Zea mays, was studied for its detailed taxonomic allocation. Based on 16S rRNA gene sequence similarity comparisons, strain JJ-447T was shown to be a member of the genus Paenibacillus , most closely related to the type strain of Paenibacillus solanacearum (97.8 %). The 16S rRNA gene sequence similarity values to all other Paenibacillus species were below 97.0 %. DNA–DNA hybridization (DDH) values with the type strain of P. solanacearum were 35.9 % (reciprocal 27%), respectively. The average nucleotide identity and in silico DDH values with the type strain of P. solanacearum were 84.86 and 28.9 %, respectively. The quinone system of strain JJ-447T consisted exclusively of menaquinones and the major component was MK-7 (96.4 %) but minor amounts of MK–6 (3.6 %) were detected as well. The polar lipid profile consisted of the major components diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and an unidentified aminolipid. Major fatty acids were iso- and anteiso-branched with the major compounds anteiso-C15 : 0 and iso-C15 : 0. Physiological and biochemical characteristics allowed a further phenotypic differentiation of strain JJ-447T from the most closely related species on the basis of d-glucose, l-arabinose and d-mannose assimilation and other physiological tests. Thus, JJ-447T represents a novel species of the genus Paenibacillus , for which the name Paenibacillus allorhizosphaerae sp. nov. is proposed, with JJ-447T (=LMG 31601T=CCM 9021T=CIP 111802T) as the type strain.

Phocaeicola faecicola sp. nov., isolated from porcine faeces

2021 ◽  
Vol 71 (9) ◽  
Author(s):  
Ji Young Choi ◽  
Seung-Hyeon Choi ◽  
Jam-Eon Park ◽  
Ji-Sun Kim ◽  
Jiyoung Lee ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

An obligately anaerobic, non-motile, Gram-negative and rod-shaped strain (AGMB03916T) was isolated from faeces of a 2-week-old piglet raised at the National Institute of Animal Science in Wanju, Republic of Korea. Growth of strain AGMB03916T occurred at 30–45 °C (optimum, 37 °C), at pH 6–9 (optimum, pH 8) and in the presence of 0.5–1.0 % (w/v) NaCl. Based on the results of 16S rRNA gene sequence analyses, strain AGMB03916T was closely related to two validly published species of the genus Phocaeicola , Phocaeicola plebeius and Phocaeicola coprocola . The 16S rRNA gene sequence similarity of strain AGMB03916T compared to P. plebeius M12T (=KCTC 5793T) and P. coprocola M16T (=KCTC 5443T) were 96.3 and 95.0 %, respectively. The genomic DNA G+C content of strain AGMB03916T was 46.4 mol%. The average nucleotide identity values between strain AGMB03916T and the reference strains were 74.9–78.5 %. Cells were able to utilize d-glucose, lactose, sucrose, maltose, salicin, aesculin hydrolysis, cellobiose and raffinose. The major end product of metabolism was acetate. The major cellular fatty acids (>10 %) of the isolate were iso-C15 : 0, anteiso-C15 : 0, C16 : 0, C16 : 0 3-OH and summed feature 11 (iso-C17 : 0 3-OH and/or C18 : 2 DMA). On the basis of the genotypic, biochemical, chemotaxonomic, phenotypic and phylogenetic data, strain AGMB03916T represents a novel species of the genus Phocaeicola , for which the name Phocaeicola faecicola sp. nov. is proposed. The type strain is AGMB03916T (=KCTC 25014T=GDMCC 1.2574T).

Rhodomicrobium udaipurense sp. nov., a psychrotolerant, phototrophic alphaproteobacterium isolated from a freshwater stream

2013 ◽  
Vol 63 (Pt_7) ◽  
pp. 2684-2689 ◽  
Author(s):  
V. Venkata Ramana ◽  
P. Shalem Raj ◽  
L. Tushar ◽  
Ch. Sasikala ◽  
Ch. V. Ramana
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Dna Hybridization ◽  
Type Species ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type

Two strains (JA643T and JA755) of Gram-stain-negative, facultatively anaerobic phototrophic, bacteria capable of growth at low temperatures (10–15 °C) were isolated from freshwater streams from different geographical regions of India. Both strains contain bacteriochlorophyll a and carotenoids of the spirilloxanthin series. Phosphatidylethanolamine, phosphatidylcholine, phosphatidylglycerol, diphosphatidylglycerol, an unidentified phospholipid (PL), unidentified amino lipids (AL1–AL6, AL9) and an unidentified lipid (L1) were the polar lipids present in both strains. The major cellular fatty acid was C18 : 1ω7c (76–79 % of the total). Bacteriohopane derivatives (BHD1,2), unidentified hopanoids (UH1–5), diplopterol (DPL) and diploptene (DPE) were the major hopanoids of both strains. The DNA G+C content was 64.2–64.5 mol%. 16S rRNA gene sequence-based phylogenetic analysis showed that both strains are closely related to the genus Rhodomicrobium and clustered with Rhodomicrobium vannielii DSM 162T (99 % sequence similarity). However, both strains exhibited only 46.1 % DNA–DNA hybridization with R. vannielii DSM 162T. Strains JA643T and JA755 shared >99 % 16S rRNA gene sequence similarity and were >85 % related on the basis of DNA–DNA hybridization; they are therefore considered to represent a novel species in the genus Rhodomicrobium , for which the name Rhodomicrobium udaipurense sp. nov. is proposed. The type strain is JA643T ( = KCTC 15219T = NBRC 109057T).

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