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transfer of "pseudomonas riboflavina" (foster 1944), a gram-negative, motile rod with long-chain 3-hydroxy fatty acids, to devosia riboflavina gen. nov., sp. nov., nom. rev.the taxonomic position of "pseudomonas riboflavina" was studied by 16s rrna gene sequencing and chemotaxonomic methods. this organism is a gram-negative, strictly aerobic rod and has a dna guanine-plus-cytosine content of 61.4 mol%; the major isoprenoid quinone is ubiquinone 10, and the unusual cellular fatty acids 3-hydroxytetracosenoic acid (3-oh 24:1) and 3-hydroxyhexacosenoic acid (3-oh 26:1) are the major 3-hydroxy cellular fatty acids. a phylogenetic analysis based on 16s rrna sequences re ...19968573489
a new species of devosia that forms a unique nitrogen-fixing root-nodule symbiosis with the aquatic legume neptunia natans (l.f.) druce.rhizobia are the common bacterial symbionts that form nitrogen-fixing root nodules in legumes. however, recently other bacteria have been shown to nodulate and fix nitrogen symbiotically with these plants. neptunia natans is an aquatic legume indigenous to tropical and subtropical regions and in african soils is nodulated by allorhizobium undicola. this legume develops an unusual root-nodule symbiosis on floating stems in aquatic environments through a unique infection process. here, we analyzed ...200212406707
description of devosia neptuniae sp. nov. that nodulates and fixes nitrogen in symbiosis with neptunia natans, an aquatic legume from india.neptunia natans is a unique aquatic legume indigenous to tropical and sub-tropical regions and is nodulated symbiotically by rhizobia using an unusual infection process unlike any previously described. previously, isolates of neptunia-nodulating rhizobia from senegal were characterized as allorhizobium undicola. here we report on a different group of neptunia-nodulating rhizobia isolated from india. sequencing of the 16s rdna gene from two of these indian isolates (strains j1t and j2) show that ...200312747409
changing concepts in the systematics of bacterial nitrogen-fixing legume symbionts.as of february 2003, bacteria that form nitrogen-fixing symbiotic associations with legumes have been confirmed in 44 species of 12 genera. phylogenies of these taxa containing legume symbionts based on the comparative analysis of 16s rdna sequences show that they are not clustered in one lineage but are distributed in the classes alphaproteobacteria and betaproteobacteria, and dispersed over the following nine monophyletic groups, being intermingled with other taxa that do not contain legume sy ...200312949698
identification of the bacterial endosymbionts of the marine ciliate euplotes magnicirratus (ciliophora, hypotrichia) and proposal of 'candidatus devosia euplotis'.this paper reports the identification of bacterial endosymbionts that inhabit the cytoplasm of the marine ciliated protozoon euplotes magnicirratus. ultrastructural and full-cycle rrna approaches were used to reveal the identity of these bacteria. based on analysis of 16s rrna gene sequences, evolutionary trees were constructed; these placed the endosymbiont in the genus devosia in the alpha-proteobacteria. the validity of this finding was also shown by fluorescence in situ hybridization with a ...200415280284
devosia limi sp. nov., isolated from a nitrifying inoculum.a gram-negative, rod-shaped, non-spore-forming bacteria was isolated from a nitrifying inoculum. on the basis of 16s rrna gene sequence similarity, this strain, designated lmg 22951(t), was shown to belong to the 'alphaproteobacteria' and to be related to devosia neptuniae (97.4%) and devosia riboflavina (97.0%). the results of dna-dna hybridization, analysis of fatty acid composition, sds-page, physiological and biochemical tests allowed genotypic and phenotypic differentiation of lmg 22951(t) ...200516166701
[evolution and phylogeny of rhizobia].nitrogen fixation an ancient process that may is have originated in the archaean eon under the primitive atmosphere anoxygenic conditions. diazotrophy is an exclusive process of prokaryotes, only euryarchaeota and 6 of 54 bacteria phyla have diazotrophs lineages. some of them coevolved with flowering plants for the establishment of molecular bases of a mutualistic symbiosis relationship. in rhizobia, the nitrogen fixation occurs inside the nodules, special structures on the roots or stems of leg ...200517061545
devosia soli sp. nov., isolated from greenhouse soil in korea.a gram-negative, obligately aerobic, rod-shaped bacterium was isolated from greenhouse soil used to cultivate lettuce. the strain, gh2-10t, was characterized on the basis of phenotypic and genotypic data. 16s rrna gene sequence analysis revealed that the isolate belonged to the genus devosia, with highest sequence similarity (98.5%) to devosia riboflavina ifo 13584t. sequence similarities with other strains tested were below 97.0%. strain gh2-10t had q-10 as the predominant ubiquinone and c18:1o ...200617082412
sneathiella chinensis gen. nov., sp. nov., a novel marine alphaproteobacterium isolated from coastal sediment in qingdao, china.the taxonomic position of strain lmg 23452(t), which was isolated from coastal sediment from an aquaculture site near qingdao, china, in 2000, was determined. strain lmg 23452(t) comprised gram-negative, non-spore-forming, motile rods and was found to be a halotolerant, aerobic, chemoheterotroph that produces catalase and oxidase. comparative 16s rrna gene sequence analysis revealed that strain lmg 23452(t) shared approximately 89 % sequence similarity with members of the genera devosia, hyphomo ...200717220452
devosia insulae sp. nov., isolated from soil, and emended description of the genus devosia.a gram-negative, motile, aerobic and oval- or rod-shaped bacterial strain, ds-56(t), which is phylogenetically closely related to the genus devosia, was isolated from soil from dokdo, korea. strain ds-56(t) grew optimally at ph 6.5-7.5 and 25 degrees c in the presence of 0.5 % (w/v) nacl. a neighbour-joining phylogenetic tree based on 16s rrna gene sequences showed that strain ds-56(t) joins the cluster comprising devosia species, at a bootstrap resampling value of 100 %. the levels of 16s rrna ...200717551048
devosia subaequoris sp. nov., isolated from beach sediment.a novel marine bacterium was isolated from a sediment sample from hwasun beach in jeju, republic of korea. the cells were found to be gram-negative, aerobic, oxidase-positive, catalase-positive, motile rods. the organism required natural seawater or artificial sea salts for growth. the temperature and ph ranges for growth were 20-42 degrees c and ph 5.1-12.1, respectively. phylogenetic analyses based on 16s rrna gene sequences showed that the organism belonged to the order rhizobiales and formed ...200717911285
devosia geojensis sp. nov., isolated from diesel-contaminated soil in korea.a gram-negative, strictly aerobic, non-spore-forming bacterium, designated strain bd-c194(t), was isolated from diesel-contaminated soil in geoje, korea. the cells were short, motile rods with single polar flagella. growth of strain bd-c194(t) was observed between 15 and 45 degrees c (optimally at 30-35 degrees c) and between ph 6.0 and 9.5 (optimally at ph 7.5-9.0). the predominant fatty acids were 11-methyl c(18 : 1)omega7c, c(16 : 0), c(18 : 1)omega7c, c(18 : 0) and an unknown fatty acid (equ ...200818319469
devosia chinhatensis sp. nov., isolated from a hexachlorocyclohexane (hch) dump site in india.a gram-negative, motile, rod-shaped and non-spore-forming bacterium was isolated from a soil sample collected from the area adjoining an india pesticide limited plant, lucknow, india. strain ipl18t was characterized on the basis of phenotypic and genotypic data. based on 16s rrna gene sequence analysis, this strain was shown to belong to genus devosia, with highest sequence similarity of 97.5 % to devosia riboflavina dsm 7230t. a neighbour-joining phylogenetic tree based on 16s rrna gene sequenc ...200818398183
pseudoxanthobacter soli gen. nov., sp. nov., a nitrogen-fixing alphaproteobacterium isolated from soil.a gram-type negative or variable, aerobic, rod-shaped, nitrogen-fixing bacterium, designated strain cc4(t), was isolated on nutrient agar from a soil sample collected at a regional agricultural research field station located in kaohsiung county, taiwan. 16s rrna gene sequence analysis demonstrated that this isolate is unique, showing <92.5 % similarity with respect to species of the genera xanthobacter (maximum of 92.2 % similarity), prosthecomicrobium (92.0 %), devosia (91.9 %), kaistia (91.9 % ...200818599697
cucumibacter marinus gen. nov., sp. nov., a marine bacterium in the family hyphomicrobiaceae.a gram-negative, rod-shaped, strictly aerobic micro-organism, designated strain cl-gr60(t), was isolated from coastal seawater from the east sea, korea. a 16s rrna gene sequence analysis revealed a clear affiliation with the family hyphomicrobiaceae. phylogenetic analyses showed that strain cl-gr60(t) formed a robust cluster with the species of the genus devosia at sequence similarity levels of 91.1-93.1 %; no other species in the family hyphomicrobiaceae shared more than 90 % sequence similarit ...200818599700
rhizobium multihospitium sp. nov., isolated from multiple legume species native of xinjiang, china.thirty-one rhizobial strains isolated from nodules of legumes native of xinjiang, china, were characterized. these strains were classified as belonging to the genus rhizobium based on amplified 16s rdna restriction analysis (ardra). the strains were distinguished from recognized rhizobium species using analysis of 16s-23s rdna intergenic spacers (igs-rflp), sds-page analysis of whole proteins and box-pcr; the test strains always formed a distinct cluster with patterns that were quite different f ...200818599718
[beta-proteorhizobia and nonrhizobial species--a review].the terms alpha- and beta-rhizobia were proposed to distinguish the rhizobial alpha- and beta-proteorhizobia respectively. in this review we present recently development of rhizobial taxonomy about beta-rhizobia in the genus burkholeria, cupriavidus isolated from mimosa and alpha-proteorhizobia belonging to methylobacterium, devosia, ochrobactrum, phyllobacterium and blastobacter lineage. furthermore, we also introduced the evolution of symbiosis related genes such as noda and nifh, and posed so ...200819160827
maritalea myrionectae gen. nov., sp. nov., isolated from a culture of the marine ciliate myrionecta rubra.a gram-negative, rod-shaped, strictly aerobic bacterium, designated strain cl-sk30(t), was isolated from a culture of the marine ciliate myrionecta rubra. 16s rrna gene sequence analysis revealed that strain cl-sk30(t) was most closely related to cucumibacter marinus (92.0 % similarity) and next to the type strains of species of the genus devosia (89.8-91.3 % similarities) in the family hyphomicrobiaceae. phylogenetic analyses of the 16s rrna gene sequences showed that strain cl-sk30(t) formed a ...200919244448
devosia albogilva sp. nov. and devosia crocina sp. nov., isolated from a hexachlorocyclohexane dump site.two bacterial strains, ipl15(t) and ipl20(t), isolated from a hexachlorocyclohexane dump site in india, were characterized by using a polyphasic approach. based on 16s rrna gene sequence analysis, both strains belonged to the genus devosia; highest sequence similarities of strain ipl15(t) were observed with devosia neptuniae j1(t) and devosia geojensis bd-c194(t) (96.2 % in each case) and the highest sequence similarity of strain ipl20(t) was observed with devosia soli gh2-10(t) (98.6 %). phylog ...200919329609
zhangella mobilis gen. nov., sp. nov., a new member of the family hyphomicrobiaceae isolated from coastal seawater.a gram-negative, pale-yellow, non-spore-forming bacterium, motile with single polar flagella, strain e6t, was isolated from coastal seawater collected from tianjin, china, and its taxonomic position was investigated using a polyphasic approach. strain e6t requires nacl for growth and grows optimally at ph 8.2 and 36 degrees c and in the presence of 2.0% (w/v) nacl. it is positive for catalase and oxidase, and reduces nitrate to nitrite. the major fatty acids (>10%) are c18:1omega7c (64.71%) and ...200919620375
devosia yakushimensis sp. nov., isolated from root nodules of pueraria lobata (willd.) ohwi.a gram-negative, strictly aerobic bacterium, comprising non-endospore-forming motile rods (1.2-2.0 microm x 0.4-0.6 microm) with polar flagellae was isolated from root nodules of the leguminous plant pueraria lobata (willd.) ohwi growing on the coast of yakushima island, kagoshima prefecture, japan. the novel strain, designated yak96b(t), grew at an optimum ph of 7.0 and an optimum temperature of 28 degrees c. phylogenetic analysis based on the 16s rrna gene sequences revealed that the new strai ...201019654342
reclassification of the polyphyletic genus prosthecomicrobium to form two novel genera, vasilyevaea gen. nov. and bauldia gen. nov. with four new combinations: vasilyevaea enhydra comb. nov., vasilyevaea mishustinii comb. nov., bauldia consociata comb. nov. and bauldia litoralis comb. nov.species of the genus prosthecomicrobium are noted for their numerous cellular appendages or prosthecae that extend from the cells. this investigation confirms that the genus is polyphyletic based on an extensive analysis of the 16s rrna gene sequences of several named species of the genus. the analyses indicate that some prosthecomicrobium species are more closely related to non-prosthecate genera, including devosia, labrenzia, blastochloris, methylosinus, mesorhizobium and kaistia, than they ar ...201020118292
pyrosequencing reveals a highly diverse and cultivar-specific bacterial endophyte community in potato roots.in this study, we examined the bacterial endophyte community of potato (solanum tuberosum) cultivar/clones using two different molecular-based techniques (bacterial automated ribosomal intergenic spacer analysis (b-arisa) and pyrosequencing). b-arisa profiles revealed a significant difference in the endophytic community between cultivars (permanova, p < 0.001), and canonical correspondence analysis showed a significant correlation between the community structure and plant biomass (p = 0.001). py ...201020414647
isolation, genetic and functional characterization of novel soil nirk-type denitrifiers.denitrification, the reduction of nitrogen oxides (no(3)(-) and no(2)(-)) to n(2) via the intermediates no and n(2)o, is crucial for nitrogen turnover in soils. cultivation-independent approaches that applied nitrite reductase genes (nirk/nirs) as marker genes to detect denitrifiers showed a predominance of genes presumably derived from as yet uncultured organisms. however, the phylogenetic affiliation of these organisms remains unresolved since the ability to denitrify is widespread among phylo ...201020675088
pelagibacterium halotolerans gen. nov., sp. nov. and pelagibacterium luteolum sp. nov., novel members of the family hyphomicrobiaceae.two gram-negative, motile, aerobic bacterial strains, designated b2(t) and 1_c16_27(t), were isolated from a seawater sample collected from the east china sea and a semi-coke sample from the north-eastern region of estonia, respectively. their genetic, phenotypic and chemotaxonomic properties were studied. the isolates were short rods with polar flagella and were positive for catalase and oxidase activities. q-10 was the predominant respiratory ubiquinone. the major polar lipids were phosphatidy ...201020817840
effect of seed sludge on characteristics and microbial community of aerobic granular sludge.aerobic granular sludge was cultivated by using different kinds of seed sludge in sequencing batch airlift reactor. the influence of seed sludge on physical and chemical properties of granular sludge was studied; the microbial community structure was probed by using scanning electron microscope and polymerase chain reaction-denaturing gradient gel electrophoresis (pcr-dgge). the results showed that seed sludge played an important role on the formation of aerobic granules. seed sludge taken from ...201021174960
devosia psychrophila sp. nov. and devosia glacialis sp. nov., two novel bacteria from alpine glacier cryoconite.two psychrophilic strains, cr7-05t and cr4-44t, isolated from alpine glacier cryoconite, were characterized by using a polyphasic approach. both strains were psychrophilic, showing good growth over a temperature range of 1-20 °c. the chemotaxonomic characteristics of these isolates included the presence of c18:1ω7c and summed feature 3 (c16:1ω7c and/or c16:1ω6c) as the major cellular fatty acids, q-10 as the predominant ubiquinone, diphosphatidylglycerol, phosphatidylglycerol and unknown glycoli ...201121551324
low temperature s(0) biomineralization at a supraglacial spring system in the canadian high arctic.elemental sulfur (s(0) ) is deposited each summer onto surface ice at borup fiord pass on ellesmere island, canada, when high concentrations of aqueous h(2) s are discharged from a supraglacial spring system. 16s rrna gene clone libraries generated from sulfur deposits were dominated by β-proteobacteria, particularly ralstonia sp. sulfur-cycling micro-organisms such as thiomicrospira sp., and ε-proteobacteria such as sulfuricurvales and sulfurovumales spp. were also abundant. concurrent cultivat ...201121592302
thirteen novel deoxynivalenol-degrading bacteria are classified within two genera with distinct degradation mechanisms.the mycotoxin deoxynivalenol (don), a secondary metabolite produced by species of the plant pathogen fusarium, causes serious problems in cereal crop production because of its toxicity towards humans and livestock. a biological approach for the degradation of don using a don-degrading bacterium (ddb) appears to be promising, although information about ddbs is limited. we isolated 13 aerobic ddbs from a variety of environmental samples, including field soils and wheat leaves. of these 13 strains, ...201122098388
biodiversity characterization of cellulolytic bacteria present on native chaco soil by comparison of ribosomal rna genes.sequence analysis of the 16s ribosomal rna gene was used to study bacterial diversity of a pristine forest soil and of two cultures of the same soil enriched with cellulolytic bacteria. our analysis revealed high bacterial diversity in the native soil sample, evidencing at least 10 phyla, in which actinobacteria, proteobacteria and acidobacteria accounted for more than 76% of all sequences. in both enriched samples, members of proteobacteria were the most frequently represented. the majority of ...201122202170
genetic characterization of root-nodule bacteria associated with acacia salicina and a. stenophylla (mimosaceae) across south-eastern australia.symbiotic relationships between legumes and nitrogen-fixing soil micro-organisms are of ecological importance in plant communities worldwide. for example, nutrient-poor australian soils are often dominated by shrubby legumes (e.g. species of acacia). however, relatively few studies have quantified patterns of diversity, host-specificity and effectiveness of these ecologically important plant-microbe interactions. in this study, 16s rrna gene sequence and pcr-rflp analyses were used to examine ba ...201120228207
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