| reassessment of the taxonomic structure of the diazotrophic genus azoarcus sensu lato and description of three new genera and new species, azovibrio restrictus gen. nov., sp. nov., azospira oryzae gen. nov., sp. nov. and azonexus fungiphilus gen. nov., sp. nov. | the taxonomic structure of members of the genus azoarcus sensu lato was reassessed in a polyphasic approach. two species, azoarcus communis and azoarcus indigens, three unnamed species containing diazotrophs associated with kallar grass roots (groups c, d) and a group of strains (e) isolated from fungi were analysed. they were compared by page analyses of cellular proteins, genomic fingerprints, morphological and nutritional features to new isolates from rice roots. all strains within groups c, ... | 2000 | 10758872 |
| azonexus caeni sp. nov., a denitrifying bacterium isolated from sludge of a wastewater treatment plant. | a polyphasic taxonomic study was carried out to determine the taxonomic position of a newly isolated denitrifying bacterium, designated slu-05t, which had been isolated from sludge from the main aerobic treatment tanks of a municipal sewage treatment plant. phylogenetic analysis based on comparative 16s rrna gene sequencing indicated that strain slu-05t was closely related to azonexus fungiphilus lmg 19178t (96.4 % sequence similarity), the sole species in the genus azonexus. strain slu-05t comp ... | 2006 | 16627652 |
| azonexus hydrophilus sp. nov., a nifh gene-harbouring bacterium isolated from freshwater. | three gram-negative, non-pigmented, rod-shaped, facultatively aerobic bacterial strains, designated d8-1t, d8-2 and imcc1716, were isolated from a freshwater spring sample and a eutrophic freshwater pond. based on characterization using a polyphasic approach, the three strains showed highly similar phenotypic, physiological and genetic characteristics. all of the strains harboured the nitrogenase gene nifh, but nitrogen-fixing activities could not be detected in nitrogen-free culture media. the ... | 2008 | 18398200 |
| description of the novel perchlorate-reducing bacteria dechlorobacter hydrogenophilus gen. nov., sp. nov.and propionivibrio militaris, sp. nov. | novel dissimilatory perchlorate-reducing bacteria (dprb) were isolated from enrichments conducted under conditions different from those of all previously described dprb. strain lt-1(t) was enriched using medium buffered at ph 6.6 with 2-(n-morpholino)ethanesulfonic acid (mes) and had only 95% 16s rrna gene identity with its closest relative, azonexus caeni. strain mp(t) was enriched in the cathodic chamber of a perchlorate-reducing bioelectrical reactor (ber) and together with an additional stra ... | 2010 | 19921177 |
| anaerobic oxidation of arsenite linked to chlorate reduction. | microorganisms play a significant role in the speciation and mobility of arsenic in the environment. in this study, the oxidation of arsenite [as(iii)] to arsenate [as(v)] linked to chlorate (clo₃⁻) reduction was shown to be catalyzed by sludge samples, enrichment cultures (ecs), and pure cultures incubated under anaerobic conditions. no activity was observed in treatments lacking inoculum or with heat-killed sludge, or in controls lacking clo₃⁻. the as(iii) oxidation was linked to the complete ... | 2010 | 20729322 |
| cultivation-independent analysis of archaeal and bacterial communities of the formation water in an indian coal bed to enhance biotransformation of coal into methane. | biogenic origin of the significant proportion of coal bed methane has indicated the role of microbial communities in methanogenesis. by using cultivation-independent approach, we have analysed the archaeal and bacterial community present in the formation water of an indian coal bed at 600-700 m depth to understand their role in methanogenesis. presence of methanogens in the formation water was inferred by epifluorescence microscopy and pcr amplification of mcra gene. archaeal 16s rrna gene clone ... | 2011 | 22202965 |
| interactions between perchlorate and nitrate reductions in the biofilm of a hydrogen-based membrane biofilm reactor. | we studied the microbial functional and structural interactions between nitrate (no(3)(-)) and perchlorate (clo(4)(-)) reductions in the hydrogen (h(2))-based membrane biofilm reactor (mbfr). when h(2) was not limiting, clo(4)(-) and no(3)(-) reductions were complete, and the mbfr's biofilm was composed mainly of bacteria from the ε- and β-proteobacteria classes, with autotrophic genera sulfuricurvum, hydrogenophaga, and dechloromonas dominating the biofilm. based on functional-gene and pyrosequ ... | 2011 | 22017212 |