Showing papers in "FEMS Microbiology Ecology in 1996"

TL;DR: Sulfide inhibition of NO- and N 2 O- reductases is proposed as being responsible for the driving part of the electron flow from S 2− to NH 4 + .

TL;DR: Experiments with the native crust microbial population demonstrated the possibility of net primary productivity at both high relative air humidities and low moisture content.

TL;DR: Alkaliphilic Archaea were relatively closely related to members of the genera Natronococcus and Natronobacterium, and an anaerobic, thermophilic isolate has been assigned to a new genus within the Thermotogales.

TL;DR: Results suggest that concentrate diets that lower ruminal pH may provide a practical means of decreasing ruminal methane production.

TL;DR: The 16S rRNA genes from 20 selected isolates were closely related to the sulphate reducers Desulfomicrobium baculatum or Desulfovibrio sp.

TL;DR: In this article, the in situ temperature of the profundal sediment of Lake Constance is constant at 4°C and at a higher temperature of 20°C, homoacetogenic bacteria were detected on H2CO2.

TL;DR: The successful isolation of thermophilic, fermentative microorganisms from petroleum reservoirs decreased significantly with increasing salinity and temperature, which support the existence of a deep biosphere where fermentativemicroorganisms are widespread.

TL;DR: The cycling of Fe in the lower portion of the tailings was mainly driven by the precipitation of melanterite (FeSO4.7H2O) following the oxidation of pyrite and the release of large amounts of dissolved Fe and SO42−.

TL;DR: The most powerful lignin-degraders among the 82 microbial strains isolated during a screening of ligninolytic microorganisms from forest soil were identified as Penicillium chrysogenum, Fusarium oxysporum and Fusaria solani, which were able to attack the hemicellulosic, cellulosic and also lign in fractions of wheat straw during solid-state fermentation.

TL;DR: This study suggests epiphytic N 2 -fixing bacteria form a diazotrophic consortium with these Microcoleus spp.

TL;DR: The distribution of sulfate-reducing bacteria (SRB) in anaerobic sediments was determined using oligonucleotide probes complementary to the 16S ribosomal RNAs of major phylogenetic groups to indicate that SRB populations in sediments are stratified by depth.

TL;DR: Two clones, MHP14 and MHP17, hybridised strongly with the Methylosinus probe and upon complete sequencing and phylogenetic analysis were shown to group closely to the M methylosinus/Methylocystis genera of methanotrophs, and may represent a novel group of acidophilic methano-oxidising bacteria which have yet to be cultured.

TL;DR: Results indicate that nitrite reduction to ammonium allows NAD regeneration and ATP synthesis through acetate formation, instead of ethanol formation which was favoured in the absence of nitrate.

TL;DR: Measurements of aerobic CH 4 oxidation may be biased if acetoclastic methanogenesis plays a significant role, and if CH 4 production and oxidation zones are closely coupled.

TL;DR: Sediment from a microbial mat from the South-West coast of the Netherlands consumed dimethylsulfide under oxic and anoxic conditions produced a Gram-negative, oval DMS oxidizing bacterium, strain RB-1, which was isolated and revealed the presence of the ribulose monophosphate pathway for carbon assimilation and the ability to use the linear dissimilatory pathway via formate to carbon dioxide.

TL;DR: The results suggest that aerobic methane oxidation was a major regulator of seasonal methane emission from the investigated wetland and changes from oxic to anoxic conditions in situ had relatively little effect on survival of the methanotrophic bacteria and thus on methane oxidation potential per se.

TL;DR: The heterotrophic bacterial community was completely unaffected by an active metabolism conducting elemental sulfur disproportionation, and rates of sulfate reduction were identical in the elemental sulfur amended sediment, and in control sediment with no added sulfur.

TL;DR: Results suggest the independent evolution of these two genes in the construction of the 2,4-D metabolic pathway as well as the tfdA and tfdB primer sets could be used for the detection of similar sequences in bacteria and soils.

TL;DR: Results indicate that broad host range plasmids encoding short and rigid pili might spread in soil environments by conjugative transfer, and significantly higher numbers of indigenous transconjugants were obtained for the IncP-plasmid under antibiotic selection pressure, and a greater diversity of transcon jugants was detected.

TL;DR: The bacterial community response to pH was studied for 16 soils with pH(H2O) ranging between 4 and 8 by measuring thymidine incorporation into bacteria extracted from the soil into a solution using homogenization-centrifugation.

TL;DR: The combination of chromatographic separation using reverse-phase high-performance liquid chromatography and continuous monitoring of the column eluate using a diode-array spectrophotometer allowed qualitative and quantitative pigment profiling of extracts of photosynthesis material in a single run.

TL;DR: Bacterial activity was studied in a growth system containing Pinus contorta seedlings inoculated with different mycorrhizal fungi and numbers of viable bacteria appeared to be reduced by T. terrestris, L. proxima, S. variegatus and H. crustuliniforme, while no effect was seen in the other experiments.

TL;DR: Between October and January, the bacteria isolated from root interior tissues acquired a distinct change in taxonomic pattern, with decreased diversity and increased hierarchy, which extended from the rhizosphere to interior root tissues.

TL;DR: The trends of populations during soil incubation indicated that, in the long term, the effect of burning will probably be nil on ammonifiers, somewhat negative on cellulolytic and amylolytic microbes and slightly positive on nitrite- and nitrate-formers.

TL;DR: Factor analysis showed the associations of the most frequent species of ciliates with the operational parameters of the plants, suggesting the indicator value of some of the species: Vorticella striata was related with poor quality of effluent; Aspidisca cicada with stable plant conditions, and Litonotus lamella with a deficiently settling sludge.

TL;DR: The data indicated that these bacteria are extremely difficult to dislodge from particles compared to the majority of bacteria in soil, which suggests the strong attachment to long residence time (i.e. slow turnover) of the methane-oxidizing bacteria.

TL;DR: The Barbados trench is characterized by large fields of volcanoes and mounds located over a distance of 30 km above the northern slope of a basement ridge corresponding to an inactive transform fault and revealed the presence of sulfur-oxidizing bacteria common to many deep-sea sites but also a large contribution of type I and type II methanotrophs to the eubacterial biomass.

TL;DR: Results from frequent sampling of open ecosystems and of water incubated in bottles in situ showed that production and release of viruses wre not induced or stimulated by nutrient addition, high light intensities or transient increase in temperatures ca.

TL;DR: None of the plasmids conferred resistance to a range of antibiotics, other heavy metals, or to UV, and following transfer to recipient bacteria the range of carbon source utilisation was not altered, and this is the first report of the persistence of Pseudomonas spp.

TL;DR: The results indicate that the fine, foraging hyphae are better suited for nutrient uptake than mycelial strands and that phosphorus translocation in the hyphAE occurs by active translocation of small amounts rather than by mass flow.