High temporal variability in commensal Escherichia coli strain communities of a herbivorous marsupial.

abstract：:The ability of the product of a desired reaction to activate a bacterial transcriptional regulator was exploited to develop genetic traps that render the catalytic activity born by a DNA clone into a selectable/scorable phenotype. We established this strategy with a system to expose the activity of dehydrochlorinases ...

journal_title：Environmental microbiology

authors： Mohn WW,Garmendia J,Galvao TC,de Lorenzo V

更新日期：2006-03-01 00:00:00

abstract：:The factors that control the production of microcystins (hepatotoxins) during cyanobacterial blooms, and the function of these metabolites remain largely unknown. In an attempt to provide answers to these questions, we compared the fitness of microcystin (MC)-producing and non-MC-producing Planktothrix agardhii strain...

journal_title：Environmental microbiology

authors： Briand E,Yéprémian C,Humbert JF,Quiblier C

更新日期：2008-12-01 00:00:00

abstract：:In recent years, the importance of the Gram-negative bacterium Stenotrophomonas as an opportunistic pathogen as well as in biotechnology has increased. The aim of the present study was to develop new methods for distinguishing between strains closely related to the potentially human pathogenic Stenotrophomonas maltoph...

journal_title：Environmental microbiology

authors： Ribbeck-Busch K,Roder A,Hasse D,de Boer W,Martínez JL,Hagemann M,Berg G

更新日期：2005-11-01 00:00:00

abstract：:At deep-sea hydrothermal vents, microbial communities thrive across geochemical gradients above, at, and below the seafloor. In this study, we determined the gene content and transcription patterns of microbial communities and specific populations to understand the taxonomy and metabolism both spatially and temporally...

journal_title：Environmental microbiology

authors： Fortunato CS,Larson B,Butterfield DA,Huber JA

更新日期：2018-02-01 00:00:00

abstract：:Homeostatic control of nitric oxide (NO) at nanomolar concentrations appears common among denitrifying bacteria, often ascribed to synchronized expression of nitrite and nitric oxide reductase (Nir and Nor). We questioned whether this is sufficient: using the reported substrate affinities for cytochrome cd1 nitrite re...

journal_title：Environmental microbiology

authors： Hassan J,Bergaust LL,Molstad L,de Vries S,Bakken LR

更新日期：2016-09-01 00:00:00

abstract：:Cell cycle regulation is pivotal for proper cell division and cellular differentiation in eukaryotic cells. The central regulators that govern eukaryotic cell cycle progression are cyclin-dependent kinases (CDKs) and their partners. Here, we report that Magnaporthe oryzae CKS1 encodes a cyclin-dependent kinase subunit...

journal_title：Environmental microbiology

authors： Yue X,Que Y,Deng S,Xu L,Oses-Ruiz M,Talbot NJ,Peng Y,Wang Z

更新日期：2017-10-01 00:00:00

abstract：:Metarhizium robertsii occupies a wide array of ecological niches and has diverse lifestyle options (saprophyte, insect pathogen and plant symbiont), that renders it an unusually effective model for studying genetic mechanisms for fungal adaptation. Here over 20,000 M. robertsii T-DNA mutants were screened in order to ...

journal_title：Environmental microbiology

authors： Zeng G,Chen X,Zhang X,Zhang Q,Xu C,Mi W,Guo N,Zhao H,You Y,Dryburgh FJ,Bidochka MJ,St Leger RJ,Zhang L,Fang W

更新日期：2017-10-01 00:00:00

abstract：:Anaerobic bacteria reductively dechlorinate polychlorinated biphenyls (PCBs) in aquatic sediments, but these microorganisms remain uncultured and, until now, unidentified. Through denaturing gradient gel electrophoresis (DGGE) of 16S rDNA from a highly enriched ortho-PCB dechlorinating culture, the growth of a single ...

journal_title：Environmental microbiology

authors： Cutter LA,Watts JE,Sowers KR,May HD

更新日期：2001-11-01 00:00:00

abstract：:The genome of the soil bacterium Pseudomonas putida strain KT2440 has been erased of various determinants of resistance to antibiotics encoded in its extant chromosome. To this end, we employed a coherent genetic platform that allowed the precise deletion of multiple genomic segments in a large variety of Gram-negativ...

journal_title：Environmental microbiology

authors： Martínez-García E,de Lorenzo V

更新日期：2011-10-01 00:00:00

abstract：:The Cape Floral Kingdom is an area of unique plant biodiversity in South Africa with exceptional concentrations of rare and endemic species and experiencing drastic habitat loss. Here we present the first molecular study of the microbial diversity associated with the rhizosphere soil of endemic plants of the Proteacea...

journal_title：Environmental microbiology

authors： Stafford WH,Baker GC,Brown SA,Burton SG,Cowan DA

更新日期：2005-11-01 00:00:00

abstract：:The genome of the soil bacterium Pseudomonas putida KT2440 encodes singular orthologues of genes crp (encoding the catabolite repression protein, Crp) and cyaA (adenylate cyclase) of Escherichia coli. The levels of cAMP formed by P. putida cells were below detection with a Dictyostelium biosensor in vivo. The cyaA(P. ...

journal_title：Environmental microbiology

authors： Milanesio P,Arce-Rodríguez A,Muñoz A,Calles B,de Lorenzo V

更新日期：2011-02-01 00:00:00

abstract：:To obtain new amidases of biocatalytic relevance, we used microorganisms indigenous to different types of soil and sediment as a source of DNA for the construction of environmental gene banks, following two different strategies. In one case, DNA was isolated from soil without preceding cultivation to preserve a high d...

journal_title：Environmental microbiology

authors： Gabor EM,de Vries EJ,Janssen DB

更新日期：2004-09-01 00:00:00

abstract：:The transcription of S-PM2 phage following infection of Synechococcus sp. WH7803, a marine cyanobacterium, was analysed by quantitative real-time PCR. Unlike the distantly related coliphage T4, there were only two (early and late) instead of three (early, middle and late) classes of transcripts during the developmenta...

journal_title：Environmental microbiology

authors： Clokie MR,Shan J,Bailey S,Jia Y,Krisch HM,West S,Mann NH

更新日期：2006-05-01 00:00:00

abstract：:High-throughput sequencing (HTS) surveys, among the most common approaches currently used in environmental microbiology, require reliable reference databases to be correctly interpreted. The EukRef Initiative (eukref.org) is a community effort to manually screen available small subunit (SSU) rRNA gene sequences and pr...

journal_title：Environmental microbiology

authors： Boscaro V,Santoferrara LF,Zhang Q,Gentekaki E,Syberg-Olsen MJ,Del Campo J,Keeling PJ

更新日期：2018-06-01 00:00:00

abstract：:The influence of microbial degradation on the 13C/12C isotope composition of aromatic hydrocarbons is presented using toluene as a model compound. Four different toluene-degrading bacterial strains grown in batch culture with oxygen, nitrate, ferric iron or sulphate as electron acceptors were studied as representative...

journal_title：Environmental microbiology

authors： Meckenstock RU,Morasch B,Warthmann R,Schink B,Annweiler E,Michaelis W,Richnow HH

更新日期：1999-10-01 00:00:00

abstract：:In an attempt to link the microbial community composition and function in mine tailings to the generation of acid mine drainage, we simultaneously explored the geochemistry and microbiology of six tailings collected from a lead/zinc mine, i.e. primary tailings (T1), slightly acidic tailings (T2), extremely acidic tail...

journal_title：Environmental microbiology

authors： Chen LX,Li JT,Chen YT,Huang LN,Hua ZS,Hu M,Shu WS

更新日期：2013-09-01 00:00:00

abstract：:Growth conditions for heterotrophic bacteria in the environment are characterized by low concentrations of carbon and energy sources and complex substrate mixtures. While mechanisms of starvation-survival in the absence of carbon substrates have been studied in considerable detail, information on the physiology of slo...

journal_title：Environmental microbiology

authors： Ihssen J,Egli T

更新日期：2005-10-01 00:00:00

abstract：:During the anaerobic biodegradation of naphthalene and methylnaphthalene, unique metabolites are formed by specific microbial carboxylation and ring-reduction reactions. Groundwater samples from an anoxic, shallow aquifer contaminated with gasoline were examined for the presence of these metabolites by extraction, der...

journal_title：Environmental microbiology

authors： Phelps CD,Battistelli J,Young LY

更新日期：2002-09-01 00:00:00

abstract：:Vibrios belonging to the Harveyi clade are pathogenic marine bacteria affecting both vertebrates and invertebrates, thereby causing a severe threat to the aquaculture industry. In this study, the expression of haemolysin, metalloprotease, serine protease, the quorum sensing master regulator LuxR and the virulence regu...

journal_title：Environmental microbiology

authors： Ruwandeepika HA,Defoirdt T,Bhowmick PP,Karunasagar I,Karunasagar I,Bossier P

更新日期：2011-02-01 00:00:00

abstract：:The pathogenic fungus Cryptococcus neoformans produces melanin within its cell wall for infection and resistance against external stresses such as exposure to UV, temperature fluctuations and reactive oxygen species. It has been reported that melanin may also protect cells from ionizing radiation damage, against which...

journal_title：Environmental microbiology

authors： Schultzhaus Z,Chen A,Kim S,Shuryak I,Chang M,Wang Z

更新日期：2019-08-01 00:00:00

abstract：:The structure of bacterial communities in first-year spring and summer sea ice differs from that in source seawaters, suggesting selection during ice formation in autumn or taxon-specific mortality in the ice during winter. We tested these hypotheses by weekly sampling (January-March 2004) of first-year winter sea ice...

journal_title：Environmental microbiology

authors： Collins RE,Rocap G,Deming JW

更新日期：2010-07-01 00:00:00

abstract：:Bacteria are sometimes neither starving nor under nutrient-excess conditions. When growing with suboptimal levels of nutrients, hungry bacteria express appropriate cellular responses. This review discusses approaches to defining the hunger response in both molecular and growth kinetic terms. The gene expression change...

journal_title：Environmental microbiology

authors： Ferenci T

更新日期：2001-10-01 00:00:00

abstract：:The marine bacterium Vibrio fischeri is the monospecific symbiont of the Hawaiian bobtail squid, Euprymna scolopes, and the establishment of this association involves a number of signaling pathways and transcriptional responses between both partners. We report here the first full RNA-Seq dataset representing host-asso...

journal_title：Environmental microbiology

authors： Thompson LR,Nikolakakis K,Pan S,Reed J,Knight R,Ruby EG

更新日期：2017-05-01 00:00:00

abstract：:In hostile environments diversity within a bacterial population may be beneficial for the fitness of the microbial community as a whole. Here we analysed the population diversity of Staphylococcus aureus in infecting and colonizing situations. In the study, performed independently in two German centres, the heterogene...

journal_title：Environmental microbiology

authors： Goerke C,Gressinger M,Endler K,Breitkopf C,Wardecki K,Stern M,Wolz C,Kahl BC

更新日期：2007-12-01 00:00:00

abstract：:Besides 19 potential reductive dehalogenase genes, the genome of Dehalococcoides ethenogenes strain 195 contains over 60 genes annotated as encoding oxidoreductases, including five hydrogenase complexes and a formate dehydrogenase (Fdh). Using quantitative reverse transcriptase polymerase chain reaction, we found that...

journal_title：Environmental microbiology

authors： Morris RM,Sowell S,Barofsky D,Zinder S,Richardson R

更新日期：2006-09-01 00:00:00

abstract：:Symbiotic association is universal in nature, and an array of symbionts play a crucial part in host life history. Aphids and their diverse symbionts have become a good model system to study insect-symbiont interactions. Previous symbiotic diversity surveys have mainly focused on a few aphid clades, and the relative im...

journal_title：Environmental microbiology

authors： Qin M,Chen J,Xu S,Jiang L,Qiao G

更新日期：2021-01-07 00:00:00

abstract：:Marine picocyanobacteria of the genera Prochlorococcus and Synechococcus are major contributors to oceanic primary production. The genera are genetically diverse, comprising several known ecotypes or lineages. However, little is known of the distribution of these lineages over large geographic areas. Here, we analysed...

journal_title：Environmental microbiology

authors： Zwirglmaier K,Heywood JL,Chamberlain K,Woodward EM,Zubkov MV,Scanlan DJ

更新日期：2007-05-01 00:00:00

abstract：:Cyanobacteria, phototrophic organisms performing oxygenic photosynthesis, must adapt their metabolic processes to the challenges imposed by the succession of days and nights. Two conserved cyanobacterial proteins, PII and PipX, function as hubs of the nitrogen interaction network, forming complexes with a variety of d...

journal_title：Environmental microbiology

authors： Espinosa J,Labella JI,Cantos R,Contreras A

更新日期：2018-03-01 00:00:00

abstract：:The bacterial degradation of polysaccharides is central to marine carbon cycling, but little is known about the bacterial taxa that degrade specific marine polysaccharides. Here, bacterial growth and community dynamics were studied during the degradation of the polysaccharides chitin, alginate and agarose in microcosm...

journal_title：Environmental microbiology

authors： Wietz M,Wemheuer B,Simon H,Giebel HA,Seibt MA,Daniel R,Brinkhoff T,Simon M

更新日期：2015-10-01 00:00:00

abstract：:Endophytic microorganisms asymptomatically colonise plant tissues. Exploring the assembly dynamics of bacterial endophytic communities is essential to understand the functioning of the plant holobiont and to optimise their possible use as biopesticides or plant biostimulants. The variation in endophytic communities in...

journal_title：Environmental microbiology

authors： Campisano A,Albanese D,Yousaf S,Pancher M,Donati C,Pertot I

更新日期：2017-08-01 00:00:00