The arbuscular mycorrhizal fungus Rhizophagus irregularis uses a reductive iron assimilation pathway for high-affinity iron uptake.

abstract：:Nitrogen is frequently limiting microbial growth in the environment. As a response, many filamentous cyanobacteria differentiate heterocysts, cells devoted to N2 fixation. Heterocyst differentiation is under the control of the master regulator HetR. Through the characterization of the HetR-dependent transcriptome in N...

journal_title：Environmental microbiology

authors： Brenes-Álvarez M,Mitschke J,Olmedo-Verd E,Georg J,Hess WR,Vioque A,Muro-Pastor AM

更新日期：2019-07-01 00:00:00

abstract：:The annual dynamics of three different ammonia-oxidizing archaea (AOA) ecotypes (amoA gene) and of the SAGMGC-1 (Nitrosotalea-like aquatic Thaumarchaeota) group (16S rRNA gene) were studied by newly designed specific primers and quantitative polymerase chain reaction analysis in a deep oligotrophic high mountain lake ...

journal_title：Environmental microbiology

authors： Restrepo-Ortiz CX,Auguet JC,Casamayor EO

更新日期：2014-03-01 00:00:00

abstract：:A meromictic lake ecosystem (Mahoney Lake, BC, Canada) was investigated to elucidate the significance of chemocline bacteria in the total carbon cycle under natural conditions. In this lake, primary production by oxygenic phototrophs was insufficient to support the observed net secondary production of the calanoid cop...

journal_title：Environmental microbiology

authors： Overmann J,Hall KJ,Northcote TG,Beatty JT

更新日期：1999-06-01 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 effect of inorganic particle concentrations on bacteria-virus-nanoflagellate dynamics in an oligotrophic coastal system was investigated using a model aluminosilicate, kaolinite, with a modal size of 2.1 µm. Virus-only, bacteria-only and bacteria-virus-nanoflagellate incubations were carried out at increasing kaol...

journal_title：Environmental microbiology

authors： Salter I,Böttjer D,Christaki U

更新日期：2011-10-01 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：:The type VI nanomachine is critical for Vibrio cholerae to establish infections and to thrive in niches co-occupied by competing bacteria. The genes for the type VI structural proteins are encoded in one large and two small auxiliary gene clusters. VCA0117 (VasH) - a σ54 -transcriptional activator - is strictly requir...

journal_title：Environmental microbiology

authors： Seibt H,Aung KM,Ishikawa T,Sjöström A,Gullberg M,Atkinson GC,Wai SN,Shingler V

更新日期：2020-10-01 00:00:00

abstract：:The cosmopolitan coccolithophore Emiliania huxleyi is characterized by a strongly differentiated haplodiplontic life cycle consisting of a diploid phase, generally bearing coccoliths (calcified) but that can be also non-calcified, and a non-calcified biflagellated haploid phase. Given most studies have focused on the ...

journal_title：Environmental microbiology

authors： Frada MJ,Bidle KD,Probert I,de Vargas C

更新日期：2012-06-01 00:00:00

abstract：:Lignocellulose degradation is central to the carbon cycle and renewable biotechnologies. The xyloglucan (XyG), β(1→3)/β(1→4) mixed-linkage glucan (MLG) and β(1→3) glucan components of lignocellulose represent significant carbohydrate energy sources for saprophytic microorganisms. The bacterium Cellvibrio japonicus has...

journal_title：Environmental microbiology

authors： Nelson CE,Attia MA,Rogowski A,Morland C,Brumer H,Gardner JG

更新日期：2017-12-01 00:00:00

abstract：:The release of abiotic methane from marine seeps into the atmosphere is a major source of this potent greenhouse gas. Methanotrophic microorganisms in methane seeps use methane as carbon and energy source, thus significantly mitigating global methane emissions. Here, we investigated microbial methane oxidation at the ...

journal_title：Environmental microbiology

authors： Taubert M,Grob C,Crombie A,Howat AM,Burns OJ,Weber M,Lott C,Kaster AK,Vollmers J,Jehmlich N,von Bergen M,Chen Y,Murrell JC

更新日期：2019-10-01 00:00:00

abstract：:Bacillus anthracis, Bacillus cereus and Bacillus thuringiensis have been described as members of the Bacillus cereus group but are, in fact, one species. B. anthracis is a mammal pathogen, B. thuringiensis an entomopathogen and B. cereus a ubiquitous soil bacterium and an occasional human pathogen. In two clinical iso...

journal_title：Environmental microbiology

authors： Mignot T,Denis B,Couture-Tosi E,Kolstø AB,Mock M,Fouet A

更新日期：2001-08-01 00:00:00

abstract：:The microbial communities established in soil samples from an unsaturated, petroleum-contaminated zone and from an adjacent uncontaminated site were characterized by physiological and molecular approaches. Possible electron acceptors such as sulfate and nitrate had been completely depleted in these soil samples. Slurr...

journal_title：Environmental microbiology

authors： Kasai Y,Takahata Y,Hoaki T,Watanabe K

更新日期：2005-06-01 00:00:00

abstract：:pH-responsive transcription factor of the PacC/Rim101 family governs adaptation to environment, development and virulence in many fungal pathogens. In this study, we report the functions of a PacC homologue, MrpacC, in an insect pathogenic fungus Metarhizium robertsii. The gene was highly transcribed in the fungus in ...

journal_title：Environmental microbiology

authors： Huang W,Shang Y,Chen P,Gao Q,Wang C

更新日期：2015-04-01 00:00:00

abstract：:The role of archetypal ribonucleases (RNases) in the physiology and stress endurance of the soil bacterium and metabolic engineering platform Pseudomonas putida KT2440 has been inspected. To this end, variants of this strain lacking each of the most important RNases were constructed. Each mutant lacked either one exor...

journal_title：Environmental microbiology

authors： Apura P,de Lorenzo V,Arraiano CM,Martínez-García E,Viegas SC

更新日期：2021-01-01 00:00:00

abstract：:How to explore protein sequence space efficiently and how to generate high-quality mutant libraries that allow to identify improved variants with current screening technologies are key questions for any directed protein evolution experiment. High-quality mutant libraries can be generated through improved random mutage...

journal_title：Environmental microbiology

authors： Wong TS,Roccatano D,Schwaneberg U

更新日期：2007-11-01 00:00:00

abstract：:Temperature is an important correlate of global patterns of biodiversity, yet the mechanisms driving these relationships are not well understood. Taxa-area relationships (TARs) have been intensively examined, but the effects of temperature on TARs, particularly for microbial communities, are largely undocumented. Here...

journal_title：Environmental microbiology

authors： Deng Y,Ning D,Qin Y,Xue K,Wu L,He Z,Yin H,Liang Y,Buzzard V,Michaletz ST,Zhou J

更新日期：2018-10-01 00:00:00

abstract：:The presence of two insertion sequences, IS406 and IS407, was tested by polymerase chain reaction (PCR) amplification in 25 strains representing 15 Burkholderia species and the close relative Ralstonia pickettii. A total of 50% of the 25 strains contained at least one of the two insertion sequences (ISs) and a statist...

journal_title：Environmental microbiology

authors： Miché L,Faure D,Blot M,Cabanne-Giuli E,Balandreau J

更新日期：2001-12-01 00:00:00

abstract：:Although Escherichia coli is an important model organism for bacterial research, few studies have explored the nature of temporal variation in E. coli strains within the intestinal tracts of host individuals. In this study the E. coli strains of 54 mountain brushtail possums were sampled on four occasions during a yea...

journal_title：Environmental microbiology

authors： Blyton MD,Banks SC,Peakall R,Gordon DM

更新日期：2013-08-01 00:00:00

abstract：:The common polysaccharide antigen (CPA) of the lipopolysaccharide (LPS) from Pseudomonas syringae is highly variable, but the genetic basis for this is poorly understood. We have characterized the CPA locus from P. syringae pv. actinidiae (Psa). This locus has genes for l- and d-rhamnose biosynthesis and an operon cod...

journal_title：Environmental microbiology

authors： Jayaraman J,Jones WT,Harvey D,Hemara LM,McCann HC,Yoon M,Warring SL,Fineran PC,Mesarich CH,Templeton MD

更新日期：2020-12-01 00:00:00

abstract：:The deep sea is a unique and extreme environment characterized by low concentrations of highly recalcitrant carbon. As a consequence, large organic inputs have potential to cause significant perturbation. To assess the impact of organic enrichment on deep sea microbial communities, we investigated bacterial diversity ...

journal_title：Environmental microbiology

authors： Goffredi SK,Orphan VJ

更新日期：2010-02-01 00:00:00

abstract：:Aquatic sediments harbour diverse microbial communities that mediate organic matter degradation and influence biogeochemical cycles. The pool of bioavailable carbon continuously changes as a result of abiotic processes and microbial activity. It remains unclear how microbial communities respond to heterogeneous organi...

journal_title：Environmental microbiology

authors： Mahmoudi N,Beaupré SR,Steen AD,Pearson A

更新日期：2017-07-01 00:00:00

abstract：:Model denitrifiers convert NO3- to N2 , but it appears that a significant fraction of natural populations are truncated, conducting only one or two steps of the pathway. To better understand the diversity of partial denitrifiers in soil and whether discrepancies arise between the presence of known N-oxide reductase ge...

journal_title：Environmental microbiology

authors： Roco CA,Bergaust LL,Bakken LR,Yavitt JB,Shapleigh JP

更新日期：2017-06-01 00:00:00

abstract：:Biomass production for bioenergy may change soil microbes and influence ecosystem properties. To explore the impact of different bioenergy cropping systems on soil microorganisms, the compositions and quantities of soil microbial communities (16S rRNA gene) and N-cycling functional groups (nifH, bacterial amoA, archae...

journal_title：Environmental microbiology

authors： Mao Y,Yannarell AC,Davis SC,Mackie RI

更新日期：2013-03-01 00:00:00

abstract：:Avoparcin, a vancomycin analogue, was banned as a feed additive in Taiwan in 2000. A nationwide surveillance was conducted to study the prevalence of vancomycin-resistant enterococci (VRE) on chicken farms between 2000 and 2003. Among the 1021 E. faecalis and 967 E. faecium isolates studied, resistance to tetracycline...

journal_title：Environmental microbiology

authors： Lauderdale TL,Shiau YR,Wang HY,Lai JF,Huang IW,Chen PC,Chen HY,Lai SS,Liu YF,Ho M

更新日期：2007-03-01 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：:The opportunistic human pathogen Acinetobacter baumannii is one of the leading causes of nosocomial infections. The high prevalence of multidrug-resistant strains, a high adaptability to changing environments and an overall pronounced stress resistance contribute to persistence and spread of the bacteria in hospitals ...

journal_title：Environmental microbiology

authors： Zeidler S,Müller V

更新日期：2020-04-01 00:00:00

abstract：:Contaminated soils are subject to diurnal and seasonal temperature variations during on-site ex-situ bioremediation processes. We assessed how diurnal temperature variations similar to that in summer at the site from which petroleum hydrocarbon-contaminated soil was collected affect the soil microbial community and th...

journal_title：Environmental microbiology

authors： Akbari A,Ghoshal S

更新日期：2015-12-01 00:00:00

abstract：:Stx bacteriophages are involved in the pathogenicity of Stx-producing Escherichia coli. Induction of the Stx phage lytic cycle increases Stx expression and releases Stx phages that reach extracellular environments. Stx phage family comprises different phages that harbour any stx subtype. Stx2 is closely related with s...

journal_title：Environmental microbiology

authors： Grau-Leal F,Quirós P,Martínez-Castillo A,Muniesa M

更新日期：2015-11-01 00:00:00

abstract：:Tropical aquatic legumes of the genus Aeschynomene are unique in that they can be stem-nodulated by photosynthetic bradyrhizobia. Moreover, a recent study demonstrated that two Aeschynomene indica symbionts lack canonical nod genes, thereby raising questions about the distribution of such atypical symbioses among rhiz...

journal_title：Environmental microbiology

authors： Miché L,Moulin L,Chaintreuil C,Contreras-Jimenez JL,Munive-Hernández JA,Del Carmen Villegas-Hernandez M,Crozier F,Béna G

更新日期：2010-08-01 00:00:00

abstract：:The biological role of the widespread mycosporine-like amino acids (MAAs) in cyanobacteria is under debate. Here, we have constructed and characterized two mutants impaired in MAA biosynthesis in the bloom-forming cyanobacterium Microcystis aeruginosa PCC 7806. We could identify shinorine as the sole MAA type of the s...

journal_title：Environmental microbiology

authors： Hu C,Völler G,Süßmuth R,Dittmann E,Kehr JC

更新日期：2015-05-01 00:00:00