Characterization of PfiT/PfiA toxin-antitoxin system of Pseudomonas aeruginosa that affects cell elongation and prophage induction.

abstract：:In response to global warming, increasing quantities of tDOM are transported through estuaries from land to the sea. In this study, we investigated microbial responses to increased tDOM concentrations in three salinity regimes (salinity: 32, 7 and 3) characteristic of the Baltic Sea. Mesocosm experiments performed in ...

journal_title：Environmental microbiology

authors： Herlemann DPR,Manecki M,Dittmar T,Jürgens K

更新日期：2017-08-01 00:00:00

abstract：:Biological membranes have evolved different mechanisms to modify their composition in response to chemical stimuli in a process called 'homeoviscous adaptation'. Among these mechanisms, modifications in the ratio of saturated/unsaturated fatty acids and in cis/trans fatty acid isomers, cyclopropanation and changes in ...

journal_title：Environmental microbiology

authors： Bernal P,Muñoz-Rojas J,Hurtado A,Ramos JL,Segura A

更新日期：2007-05-01 00:00:00

abstract：:In a future scenario of increasing temperatures in North-Atlantic waters, the risk associated with the expansion of the harmful, benthic dinoflagellate Ostreopsis cf. siamensis has to be evaluated and monitored. Microscopy observations and spatio-temporal surveys of environmental DNA (eDNA) were associated with Lagran...

journal_title：Environmental microbiology

authors： Drouet K,Jauzein C,Herviot-Heath D,Hariri S,Laza-Martinez A,Lecadet C,Plus M,Seoane S,Sourisseau M,Lemée R,Siano R

更新日期：2021-01-26 00:00:00

abstract：:Viral production was determined in the sub-Antarctic zone (SAZ) to the southwest and southeast of Tasmania and in the Polar Frontal zone (PFZ) of the Australian sector of the Southern Ocean during Austral summer (January-February 2007). Concentrations of viruses were the lowest (6.6 x 10(9) particles l(-1)) in the PFZ...

journal_title：Environmental microbiology

authors： Evans C,Pearce I,Brussaard CP

更新日期：2009-11-01 00:00:00

abstract：:Iron is the most abundant redox-active metal in the Earth's crust. The one electron transfer between the two most common redox states, Fe(II) and Fe(III), plays a role in a huge range of environmental processes from mineral formation and dissolution to contaminant remediation and global biogeochemical cycling. It has ...

journal_title：Environmental microbiology

authors： Bryce C,Blackwell N,Schmidt C,Otte J,Huang YM,Kleindienst S,Tomaszewski E,Schad M,Warter V,Peng C,Byrne JM,Kappler A

更新日期：2018-10-01 00:00:00

abstract：:The diversity of microbial eukaryotes was surveyed by environmental sequencing from tropical lagoon sites of the South Pacific, collected through the American Museum of Natural History (AMNH)'s Explore21 expedition to the Solomon Islands in September 2013. The sampled lagoons presented low nutrient concentrations typi...

journal_title：Environmental microbiology

authors： Kim E,Sprung B,Duhamel S,Filardi C,Kyoon Shin M

更新日期：2016-12-01 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：:Selection of suitable genotypes from diverse seed banks may help phytoplankton populations to cope with environmental changes. This study examines whether the high genotypic diversity found in the Baltic cyst pool of the toxic dinoflagellate Alexandrium ostenfeldii is coupled to phenotypic variability that could aid s...

journal_title：Environmental microbiology

authors： Kremp A,Oja J,LeTortorec AH,Hakanen P,Tahvanainen P,Tuimala J,Suikkanen S

更新日期：2016-02-01 00:00:00

abstract：:Root endophytic fungi are found in a great variety of plants and ecosystems, but the ecological drivers of their biogeographic distribution are poorly understood. Here, we investigate the occurrence of root endophytes in the non-mycorrhizal plant genus Microthlaspi, and the effect of environmental factors and geograph...

journal_title：Environmental microbiology

authors： Glynou K,Ali T,Buch AK,Haghi Kia S,Ploch S,Xia X,Çelik A,Thines M,Maciá-Vicente JG

更新日期：2016-09-01 00:00:00

abstract：:As filter-feeders, bivalve molluscs accumulate Vibrio into edible tissues. Consequently, an accurate assessment of depuration procedures and the characterization of the persistent Vibrio community in depurated shellfish represent a key issue to guarantee food safety in shellfish products. The present study investigate...

journal_title：Environmental microbiology

authors： Zampieri A,Carraro L,Cardazzo B,Milan M,Babbucci M,Smits M,Boffo L,Fasolato L

更新日期：2020-10-01 00:00:00

abstract：:Toxin-antitoxin modules are gene pairs encoding a toxin and its antitoxin, and are found on the chromosomes of many bacteria, including pathogens. Here, we characterize the specific contribution of the TxpA and YqcG toxins in elimination of defective cells from developing Bacillus subtilis biofilms. On nutrient limita...

journal_title：Environmental microbiology

authors： Bloom-Ackermann Z,Steinberg N,Rosenberg G,Oppenheimer-Shaanan Y,Pollack D,Ely S,Storzi N,Levy A,Kolodkin-Gal I

更新日期：2016-12-01 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：:Studies assessing the effects of anthropogenic inputs on the taxonomic and functional diversity of bacterioplankton communities in lotic ecosystems are limited. Here, we applied 16S rRNA gene amplicon and whole-genome shotgun sequencing to examine the microbial diversity in samples from the Kalamas River (Northwest Gr...

journal_title：Environmental microbiology

authors： Meziti A,Tsementzi D,Ar Kormas K,Karayanni H,Konstantinidis KT

更新日期：2016-12-01 00:00:00

abstract：:Serratia sp. ATCC 39006 produces intracellular gas vesicles to enable upward flotation in water columns. It also uses flagellar rotation to swim through liquid and swarm across semi-solid surfaces. Flotation and motility can be co-regulated with production of a β-lactam antibiotic (carbapenem carboxylate) and a linear...

journal_title：Environmental microbiology

authors： Quintero-Yanes A,Lee CM,Monson R,Salmond G

更新日期：2020-07-01 00:00:00

abstract：:Stable carbon isotope signatures of diagnostic lipid biomarkers have suggested that Roseiflexus spp., the dominant filamentous anoxygenic phototrophic bacteria inhabiting microbial mats of alkaline siliceous hot springs, may be capable of fixing bicarbonate via the 3-hydroxypropionate pathway, which has been character...

journal_title：Environmental microbiology

authors： Klatt CG,Bryant DA,Ward DM

更新日期：2007-08-01 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：:Marinobacter santoriniensis NKSG1(T) is a mesophilic, dissimilatory arsenate-reducing and arsenite-oxidizing bacterium isolated from an arsenate-reducing enrichment culture. The inoculum was obtained from arsenic-rich shallow marine hydrothermal sediment from Santorini, Greece, with evidence of arsenic redox cycling. ...

journal_title：Environmental microbiology

authors： Handley KM,Héry M,Lloyd JR

更新日期：2009-06-01 00:00:00

abstract：:Deep-sea ecosystems, such as cold seeps and hydrothermal vents, have high biomass, even though they are located in the benthic zone, where no sunlight is present to provide energy for organism proliferation. Based on the coexistence of the reduced gases and chemoautotrophic microbes, it is inferred that the energy fro...

journal_title：Environmental microbiology

authors： Sun X,Yang J,Zheng M,Zhang X

更新日期：2020-12-07 00:00:00

abstract：:Exopolysaccharide is a critical biofilm matrix component, yet little is known about how the synthesis of multiple exopolysaccharides is regulated. Pseudomonas aeruginosa can produce several biofilm matrix exopolysaccharides that include alginate, Psl and Pel. Here we demonstrated that AlgC, a key enzyme that provides ...

journal_title：Environmental microbiology

authors： Ma L,Wang J,Wang S,Anderson EM,Lam JS,Parsek MR,Wozniak DJ

更新日期：2012-08-01 00:00:00

abstract：:Nostoc flagelliforme is well known for its strong ecological adaptability in inhabiting desert biological soil crusts. However, the mechanism of its recovery from quiescent to active state after prolonged dormancy remains poorly characterized. Especially how exoproteome be related to the adaptive strategies and partic...

journal_title：Environmental microbiology

authors： Wang B,Yang J,Xu C,Yi L,Wan C

更新日期：2020-04-01 00:00:00

abstract：:Certain filamentous cyanobacteria, including Aphanizomenon ovalisporum, are potentially toxic owing to the formation of the hepatotoxin cylindrospermopsin. We previously identified a gene cluster in A. ovalisporum likely to be involved in cylindrospermopsin biosynthesis, including amidinotransferase (aoaA) and polyket...

journal_title：Environmental microbiology

authors： Shalev-Malul G,Lieman-Hurwitz J,Viner-Mozzini Y,Sukenik A,Gaathon A,Lebendiker M,Kaplan A

更新日期：2008-04-01 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：:Phytoplankton influence the composition of bacterial communities, but the taxonomic specificity of algal-bacterial interactions is unclear due to the aggregation of ecologically distinct bacterial populations by community characterization methods. Here we examine whether phytoplankton seasonal succession affects the c...

journal_title：Environmental microbiology

authors： Paver SF,Youngblut ND,Whitaker RJ,Kent AD

更新日期：2015-03-01 00:00:00

abstract：:Yersinia ruckeri is the causative agent of enteric redmouth in fish and one of the major bacterial pathogens causing losses in salmonid aquaculture. Previously typing methods, including restriction enzyme analysis, pulsed-field gel electrophoresis and multilocus enzyme electrophoresis (MLEE) have indicated a clonal po...

journal_title：Environmental microbiology

authors： Bastardo A,Ravelo C,Romalde JL

更新日期：2012-08-01 00:00:00

abstract：:The well-known role of antibiotics in killing sensitive organisms has been challenged by the effects they exert at subinhibitory concentrations. Unfortunately, there are very few published reports on the advantages these molecules may confer to their producers. This study describes the construction of a genetically ve...

journal_title：Environmental microbiology

authors： Prajapati D,Kumari N,Dave K,Chatupale V,Pohnerkar J

更新日期：2019-02-01 00:00:00

abstract：:Prochlorococcus, an abundant phototroph in the oceans, are infected by members of three families of viruses: myo-, podo- and siphoviruses. Genomes of myo- and podoviruses isolated on Prochlorococcus contain DNA replication machinery and virion structural genes homologous to those from coliphages T4 and T7 respectively...

journal_title：Environmental microbiology

authors： Sullivan MB,Krastins B,Hughes JL,Kelly L,Chase M,Sarracino D,Chisholm SW

更新日期：2009-11-01 00:00:00

abstract：:Butyrate-producing bacteria play an important role in the human colon, supplying energy to the gut epithelium and regulating host cell responses. In order to explore the diversity and culturability of this functional group, we designed degenerate primers to amplify butyryl-CoA:acetate CoA-transferase sequences from fa...

journal_title：Environmental microbiology

authors： Louis P,Young P,Holtrop G,Flint HJ

更新日期：2010-02-01 00:00:00

abstract：:When bacterial lineages make the transition from free-living to permanent association with hosts, they can undergo massive gene losses, for which the selective forces within host tissues are unknown. We identified here melanogenic clinical isolates of Pseudomonas aeruginosa with large chromosomal deletions (66 to 270 ...

journal_title：Environmental microbiology

authors： Hocquet D,Petitjean M,Rohmer L,Valot B,Kulasekara HD,Bedel E,Bertrand X,Plésiat P,Köhler T,Pantel A,Jacobs MA,Hoffman LR,Miller SI

更新日期：2016-10-01 00:00:00

abstract：:Although common knowledge dictates that the lichen thallus is formed solely by a fungus (mycobiont) that develops a symbiotic relationship with an alga and/or cyanobacterium (photobiont), the non-photoautotrophic bacteria found in lichen microbiomes are increasingly regarded as integral components of lichen thalli. Fo...

journal_title：Environmental microbiology

authors： Hodkinson BP,Gottel NR,Schadt CW,Lutzoni F

更新日期：2012-01-01 00:00:00

abstract：:The frequent production of the hepatotoxin microcystin (MC) and its impact on the lifestyle of bloom-forming cyanobacteria are poorly understood. Here, we report that MC interferes with the assembly and the subcellular localization of RubisCO, in Microcystis aeruginosa PCC7806. Immunofluorescence, electron microscopic...

journal_title：Environmental microbiology

authors： Barchewitz T,Guljamow A,Meissner S,Timm S,Henneberg M,Baumann O,Hagemann M,Dittmann E

更新日期：2019-12-01 00:00:00