Abstract:
:Heterocyst-forming cyanobacteria are filamentous organisms that perform oxygenic photosynthesis and CO2 fixation in vegetative cells and nitrogen fixation in heterocysts, which are formed under deprivation of combined nitrogen. These organisms can acclimate to use different sources of nitrogen and respond to different levels of CO2 . Following work mainly done with the best studied heterocyst-forming cyanobacterium, Anabaena, here we summarize the mechanisms of assimilation of ammonium, nitrate, urea and N2 , the latter involving heterocyst differentiation, and describe aspects of CO2 assimilation that involves a carbon concentration mechanism. These processes are subjected to regulation establishing a hierarchy in the assimilation of nitrogen sources -with preference for the most reduced nitrogen forms- and a dependence on sufficient carbon. This regulation largely takes place at the level of gene expression and is exerted by a variety of transcription factors, including global and pathway-specific transcriptional regulators. NtcA is a CRP-family protein that adjusts global gene expression in response to the C-to-N balance in the cells, and PacR is a LysR-family transcriptional regulator (LTTR) that extensively acclimates the cells to oxygenic phototrophy. A cyanobacterial-specific transcription factor, HetR, is involved in heterocyst differentiation, and other LTTR factors are specifically involved in nitrate and CO2 assimilation.
journal_name
Environ Microbioljournal_title
Environmental microbiologyauthors
Herrero A,Flores Edoi
10.1111/1462-2920.14370subject
Has Abstractpub_date
2019-01-01 00:00:00pages
1-17issue
1eissn
1462-2912issn
1462-2920journal_volume
21pub_type
杂志文章,评审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
pub_type: 杂志文章
doi:10.1046/j.1462-2920.1999.00050.x
更新日期:1999-10-01 00:00:00
abstract::The surface and surroundings of microalgal cells (phycosphere) are critical interaction zones but have been difficult to functionally interrogate due to methodological limitations. We examined effects of phycosphere-associated bacteria for two biofuel-relevant microalgal species (Phaeodactylum tricornutum and Nannochl...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14357
更新日期:2018-12-01 00:00:00
abstract::The Pmk1 and Mps1 MAP kinases are essential for appressorium formation and plant infection in Magnaporthe oryzae. However, their exact roles during invasive growth are not clear because pmk1 and mps1 mutants are defective in penetration. To further characterize their functions after penetration, in this study we expre...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13884
更新日期:2017-10-01 00:00:00
abstract::Campylobacter lari is a rare human pathogen most commonly associated with birds and shellfish. Little information has been published regarding its prevalence in other environments, or on its potential role as a reservoir of antibiotic resistance. In this study, we characterized 109 C. lari isolated from a range of hos...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2007.01295.x
更新日期:2007-07-01 00:00:00
abstract::Aerobic Anoxygenic Phototrophic Bacteria (AAnPB) are ecologically important microorganisms, widespread in oceanic photic zones. However, the key environmental drivers underpinning AAnPB abundance and diversity are still largely undefined. The temporal patterns in AAnPB dynamics at three oceanographic reference station...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13436
更新日期:2016-12-01 00:00:00
abstract::This study compared bacterial biofilm and planktonic cell susceptibility to metal toxicity by evaluating the minimum inhibitory concentration (MIC), the planktonic minimum bactericidal concentration (MBC), and minimum biofilm eradication concentration (MBEC) using the MBEC device. In total, 17 metal cations and oxyani...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2004.00656.x
更新日期:2004-12-01 00:00:00
abstract::Filamentous sulphide-oxidizing Beggiatoa spp. often occur in large numbers in the coastal seabed without forming visible mats on the sediment surface. We studied the diversity, population structure and the nitrate-storing capability of such bacteria in the Danish Limfjorden and the German Wadden Sea. Their distributio...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1462-2920.2003.00440.x
更新日期:2003-06-01 00:00:00
abstract::A study was conducted in a Castanea sativa forest that produces large quantities of the edible mushroom porcini (Boletus edulis sensu lato). The primary aim was to study porcini mycelia in the soil, and to determine if there were any possible ecological and functional interactions with other dominant soil fungi. Three...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2006.01208.x
更新日期:2007-04-01 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
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2007.01423.x
更新日期:2007-12-01 00:00:00
abstract::Filamentous cyanobacteria are the main founders and primary producers in biological desert soil crusts (BSCs) and are likely equipped to cope with one of the harshest environmental conditions on earth including daily hydration/dehydration cycles, high irradiance and extreme temperatures. Here, we resolved and report o...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13486
更新日期:2017-02-01 00:00:00
abstract::Two phylogenetically distinct marine strains producing transparent exopolymers (TEP), designated HTCC2155(T) and HTCC2160, were cultivated from Oregon coast seawater by dilution to extinction in a high throughput culturing format. When cultured in low-nutrient seawater media, these strains copiously produced Alcian Bl...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2004.00614.x
更新日期:2004-06-01 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
pub_type: 杂志文章
doi:10.1111/1462-2920.15347
更新日期:2020-12-07 00:00:00
abstract::In August 2008, Kasatochi volcano erupted and buried a small island in pyroclastic deposits and fine ash; since then, microbes, plants and birds have begun to re-colonize the initially sterile surface. Five years post-eruption, bacterial 16S rRNA gene and fungal internal transcribed spacer (ITS) copy numbers and extra...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.12924
更新日期:2016-01-01 00:00:00
abstract::The complex ecology of free-living amoebae (FLA) and their role in spreading pathogenic microorganisms through water systems have recently raised considerable interest. In this study, we investigated the presence of FLA and amoebae-resisting bacteria (ARB) at various stages of a drinking water plant fed with river wat...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2008.01693.x
更新日期:2008-10-01 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
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2009.01890.x
更新日期:2009-06-01 00:00:00
abstract::Alcanivorax is an alkane-degrading marine bacterium which propagates and becomes predominant in crude-oil-containing seawater when nitrogen and phosphorus nutrients are supplemented. In order to understand why Alcanivorax overcomes other bacteria under such cultural conditions, competition experiments between Alcanivo...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1468-2920.2003.00468.x
更新日期:2003-09-01 00:00:00
abstract::The persistence of S. Enteritidis PT4 was studied on a free-range breeding chicken farm which had been depopulated following identification of the organism in breeding birds. The site was sampled periodically for 26 months after depopulation and the organism was found to persist in litter, dried faeces and feed, but n...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1462-2920.2003.00387.x
更新日期:2003-02-01 00:00:00
abstract::Ikaite tufa columns from the Ikka Fjord in south-western Greenland constitute a natural, stable environment at low temperature and with a pH ranging from neutral at the exterior to very alkaline (pH 10.4) at the interior of the column. Phylogenetic analysis of culturable organisms revealed ten different isolates repre...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1462-2920.2002.00327.x
更新日期:2002-08-01 00:00:00
abstract::The number of icebergs produced from ice-shelf disintegration has increased over the past decade in Antarctica. These drifting icebergs mix the water column, influence stratification and nutrient condition, and can affect local productivity and food web composition. Data on whether icebergs affect bacterioplankton fun...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13769
更新日期:2017-06-01 00:00:00
abstract::The d- and l-forms of lactate are important fermentation metabolites produced by intestinal bacteria but are found to negatively affect mucosal barrier function and human health. Both enantiomers of lactate can be converted with acetate into the presumed beneficial butyrate by a phylogenetically related group of anaer...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.15269
更新日期:2020-11-01 00:00:00
abstract::The microbial consumption of nitrous oxide (N2O) has gained great interest since it was revealed that this process could mitigate the greenhouse effect of N2O. The consumption of N2O results from its reduction to dinitrogen gas (N2) as part of the denitrification process. However, there is ongoing debate regarding an ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.12404
更新日期:2014-10-01 00:00:00
abstract::The interactions of Vibrio aestuarianus 01/032 with haemolymph of the bivalves Mytilus galloprovincialis and Crassostrea gigas were investigated to understand if haemolymph components (haemocytes and soluble factors) could be involved in the higher resistance to microbial infection shown by mussels in comparison with ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.12750
更新日期:2015-11-01 00:00:00
abstract::Proton-pumping rhodopsins provide an alternative pathway to photosynthesis by which solar energy can enter the marine food web. Rhodopsin genes are widely found in marine bacteria, also in the Arctic, and were recently reported from several eukaryotic lineages. So far, little is known about rhodopsin expression in Arc...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14035
更新日期:2018-02-01 00:00:00
abstract::Microorganisms that thrive in acidic environments are endowed with specialized molecular mechanisms to survive under this extremely harsh condition. In this work, we performed functional screening of six metagenomic libraries from planktonic and rhizosphere microbial communities of the Tinto River, an extremely acidic...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.12021
更新日期:2013-04-01 00:00:00
abstract::A recent analysis revealed that most environmental microbiologists neglect replication in their science (Prosser, 2010). Of all peer-reviewed papers published during 2009 in the field's leading journals, slightly more than 70% lacked replication when it came to analyzing microbial community data. The paucity of replic...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2011.02445.x
更新日期:2011-06-01 00:00:00
abstract::Vibrio cholerae's capacity to cause outbreaks of cholera is linked to its survival and adaptability to changes in aquatic environments. One of the environmental conditions that can vary in V. cholerae's natural aquatic habitats is calcium (Ca(+2)). In this study, we investigated the response of V. cholerae to changes ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2009.01923.x
更新日期:2009-08-01 00:00:00
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
pub_type: 杂志文章
doi:10.1111/1462-2920.13784
更新日期:2017-08-01 00:00:00
abstract::In aquatic ecosystems, microplastics are a relatively new anthropogenic substrate that can readily be colonized by biofilm-forming organisms. To examine the effects of substrate type on microbial community assembly, we exposed ambient Baltic bacterioplankton to plastic substrates commonly found in marine environments ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14120
更新日期:2018-08-01 00:00:00
abstract::It is well recognized that a dynamic biofilm develops upon plant biomass in the herbivore gastrointestinal tract, but this component of the microbiome has not previously been specifically sampled, or directly compared with the biodiversity present in the planktonic fraction of digesta. In this study, the digesta colle...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2005.00721.x
更新日期:2005-04-01 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
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2007.01246.x
更新日期:2007-05-01 00:00:00