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Cyanobacteria (12):
Recent article
Cyanobacteria
Proteomics (11)3 2011
Abstract
We present the first quantitative proteomic analysis of Trichodesmium erythraeum IMS101 when grown under different nitrogen regimes using 2-DE/MALDI-TOF-MS. Addition of combined nitrogen (NO3-) prevented development of the morphological characteristics of the N(2)-fixing cell type (diazocytes), inhi...
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PMID: 21268270
PDF is available here.
PDF is available here.
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Abstract
We have utilized sensitive proteomic approaches to examine the impact of diurnal rhythms on the protein complement in Cyanothece 51142. We found that 250 proteins accounting for ∼5% of the predicted ORFs from the Cyanothece 51142 genome and 20% of proteins detected under alternating light/dark con...
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PMID: 21364985
PDF is available here.
PDF is available here.
Abstract
This chapter contains the description of several methods used for the isolation of functional photosystem II (PS II) core particles from wild type, photosystem I-less, and CP47 histidine-tagged cells of the cyanobacterium Synechocystis sp. PCC 6803. The presented protocols cover cultivation of photo...
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PMID: 20960119
PDF is available here.
PDF is available here.
Abstract
The cytochrome b6f complex from the filamentous cyanobacteria (Mastigocladus laminosus, Nostoc sp. PCC 7120) and spinach chloroplasts has been purified as a homo-dimer. Electrospray ionization mass spectroscopy showed the monomer to contain eight and nine subunits, respectively, and dimeric masses o...
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PMID: 20960122
PDF is available here.
PDF is available here.
Abstract
Plastocyanin and cytochrome c6 are widely distributed over the oxygen-evolving photosynthetic organisms. The two proteins are functionally equivalent, but strongly differ in their global electrostatic charge. In fact, they are acidic in eukaryotes, but either neutral or basic in cyanobacteria. Such...
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PMID: 20960123
PDF is available here.
PDF is available here.
Abstract
This chapter describes the purification and crystallization of oxygen-evolving photosystem II core dimer complex from a thermophilic cyanobacterium Thermosynechococcus vulcanus. Procedures used for purification of photosystem II from the cyanobacterium involves cultivation of cells, isolation of thy...
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PMID: 20960120
PDF is available here.
PDF is available here.
Abstract
We report a metagenomic analysis of a healthy human plaque sample using a combination of second-generation sequencing platforms. A total of 860 million base pairs of non-human sequences were generated. Various analysis tools revealed the presence of 12 well-characterized phyla, members of the TM-7 a...
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PMID: 21040513
PDF is available here.
PDF is available here.
Abstract
We review recent efforts that investigate and quantify the coupling between the circadian and cell cycle clocks in cyanobacteria as a model system. We discuss studies that quantify the coupling from a systems point of view in which the oscillators are described in abstract terms. We also emphasize r...
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PMID: 20947336
PDF is available here.
PDF is available here.
Scientific American (303)5 2010
Abstract
Abstract
Cyanobacterial biomass, chlorophyll-a, and microcystin-LR levels were monitored in drinking and recreational water in Seoul, South Korea and three satellite cities from Oct 2006 to Aug 2007. Total microcystin-LR was the sum of particulate and dissolved microcystin. Except during cold periods, toxic...
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PMID: 20938641
PDF is available here.
PDF is available here.
Abstract
Our previous in situ study showed that bryophyte-microorganism complexes were affected by particulate atmospheric pollution. Here, the effect of urban particulate wet deposits on microbial communities living in bryophytes was studied under controlled conditions. An urban particulate solution was pre...
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PMID: 20674976
PDF is available here.
PDF is available here.
New Phytologist (188)2 2010
Abstract
• Investigating the differential capacity of the response of phytoplankton to human-induced environmental forcing has become a key issue to understanding further the future repercussions on the functioning of aquatic ecosystems. • The initial tolerance to the widely dispersed herbicide simazine...
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PMID: 20630023
PDF is available here.
PDF is available here.
ISME Journal (4)9 2010
Abstract
We show that in cyanophage S-PM2, this intron is spliced during the entire infection cycle. Furthermore, we report the widespread occurrence of psbA introns in marine metagenomic libraries, and with psbA often adjacent to a homing endonuclease (HE). Bioinformatic analysis of the intergenic region be...
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PMID: 20410936
PDF is available here.
PDF is available here.
Abstract
We applied two different approaches to investigate the impact of diazotrophy on nitrogen stable isotope signatures in nitrate and particulate organic nitrogen (PON) of the food-web constituents. The first approach, used during the Poseidon cruise 348 in the Mauritanian upwelling, investigated the lo...
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PMID: 20706897
PDF is available here.
PDF is available here.
Abstract
The filamentous cyanobacterium Arthrospira platensis strain MMG-9 was isolated from a rice field. The ability of this strain to synthesize the bioactive compound indole-3-acetic acid (IAA) was demonstrated. IAA was extracted from the culture A. platensis strain MMG-9 and its identity was confirmed b...
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PMID: 20890089
PDF is available here.
PDF is available here.
Abstract
Two related peptide metabolites, one a cyclic depsipeptide, hoiamide B (2), and the other a linear lipopeptide, hoiamide C (3), were isolated from two different collections of marine cyanobacteria obtained in Papua New Guinea. Their structures were elucidated by combining various techniques in spect...
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PMID: 20687534
PDF is available here.
PDF is available here.
Biofouling (26)6 2010
Abstract
Filamentous benthic marine cyanobacteria are a prolific source of structurally unique bioactive secondary metabolites. A total of 12 secondary metabolites, belonging to the mixed polyketide-polypeptide structural class, were isolated from the marine cyanobacterium, Lyngbya majuscula, and were tested...
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PMID: 20658384
PDF is available here.
PDF is available here.
Abstract
I and probably other complexes. The ndh genes are absent in all sequenced plastid DNAs of algae except for the Charophyceae and some Prasinophyceae. With the possible exclusion of some Conifers and Gnetales, the plastid DNA of all photosynthetic land plants contains the ndh genes, whereas they are a...
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PMID: 20493721
PDF is available here.
PDF is available here.
Abstract
We describe the discovery of an alkane biosynthesis pathway from cyanobacteria. The pathway consists of an acyl-acyl carrier protein reductase and an aldehyde decarbonylase, which together convert intermediates of fatty acid metabolism to alkanes and alkenes. The aldehyde decarbonylase is related to...
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PMID: 20671186
PDF is available here.
PDF is available here.
Abstract
Toxic cyanobacterial blooms, as well as their increasing global occurrence, pose a serious threat to public health, domestic animals, and livestock. In Missisquoi Bay, Lake Champlain, public health advisories have been issued from 2001 to 2009, and local microcystin concentrations found in the lake...
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PMID: 20562282
PDF is available here.
PDF is available here.
Abstract
Overall measurement of methanogenic activity of sludge and or slurry is thought as a key for understanding the basic physiology of anaerobic consortia involved in anaerobic digestion process of an alternative biomass. In this study, the methanogenic activity of biogas plant slurry was used to evalua...
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PMID: 19911119
PDF is available here.
PDF is available here.
Abstract
We have evaluated in vitro cytotoxicity of cyanobacterial phycoerythrin (C-PE) on three human cell lines by cell proliferation and neutral red uptake assays. No toxic effects of C-PE were observed to any of the cell lines tested. The protective role of purified C-PE to potassium permanganate-mediate...
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PMID: 20564513
PDF is available here.
PDF is available here.
Abstract
We present three crystal structures of NtcA from the cyanobacterium Anabaena: the apoform, and two ligand-bound forms in complex with either 2-OG or its analogue 2,2-difluoropentanedioic acid. All structures assemble as homodimers, with each subunit composed of an N-terminal effector-binding domain...
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PMID: 20616047
PDF is available here.
PDF is available here.
Biofouling (26)5 2010
Abstract
Previous studies have provided evidence that color measurements enable on site quantification of superficial biofilms, thereby avoiding the need for sampling. In the present study, the efficiency of color measurements to evaluate to what extent pigment production is affected by environmental paramet...
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PMID: 20425659
PDF is available here.
PDF is available here.
Abstract
This study explored the chronic and harmful effects of different doses of the triazole fungicide, tebuconazole, on the growth, and metabolic and enzymatic variations in the filamentous paddy field cyanobacterium, Westiellopsis prolifica Janet. The growth of the cyanobacterium was determined by an es...
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PMID: 20668408
PDF is available here.
PDF is available here.
Abstract
Cyanobacterial toxins (i.e. microcystins) produced within the microbial mat of coral black band disease (BBD) have been implicated in disease pathogenicity. This study investigated the presence of toxins within BBD lesions and other cyanobacterial patch (CP) lesions, which, in some instances ( appro...
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PMID: 20455937
PDF is available here.
PDF is available here.
Abstract
Mat-forming benthic cyanobacteria are widespread throughout New Zealand rivers, and their ingestion has been linked to animal poisonings. In this study, potentially toxic benthic cyanobacterial proliferations were collected from 21 rivers and lakes throughout New Zealand. Each environmental sample w...
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PMID: 20455945
PDF is available here.
PDF is available here.
Abstract
We have now identified a protein that mediates the recovery of the full antenna capacity when irradiance decreases. In Synechocystis PCC 6803, this protein, which we called the fluorescence recovery protein (FRP), is encoded by the slr1964 gene. Homologues of this gene are present in all of the OCP-...
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PMID: 20534537
PDF is available here.
PDF is available here.
Abstract
We observed that maximal allelopathic activity is highest in early growth stages of the cyanobacterium, and this provided sufficient material for isolation and chemical characterization of active compounds that inhibited the growth of C. vulgaris. Using a bioassay-guided approach, we isolated and st...
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PMID: 20534563
PDF is available here.
PDF is available here.
Biochemistry (Washington) (49)23 2010
Abstract
We show the possibility of isolating from this cyanobacterium the intact monomeric PS1 complex which preserves all subunits and the photochemical activity of the isolated trimeric complex. Moreover, the equilibrium between these complexes in the thylakoid membrane can be shifted by a high-salt treat...
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PMID: 20359245
PDF is available here.
PDF is available here.
Abstract
We describe a new cyanobacterium possessing a high amount of chlorophyll d, which was isolated from waters around Heron Island, Great Barrier Reef (23° 26' 31.2″ S, 151° 54' 50.4″ E). The 16S ribosomal RNA is 2% divergent from the two previously described isolates of A. marina, which were isol...
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PMID: 20505751
PDF is available here.
PDF is available here.
Chemosphere (80)1 2010
Abstract
We determined the toxicity of sulphamethoxazole, trimethoprim, flumequine, tylosin, streptomycin, and oxytetracycline, using the NAT adapted for water exposure. The sensitivity of the NAT was compared to that of bioassays with bacteria (Microtox), cyanobacteria and green algae. In the Microtox test...
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PMID: 20430416
PDF is available here.
PDF is available here.
Abstract
We seek a quantitative relationship between the geometry of conical stromatolites and the biophysical processes that control their growth. We note that all modern conical stromatolites and many that formed in the last 2.8 billion years display a characteristic centimeter-scale spacing between neighb...
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PMID: 20479268
PDF is available here.
PDF is available here.
Abstract
We report the results of a comparative genomic analysis of the integrin adhesion machinery, using genomic data from several unicellular relatives of Metazoa and Fungi. Unexpectedly, we found that core components of the integrin adhesion complex are encoded in the genome of the apusozoan protist Amas...
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PMID: 20479219
PDF is available here.
PDF is available here.
Abstract
Abstract
We hypothesized that BMAA might occur and bioaccumulate in other ecosystems. Here we demonstrate, based on a recently developed extraction and HPLC-MS/MS method and long-term monitoring of BMAA in cyanobacterial populations of a temperate aquatic ecosystem (Baltic Sea, 2007-2008), that BMAA is biosy...
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PMID: 20439734
PDF is available here.
PDF is available here.
Abstract
Abstract
We tested the effects of altered biodiversity (species richness) of deposit-feeding macrofauna on incorporation and burial of phytodetritus in combinations of three species representing natural communities found in the sediments of the species-poor Baltic Sea. The three species, two amphipods and a...
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PMID: 20503873
PDF is available here.
PDF is available here.
Abstract
Exposure to fresh water as well as to sea water can cause unpleasant consequences. The water of lakes or biotopes may be the reason for severe itching reactions on exposed skin, caused by cercariae. Exposure to seawater may lead to skin affections including itching or burning urticarial lesions as w...
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PMID: 20486058
PDF is available here.
PDF is available here.
Abstract
Abstract
We investigated cyanobacterial toxins, specifically cylindrospermopsin (CYN), the microcystins (MCYST) and the "paralytic shellfish toxins" (PST), in Lago Catemaco (Veracruz, Mexico). Lago Catemaco is a tropical lake dominated by Cylindrospermopsis, specifically identified as Cylindrospermopsis cate...
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PMID: 19651152
PDF is available here.
PDF is available here.
Applied Optics (49)11 2010
Abstract
We used colorimetric measurements and conventional statistical tools to determine the effects on the measurement of the color of cyanobacteria, of the concentration of the microorganisms and their moisture content, as well as of the size of the target area and the minimum number of measurements. It...
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PMID: 20390000
PDF is available here.
PDF is available here.
Ecological Applications (20)3 2010
Abstract
We investigate the impacts of a regional climate scenario on lake productivity using three models in sequence and quantify the response in biomass of three phytoplankton groups. We used a watershed model (GWLF), a physical lake model (PROBE), and a phytoplankton model (PROTBAS) for simulations of a...
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PMID: 20437961
PDF is available here.
PDF is available here.
Protoplasma (240)1-4 2010
Abstract
Abstract
In November 2008 a dog died soon after ingesting benthic "algal" mat material from the Waitaki River, New Zealand. Based on a morphological examination of environmental material, the causative organism was putatively identified as the filamentous cyanobacterium Phormidium sp. Two strains (VUW25 and...
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PMID: 20043936
PDF is available here.
PDF is available here.
Abstract
We studied its role in the thermophilic cyanobacterium, Thermosynechococcus elongatus BP-1, by focusing on a psbK disruptant with hexahistidine-tagged CP47. The psbK disruptant showed photoautotrophic growth comparable with that of the wild type under a wide range of light conditions. The mutant PSI...
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PMID: 20194360
PDF is available here.
PDF is available here.
Abstract
The present study characterises sorption of two pesticides, namely, paraquat (PQ) and 2,4-dichlorophenoxyacetic acid (2,4-D) by an Oscillatoria sp.-dominated cyanobacterial mat. Sorption of PQ onto the test mat was not significantly affected by the pH of the solution within the pH range 2-7. However...
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PMID: 19634017
PDF is available here.
PDF is available here.
Abstract
The cyanobacterial phytochrome Cph1 can be photoconverted between two thermally stable states, Pr and Pfr. The photochemically induced Pfr --> Pr back-reaction has been followed at low temperature by magic-angle spinning (MAS) NMR spectroscopy, allowing two intermediates, Lumi-F and Meta-F, to be tr...
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PMID: 20205422
PDF is available here.
PDF is available here.
Abstract
We show that these differences allow the enzymes to control regioselectivity of posttranslational modifications, helping to control product chemistry in this hypervariable family of marine natural products....
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PMID: 20210311
PDF is available here.
PDF is available here.
Abstract
We found that two major groups of unicellular N2-fixing cyanobacteria (UCYN) have distinct spatial distributions that differ from those of Trichodesmium, the N2-fixing cyanobacterium previously considered to be the most important contributor to open-ocean N2 fixation. The distributions and activity...
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PMID: 20185682
PDF is available here.
PDF is available here.
European Journal of Pharmacology (629)1-3 2010
Abstract
We utilized the RAW264.7 macrophage cell line stimulated with LPS in a nitric oxide (NO) assay to screen for compounds with immunomodulatory activities from a library of marine natural products, and found that the malyngamide structure class, found commonly in the marine cyanobacterium Lyngbya majus...
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PMID: 20006962
PDF is available here.
PDF is available here.
Abstract
A simple technique was developed to make in situ measurements of emission rates of two common odorants, 2-MIB and geosmin, and was validated with different natural communities of benthic cyanobacterial mats in Hope Valley Reservoir (HVR), South Australia, and Kin-Men Water Treatment Plant (TLR-WTP),...
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PMID: 20445867
PDF is available here.
PDF is available here.
ISME Journal (4)2 2010
Abstract
We use targeted 16S rRNA gene surveys to evaluate the global affinities of cold-dwelling cyanobacteria from lake, stream and ice communities living at the northern limit of High Arctic Canada. Pigment signature analysis by HPLC confirmed the dominance of cyanobacteria in the phototrophic communities...
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PMID: 19890368
PDF is available here.
PDF is available here.
Abstract
We attempted to identify PSP toxin, ATX, and CYN producers by isolating and characterizing 92 Anabaena, Aphanizomenon, and Anabaenopsis strains from five lakes in northeast Germany. In a polyphasic approach, all strains were morphologically and phylogenetically classified and then tested for PSP tox...
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PMID: 20048055
PDF is available here.
PDF is available here.
Abstract
We report a functional analysis of SmtA in Arabidopsis thaliana and its response to zinc stress. After high zinc stress, the transgenic plants over-expressing SmtA showed higher survival rate than the wild type. We also found that over-expression of SmtA in Arabidopsis increased the activities of SO...
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PMID: 19830591
PDF is available here.
PDF is available here.
Abstract
In recent years there has been an increasing interest for application of natural products as antiinfectives and concerns about the safety of synthetic compounds have encouraged more detailed studies of natural resources. Two different strains of the nontoxic cyanobacterium Arthrospira from the Unite...
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PMID: 20225659
PDF is available here.
PDF is available here.
Abstract
I (PSI) complexes of the cyanobacteria Thermosynechococcus elongatus, Arthrospira platensis and Synechocystis sp. PCC 6803 were studied. CD spectra of dark-adapted PSI trimers and monomers, measured at 77 K, show common bands at 669-670(+), 673(+), 680(-), 683-685(-), 696-697(-), 702(-) and 711(-) n...
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PMID: 20586282
PDF is available here.
PDF is available here.
Abstract
Cyanobacteria are a simple, but primitive and diverse group of microorganisms, with characteristics in common to both bacteria and algae. Their success as a group in a wide range of habitats has been attributed to their unique physiological characters and high adaptive ability under a wide range of...
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PMID: 20391755
PDF is available here.
PDF is available here.
Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering (45)1 2010
Abstract
The toxic effects of 7 coastal cyanobacterial strains isolated from Oaxaca and Chiapas, Mexico were evaluated. Growth was determined by dry weight. Toxicity bioassays were done in Artemia sp., juvenile white shrimp Litopenaeus vannamei and mice Mus musculus (ICR strain). In shrimp, three feeding met...
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PMID: 20390852
PDF is available here.
PDF is available here.
Abstract
Lichens are symbiotic organisms of fungi and algae or cyanobacteria. Lichen-forming fungi synthesize a great variety of secondary metabolites, many of which are unique. Developments in analytical techniques and experimental methods have resulted in the identification of about 1050 lichen substances...
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PMID: 20469633
PDF is available here.
PDF is available here.