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https://www.readbyqxmd.com/read/29142439/screening-of-norharmane-from-seven-cyanobacteria-by-high-performance-liquid-chromatography
#1
Tunay Karan, Ramazan Erenler
Background: Cyanobacteria, including pharmaceutically and medicinally valuable compounds attract the great attention lately. Norharmane (9H-pyrido (3,4-b) indole found in some cyanobacteria revealed a great number of biological effects. Objective: Seven cyanobacteria were isolated and identified from Yesilirmak River and Gaziosmanpasa University Campus to determine the norharmane content. Materials and Methods: Cyanobacteria collected from Tokat, Turkey were isolated and identified by morphologically...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29109701/microbial-community-and-biochemical-dynamics-of-biological-soil-crusts-across-a-gradient-of-surface-coverage-in-the-central-mojave-desert
#2
Rakesh Mogul, Parag Vaishampayan, Mina Bashir, Chris P McKay, Keith Schubert, Rosalba Bornaccorsi, Ernesto Gomez, Sneha Tharayil, Geoffrey Payton, Juliana Capra, Jessica Andaya, Leonard Bacon, Emily Bargoma, David Black, Katie Boos, Michaela Brant, Michael Chabot, Danny Chau, Jessica Cisneros, Geoff Chu, Jane Curnutt, Jessica DiMizio, Christian Engelbrecht, Caroline Gott, Raechel Harnoto, Ruben Hovanesian, Shane Johnson, Britne Lavergne, Gabriel Martinez, Paul Mans, Ernesto Morales, Alex Oei, Gary Peplow, Ryan Piaget, Nicole Ponce, Eduardo Renteria, Veronica Rodriguez, Joseph Rodriguez, Monica Santander, Khamille Sarmiento, Allison Scheppelmann, Gavin Schroter, Devan Sexton, Jenin Stephenson, Kristin Symer, Tatiane Russo-Tait, Bill Weigel, Mary B Wilhelm
In this study, we expand upon the biogeography of biological soil crusts (BSCs) and provide molecular insights into the microbial community and biochemical dynamics along the vertical BSC column structure, and across a transect of increasing BSC surface coverage in the central Mojave Desert, CA, United States. Next generation sequencing reveals a bacterial community profile that is distinct among BSCs in the southwestern United States. Distribution of major phyla in the BSC topsoils included Cyanobacteria (33 ± 8%), Proteobacteria (26 ± 6%), and Chloroflexi (12 ± 4%), with Phormidium being the numerically dominant genus...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29053344/efficient-bioremediation-of-tannery-wastewater-by-monostrains-and-consortium-of-marine-chlorella-sp-and-phormidium-sp
#3
Cindrella Das, Nagappa Ramaiah, Elroy Pereira, K Naseera
This study evaluated the bioremediation potential of two marine microalgae Chlorella sp. and Phormidium sp., both individually and in consortium, to reduce various pollutants in tannery wastewater (TW). The microalgae were grown in hazardous 100% TW for 20 days, and the reductions in biochemical oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen (TN), total phosphorous (TP), chromium (Cr) and total dissolved solids (TDS) of the wastewater monitored periodically. Both marine isolates reduced the BOD and COD by ≥90% in the consortium and by over 80% individually...
October 20, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29019928/the-abundance-of-toxic-genotypes-is-a-key-contributor-to-anatoxin-variability-in-phormidium-dominated-benthic-mats
#4
Susanna A Wood, Jonathan Puddick
The prevalence of benthic proliferations of the anatoxin-producing cyanobacterium Phormidium are increasing in cobble-bed rivers worldwide. Studies to date have shown high spatial and temporal variability in anatoxin concentrations among mats. In this study we determined anatoxin quotas (toxins per cell) in field samples and compared these results to the conventionally-used concentrations (assessed per dry weight of mat). Three mats were selected at sites in two rivers and were sampled every 2-3 h for 24-26 h...
October 11, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28924251/cyanobacterial-exopolymer-properties-differentiate-microbial-carbonate-fabrics
#5
Fumito Shiraishi, Yusaku Hanzawa, Tomoyo Okumura, Naotaka Tomioka, Yu Kodama, Hiroki Suga, Yoshio Takahashi, Akihiro Kano
Although environmental changes and evolution of life are potentially recorded via microbial carbonates, including laminated stromatolites and clotted thrombolites, factors controlling their fabric are still a matter of controversy. Herein, we report that the exopolymer properties of different cyanobacterial taxa primarily control the microbial carbonates fabrics in modern examples. This study shows that the calcite encrustation of filamentous Phormidium sp. secreting acidic exopolymers forms the laminated fabric of stromatolites, whereas the encrustation of coccoid Coelosphaeriopsis sp...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28918447/an-improved-crystal-structure-of-c-phycoerythrin-from-the-marine-cyanobacterium-phormidium-sp-a09dm
#6
Ravi R Sonani, Aleksander W Roszak, Claire Ortmann de Percin Northumberland, Datta Madamwar, Richard J Cogdell
C-Phycoerythrin (PE) from Phormidium sp. A09DM has been crystallized using different conditions and its structure determined to atomic resolution (1.14 Å). In order for the pigment present, phycoerythrobilin (PEB), to function as an efficient light-harvesting molecule it must be held rigidly (Kupka and Scheer in Biochim Biophys Acta 1777:94-103, 2008) and, moreover, the different PEB molecules in PE must be arranged, relative to each other, so as to promote efficient energy transfer between them. This improved structure has allowed us to define in great detail the structure of the PEBs and their binding sites...
September 16, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28865614/identification-of-chlorophyll-molecules-with-peroxyl-radical-scavenger-capacity-in-microalgae-phormidium-autumnale-using-ultrasound-assisted-extraction
#7
Andrêssa S Fernandes, Gabriela P Nogara, Cristiano R Menezes, Alexandre J Cichoski, Adriana Z Mercadante, Eduardo Jacob-Lopes, Leila Q Zepka
The identification of chlorophyll molecules with peroxyl radical scavenger capacity in microalgae Phormidium autumnale was determined. The ultrasound-assisted extraction was utilized for obtaining the chlorophyll compounds from biomass. A total of eleven molecules were separated in microalgae chlorophyll extract, with pheophytin a' (371μg·g(-1)) and chlorophyll a (159.3μg·g(-1)) as the major ones. The chlorophyll extract was shown to be a potent scavenger of peroxyl radical, being almost 200 times more potent than α-tocopherol...
September 2017: Food Research International
https://www.readbyqxmd.com/read/28846906/spatiotemporal-dynamics-of-phormidium-cover-and-anatoxin-concentrations-in-eight-new-zealand-rivers-with-contrasting-nutrient-and-flow-regimes
#8
Tara G McAllister, Susanna A Wood, Javier Atalah, Ian Hawes
Toxic benthic cyanobacterial proliferations, particularly of the genus Phormidium, are a major concern in many countries due to their increasing extent and severity. The aim of this study was to improve the current understanding of the dominant physicochemical variables associated with high Phormidium cover and toxin concentrations. Phormidium cover and anatoxin concentrations were assessed weekly for 30weeks in eight predominately cobble-bed rivers in the South Island of New Zealand. Phormidium cover was highly variable both spatially (among and within sites) and temporally...
January 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28830829/phylogenetic-insights-into-the-diversity-of-homocytous-cyanobacteria-from-amazonian-rivers
#9
Diego Bonaldo Genuário, Marcelo Gomes Marçal Vieira Vaz, Itamar Soares de Melo
The Amazon Rainforest holds great tropical biodiversity, mainly because of its favourable climatic conditions. The high temperatures, luminosity and humidity coupled with the nutritional simplicity of cyanobacteria allow undiscovered diversity to flourish within this group of microorganisms. Some efforts to reveal this diversity have been attempted; however, most were focused on the microscopic observation of environmental samples without any genetic information. Very few studies focusing on morphological, ecological and molecular criteria have been conducted, and none have been devoted to homocytous cyanobacteria forms in Amazonia region...
November 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28736815/a-widespread-cyanobacterium-supported-by-polyphasic-approach-proposition-of-koinonema-pervagatum-gen-sp-nov-oscillatoriales-1
#10
Bruna Buch, Mariéllen Dornelles Martins, Luis Henrique Z Branco
Several new genera originally classified as the genus Phormidium, a polyphyletic and taxonomically complex genus within the Oscillatoriales, were recently described. The simple morphology of Phormidium does not reflect its genetic diversity and the delimitation of a natural group is not possible with traditional classification systems based on morphology alone. Therefore, this study used morphological, ecological, and molecular approaches to evaluate four populations morphologically similar to Ammassolinea, Kamptonema, and Ancylothrix (simple, curved, and gradually attenuated at the ends trichome), found in subtropical and tropical Brazilian regions...
July 24, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28680112/overcoming-microalgae-harvesting-barrier-by-activated-algae-granules
#11
Olga Tiron, Costel Bumbac, Elena Manea, Mihai Stefanescu, Mihai Nita Lazar
The economic factor of the microalgae harvesting step acts as a barrier to scaling up microalgae-based technology designed for wastewater treatment. In view of that, this study presents an alternative microalgae-bacteria system, which is proposed for eliminating the economic obstacle. Instead of the microalgae-bacteria (activated algae) flocs, the study aimed to develop activated algae granules comprising the microalgae Chlorella sp. as a target species. The presence of the filamentous microalgae (Phormidium sp...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28659875/predicting-species-resolved-macronutrient-acquisition-during-succession-in-a-model-phototrophic-biofilm-using-an-integrated-omics-approach
#12
Stephen R Lindemann, Jennifer M Mobberley, Jessica K Cole, L M Markillie, Ronald C Taylor, Eric Huang, William B Chrisler, H S Wiley, Mary S Lipton, William C Nelson, James K Fredrickson, Margaret F Romine
The principles governing acquisition and interspecies exchange of nutrients in microbial communities and how those exchanges impact community productivity are poorly understood. Here, we examine energy and macronutrient acquisition in unicyanobacterial consortia for which species-resolved genome information exists for all members, allowing us to use multi-omic approaches to predict species' abilities to acquire resources and examine expression of resource-acquisition genes during succession. Metabolic reconstruction indicated that a majority of heterotrophic community members lacked the genes required to directly acquire the inorganic nutrients provided in culture medium, suggesting high metabolic interdependency...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28646736/cell-damage-caused-by-ultraviolet-b-radiation-in-the-desert-cyanobacterium-phormidium-tenue-and-its-recovery-process
#13
Gaohong Wang, Songqiang Deng, Jiafeng Liu, Chaoran Ye, Xiangjun Zhou, Lanzhou Chen
Phormidium tenue, a cyanobacterium that grows in the topsoil of biological soil crusts (BSCs), has the highest recovery rate among desert crust cyanobacteria after exposure to ultraviolet B (UV-B) radiation. However, the mechanism underlying its recovery process is unclear. To address this issue, we measured chlorophyll a fluorescence, generation of reactive oxygen species (ROS), lipid peroxidation, and repair of DNA breakage in P. tenue following exposure to UV-B. We found that UV-B radiation at all doses tested reduced photosynthesis and induced cell damage in P...
October 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28644849/rapid-development-of-cyanobacterial-crust-in-the-field-for-combating-desertification
#14
Chan-Ho Park, Xin Rong Li, Yang Zhao, Rong Liang Jia, Jae-Seoun Hur
Desertification is currently a major concern, and vast regions have already been devastated in the arid zones of many countries. Combined application of cyanobacteria with soil fixing chemicals is a novel method of restoring desertified areas. Three cyanobacteria, Nostoc sp. Vaucher ex Bornet & Flahault, Phormidium sp. Kützing ex Gomont and Scytonema arcangeli Bornet ex Flahault were isolated and tested in this study. Tacki-SprayTM (TKS7), which consists of bio-polysaccharides and tackifiers, was used as a soil fixing agent...
2017: PloS One
https://www.readbyqxmd.com/read/28602983/box-behnken-design-for-extraction-optimization-of-crude-polysaccharides-from-tunisian-phormidium-versicolor-cyanobacteria-ncc-466-partial-characterization-in-vitro-antioxidant-and-antimicrobial-activities
#15
Dalel Belhaj, Donyez Frikha, Khaled Athmouni, Bouthaina Jerbi, Mohammad Boshir Ahmed, Zouhaier Bouallagui, Monem Kallel, Sami Maalej, John Zhou, Habib Ayadi
In this study, response surface methodology (RSM) based on Box-Behnken design (BBD) was employed to optimize the aqueous extraction of crude polysaccharides from Tunisian cyanobacteria Phormidium versicolor (NCC 466). The optimal extraction conditions with an extraction yield of 21.56±0.92% were as follows: extraction temperature at 81.05°C, extraction time of 3.99h, and water to raw material ratio of 21.52mLg(-1). Crude Phormidium versicolor polysaccharides (CPv-PS) are found to be a hetero-sulfated-anionic polysaccharides that contained carbohydrate (79...
June 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28559886/global-diversity-of-desert-hypolithic-cyanobacteria
#16
Donnabella C Lacap-Bugler, Kevin K Lee, Stephen Archer, Len N Gillman, Maggie C Y Lau, Sebastian Leuzinger, Charles K Lee, Teruya Maki, Christopher P McKay, John K Perrott, Asunción de Los Rios-Murillo, Kimberley A Warren-Rhodes, David W Hopkins, Stephen B Pointing
Global patterns in diversity were estimated for cyanobacteria-dominated hypolithic communities that colonize ventral surfaces of quartz stones and are common in desert environments. A total of 64 hypolithic communities were recovered from deserts on every continent plus a tropical moisture sufficient location. Community diversity was estimated using a combined t-RFLP fingerprinting and high throughput sequencing approach. The t-RFLP analysis revealed desert communities were different from the single non-desert location...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28367229/robust-high-productivity-phototrophic-carbon-capture-at-high-ph-and-alkalinity-using-natural-microbial-communities
#17
Christine E Sharp, Sydney Urschel, Xiaoli Dong, Allyson L Brady, Greg F Slater, Marc Strous
BACKGROUND: Bioenergy with carbon capture and storage (BECCS) has come to be seen as one of the most viable technologies to provide the negative carbon dioxide emissions needed to constrain global temperatures. In practice, algal biotechnology is the only form of BECCS that could be realized at scale without compromising food production. Current axenic algae cultivation systems lack robustness, are expensive and generally have marginal energy returns. RESULTS: Here it is shown that microbial communities sampled from alkaline soda lakes, grown as biofilms at high pH (up to 10) and high alkalinity (up to 0...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28341397/degradation-of-textile-dyes-by-cyanobacteria
#18
Priscila Maria Dellamatrice, Maria Estela Silva-Stenico, Luiz Alberto Beraldo de Moraes, Marli Fátima Fiore, Regina Teresa Rosim Monteiro
Dyes are recalcitrant compounds that resist conventional biological treatments. The degradation of three textile dyes (Indigo, RBBR and Sulphur Black), and the dye-containing liquid effluent and solid waste from the Municipal Treatment Station, Americana, São Paulo, Brazil, by the cyanobacteria Anabaena flos-aquae UTCC64, Phormidium autumnale UTEX1580 and Synechococcus sp. PCC7942 was evaluated. The dye degradation efficiency of the cyanobacteria was compared with anaerobic and anaerobic-aerobic systems in terms of discolouration and toxicity evaluations...
January 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28138721/cyanobacterial-contribution-to-travertine-deposition-in-the-hoyoux-river-system-belgium
#19
Julia Kleinteich, Stjepko Golubic, Igor S Pessi, David Velázquez, Jean-Yves Storme, François Darchambeau, Alberto V Borges, Philippe Compère, Gudrun Radtke, Seong-Joo Lee, Emmanuelle J Javaux, Annick Wilmotte
Travertine deposition is a landscape-forming process, usually building a series of calcareous barriers differentiating the river flow into a series of cascades and ponds. The process of carbonate precipitation is a complex relationship between biogenic and abiotic causative agents, involving adapted microbial assemblages but also requiring high levels of carbonate saturation, spontaneous degassing of carbon dioxide and slightly alkaline pH. We have analysed calcareous crusts and water chemistry from four sampling sites along the Hoyoux River and its Triffoy tributary (Belgium) in winter, spring, summer and autumn 2014...
July 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28073542/the-rise-of-toxic-benthic-phormidium-proliferations-a-review-of-their-taxonomy-distribution-toxin-content-and-factors-regulating-prevalence-and-increased-severity
#20
REVIEW
Tara G McAllister, Susanna A Wood, Ian Hawes
There has been a marked increase in the distribution, intensity and frequency of proliferations of some species of the benthic mat-forming, toxin-producing genus Phormidium in rivers globally over the last decade. This review summarises current knowledge on their taxonomy, distribution, toxin content, environmental drivers of proliferations, and monitoring and management strategies in New Zealand. Although toxic Phormidium proliferation occurs in rivers worldwide little is known about these factors in most countries...
May 2016: Harmful Algae
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