Results 41 to 50 of about 1,141 (157)

Benthic Archives Reveal Recurrence and Dominance of Toxigenic Cyanobacteria in a Eutrophic Lake over the Last 220 Years

Toxins, 2017
Akinetes are resistant cells which have the ability to persist in sediment for several decades. We have investigated the temporal distribution of akinetes of two species, Dolichospermum macrosporum and Dolichospermum flos-aquae, in a sediment core ...
Benjamin Legrand, Amélie Lamarque, Marion Sabart, Delphine Latour   +3 more
doaj   +1 more source

Influence of cyanobacteria, mixotrophic flagellates, and virioplankton size fraction on transcription of microcystin synthesis genes in the toxic cyanobacterium Microcystis aeruginosa

MicrobiologyOpen, Volume 7, Issue 1, February 2018., 2018
This study aimed to determine whether co‐occurring microorganisms influence the expression of microcystin biosynthesis genes using RT‐qPCR. We utilized representatives from three different plankton groups: the picocyanobacterium Synechococcus elongatus, the unicellular flagellate grazer Ochromonas danica, and virioplankton from two different lakes. Our
Pia I. Scherer, Carolin Absmeier, Maria Urban, Uta Raeder, Juergen Geist, Katrin Zwirglmaier   +5 more
wiley   +1 more source

Limited Microcystin, Anatoxin and Cylindrospermopsin Production by Cyanobacteria from Microbial Mats in Cold Deserts

Toxins, 2020
Toxic metabolites are produced by many cyanobacterial species. There are limited data on toxigenic benthic, mat-forming cyanobacteria, and information on toxic cyanobacteria from Central Asia is even more scarce.
Nataliia Khomutovska, Małgorzata Sandzewicz, Łukasz Łach, Małgorzata Suska-Malawska, Monika Chmielewska, Hanna Mazur-Marzec, Marta Cegłowska, Toirbek Niyatbekov, Susanna A. Wood, Jonathan Puddick, Jan Kwiatowski, Iwona Jasser   +11 more
doaj   +1 more source

Phytoplankton Community and Algal Toxicity at a Recurring Bloom in Sullivan Bay, Kabetogama Lake, Minnesota, USA [PDF]

, 2019
Kabetogama Lake in Voyageurs National Park, Minnesota, USA suffers from recurring late summer algal blooms that often contain toxin-producing cyanobacteria.
Christensen, Victoria G., Khan, Eakalak, Maki, Ryan P., Norlan, Jack E., Stelzer, Erin A.   +4 more
core   +2 more sources

Genetic variability of microcystin biosynthesis genes in Planktothrix as elucidated from samples preserved by heat desiccation during three decades.

PLoS ONE, 2013
Historic samples of phytoplankton can provide information on the abundance of the toxigenic genotypes of cyanobacteria in dependence on increased or decreased eutrophication.
Veronika Ostermaier, Guntram Christiansen, Ferdinand Schanz, Rainer Kurmayer   +3 more
doaj   +1 more source

Secondary metabolite gene expression and interplay of bacterial functions in a tropical freshwater cyanobacterial bloom [PDF]

, 2014
Cyanobacterial harmful algal blooms (cyanoHABs) appear to be increasing in frequency on a global scale. The Cyanobacteria in blooms can produce toxic secondary metabolites that make freshwater dangerous for drinking and recreation.
A Nishizawa, AI Saeed, C Straub, CN Shulse, D Haft, D Nonneman, D Tillett, DG Bourne, E Briand, E Dittmann, E Litchman, EA Ottesen, EA Welsh, F Haupt, FI Kappers, G Christiansen, G Pan, HW Paerl, I Stewart, I van Gremberghe, IM Ehrenreich, J Shao, J-F Humbert, Janelle R Thompson, JF Blom, Jia Wang, K Furukawa, K Gin, K Nakasugi, K Sellner, Kevin Penn, KU Foerstner, L Frangeul, L Kelly, M Di Lorenzo, M Jimbo, M Oliynyk, M Vila-Costa, M Yoshida, MA Johnson, MF Chislock, MF Watanabe, MJ Harke, MM Steffen, N Gan, N Ziemert, N Ziemert, N Ziemert, OV Kaluzhnaya, RA Mella-Herrera, S Meissner, S Pouria, Samodha C Fernando, SH Te, SM Gifford, T Nishizawa, T Rohrlack, T Rohrlack, T Rohrlack, T Rounge, W Fenical, WD Swingley, WW Carmichael, WW Carmichael, X Mou, Y Tanabe, Y Zilliges   +66 more
core   +1 more source

Reconstitution and Expression of mcy Gene Cluster in The Model Cyanobacterium Synechococcus 7942 Reveals a Roll of MC-LR in Cell Division

bioRxiv, 2022
Cyanobacterial blooms pose a serious threat to public health due to the presence of cyanotoxins. The most common cyanotoxins, microcystins (MCs), can cause acute poisoning at high concentrations and hepatocellular carcinoma following chronic exposure ...
Yanli Zheng, Chunling Xue, Hui Chen, Anqi Jia, Liang Zhao, Junli Zhang, Lixin Zhang, Qiang Wang   +7 more
semanticscholar   +1 more source

Recombination and selectional forces in cyanopeptolin NRPS operons from highly similar, but geographically remote strains [PDF]

, 2008
Background Cyanopeptolins are nonribosomally produced heptapetides showing a highly variable composition. The cyanopeptolin synthetase operon has previously been investigated in three strains from the genera Microcystis, Planktothrix and ...
Rounge, Trine B, Rohrlack, Thomas, Kristensen, Tom, Jakobsen, Kjetill S   +3 more
core   +2 more sources

Morphological characteristics and phylogenetic analyses of unusual morphospecies of Microcystis novacekii forming bloom in the Cheffia Dam (Algeria)

Journal of Limnology, 2009
The toxicological potential and morphological characteristics and phylogenetic analysis based on the 16S rDNA sequence and the 16S-23S rDNA internal transcribed spacer (ITS) were investigated in unusual morphospecies of Microcystis (MCYS-CH01) isolated ...
Noureddine BOUAÏCHA, Soumaya EL HERRY, Hichem NASRI   +2 more
doaj   +1 more source

Isolation and Characterization of Cylindrospermopsis raciborskii Strains from Finished Drinking Water

Toxins, 2020
In the summer of 2015, an intense cyanobacterial bloom producing geosmin/2-methylisoborneol (MIB) occurred in the Roxo freshwater reservoir in Alentejo, Portugal.
Carina Menezes, Elisabete Valério, Maria João Botelho, Elsa Dias   +3 more
doaj   +1 more source