Results 11 to 20 of about 12,360 (230)

Phytoplankton growth and potential cyanotoxin production differ in response to nitrogen and phosphorus amendments in late summer communities from Kabetogama Lake (Minnesota, United States). [PDF]

J Phycol
Abstract Cyanotoxins such as microcystin (MC), cylindrospermopsin, and saxitoxin are secondary metabolites that are rich in nitrogen (N). Most cyanobacteria grow best on reduced inorganic N (ammonium, NH4), but when NH4 is absent, cyanobacteria can activate physiological pathways to process other N forms (e.g., nitrate; NO3).
Larson JH, Maki RP, Bailey SW, Christensen VG, Loftin KA, Stelzer EA, Smith JC, McWhorter SA.   +7 more
europepmc   +2 more sources

Effects of different doses of microcystin-LR exposure on gut development and the microbiota of Xenopus laevis tadpoles [PDF]

BMC Microbiology
Background Although the acute toxicity of microcystin-LR has been widely confirmed, its effects on aquatic organisms at environmental concentrations have not been systematically studied.
Jinjin Li, Yuanyuan Zhang, Jiajia Ni, Wenxuan Hou, Lei Huang, Hanping Pan, Chenxu Wang, Kaixin Wang, Shaoyuan Zuo, Jiahao Dong, Mingyu Zhang   +10 more
doaj   +2 more sources

Potential Linkage Between Zebra Mussel Establishment, Cyanobacterial Community Composition, and Microcystin Levels in United States Lakes [PDF]

Toxins
Zebra mussel invasion of North American lakes during the last century may play an important role in the occurrence of toxic cyanobacterial blooms. However, empirical evidence quantifying their influence on cyanobacterial community dynamics at broad ...
Feng Zhang, Jayun Kim, Ozeas S. Costa, Song Liang, Jiyoung Lee   +4 more
doaj   +2 more sources

Initial Assessment of the Detectability of Cyanotoxin Occurrence Using PACE Satellite Observations

Geophysical Research Letters
Microcystin is a major public health hazard during freshwater cyanobacterial blooms, yet its remote detection remains challenging because it lacks any direct optical absorption features.
Denesh Karunakaran, Ardeshir Ebtehaj, Lucas Clark Burnette, Miki Hondzo, Leif Olmanson   +4 more
doaj   +2 more sources

simpson-lab/quappelle-microcystin-paper: Updated data and script [PDF]

, 2021
There was an inconsistency between the microcystin variable named in the data files and assumed in the main data analysis script. In addition, the raw microcystin data were uploaded but we actually used a censored version wherein all observations that ...
Gavin Simpson
core   +1 more source

Increasing Microcystis cell density enhances microcystin synthesis: a mesocosm study [PDF]

, 2012
An experimental protocol using mesocosms was established to study the effect of Microcystis sp. cell abundance on microcystin production. The mesocosms (55 L) were set up in a shallow eutrophic lake and received either no (control), low (to simulate a ...
Dietrich, Daniel R, Cary, S. Craig, Hamilton, David P, Dietrich, Daniel R., Wood, Susanna A., Wood, Susanna A, Cary, S Craig, Hamilton, David P.   +7 more
core   +1 more source

The cyanobacterial hepatotoxin microcystin binds to proteins and increases the fitness of microcystis under oxidative stress conditions. [PDF]

PLoS ONE, 2011
Microcystins are cyanobacterial toxins that represent a serious threat to drinking water and recreational lakes worldwide. Here, we show that microcystin fulfils an important function within cells of its natural producer Microcystis.
Yvonne Zilliges, Jan-Christoph Kehr, Sven Meissner, Keishi Ishida, Stefan Mikkat, Martin Hagemann, Aaron Kaplan, Thomas Börner, Elke Dittmann   +8 more
doaj   +1 more source

Chirality in microcystins [PDF]

Journal of the American Society for Mass Spectrometry, 1994
A new method has been developed to identify the isomers of amino acids by derivatization of the corresponding standards with 1-fluoro-2,4-dinitrophenyl-5-L-alanine amide (Marfey's reagent or FDAA) and analysis of the diastereomeric derivatives by a liquid chromatography-thermospray mass spectrometry technique.
openaire   +2 more sources

Widespread distribution and identification of eight novel microcystins in Antarctic cyanobacterial mats [PDF]

, 2008
The microcystin content and cyanobacterial community structure of Antarctic microbial mat samples collected from 40 ponds, lakes and hydro-terrestrial environments were investigated. Samples were collected from Bratina Island and four of the Dry Valleys;
Puddick, Jonathan, Mountfort, Douglas O., Holland, Patrick T., Cary, S. Craig, Wood, Susanna A., Selwood, Andrew I.   +5 more
core   +1 more source

Temporal Dynamics of the Microbial Community Composition with a Focus on Toxic Cyanobacteria and Toxin Presence during Harmful Algal Blooms in Two South German Lakes

Frontiers in Microbiology, 2017
Bacterioplankton plays an essential role in aquatic ecosystems, and cyanobacteria are an influential part of the microbiome in many water bodies. In freshwaters used for recreational activities or drinking water, toxic cyanobacteria cause concerns due to
Pia I. Scherer, Andrew D. Millard, Andreas Miller, Renate Schoen, Uta Raeder, Juergen Geist, Katrin Zwirglmaier   +6 more
doaj   +1 more source