Toxin Production in Batch Cultures of Freshwater Cyanobacterium Microcystis aeruginosa

2001 ◽  
Vol 67 (3) ◽  
pp. 339-346
Author(s):  
N. Gupta ◽  
A. S. B. Bhaskar ◽  
R. S. Dangi ◽  
G. B. K. S. Prasad ◽  
P. V. Lakshmana Rao
Keyword(s):  
Microcystis Aeruginosa ◽  
Toxin Production ◽  
Batch Cultures ◽  
Freshwater Cyanobacterium

Toxin Production in Batch Cultures of Freshwater Cyanobacterium

2001 ◽  
Vol 67 (3) ◽  
pp. 0339-0346
Author(s):  
N. Gupta ◽  
A. S. B. Bhaskar ◽  
R. S. Dangi ◽  
G. B. K. S. Prasad ◽  
P. V. Lakshmana Rao
Keyword(s):  
Toxin Production ◽  
Batch Cultures ◽  
Freshwater Cyanobacterium

Gramine-induced growth inhibition, oxidative damage and antioxidant responses in freshwater cyanobacterium Microcystis aeruginosa

2009 ◽  
Vol 91 (3) ◽  
pp. 262-269 ◽  
Author(s):  
Yu Hong ◽  
Hong-Ying Hu ◽  
Xing Xie ◽  
Akiyoshi Sakoda ◽  
Masaki Sagehashi ◽  
...  
Keyword(s):  
Oxidative Damage ◽  
Growth Inhibition ◽  
Microcystis Aeruginosa ◽  
Antioxidant Responses ◽  
Freshwater Cyanobacterium

Iron uptake by bloom-forming freshwater cyanobacterium Microcystis aeruginosa in natural and effluent waters

2019 ◽  
Vol 247 ◽  
pp. 392-400 ◽  
Author(s):  
Qing-Long Fu ◽  
Manabu Fujii ◽  
Masafumi Natsuike ◽  
T. David Waite
Keyword(s):  
Microcystis Aeruginosa ◽  
Iron Uptake ◽  
Freshwater Cyanobacterium

Environmental factors associated with a toxic bloom of Microcystis aeruginosa

2000 ◽  
Vol 57 (1) ◽  
pp. 231-240 ◽  
Author(s):  
Jean M Jacoby ◽  
Diane C Collier ◽  
Eugene B Welch ◽  
F Joan Hardy ◽  
Michele Crayton
Keyword(s):  
Environmental Factors ◽  
Microcystis Aeruginosa ◽  
Toxin Production ◽  
Water Transparency ◽  
Cyanobacterial Blooms ◽  
Zooplankton Abundance ◽  
Factors Associated ◽  
Water Column Stability ◽  
Microcystin Concentration ◽  
Toxic Bloom

Environmental factors associated with the occurrence of toxic cyanobacterial blooms and toxin production were investigated during the summers of 1994 and 1995 in Steilacoom Lake, Washington. A pronounced and prolonged toxic bloom of Microcystis aeruginosa occurred during summer 1994 but not during 1995. Lake characteristics that were associated with the toxic bloom in 1994 were higher total phosphorus, decreased water transparency, high water column stability, high surface water temperature and pH, and decreased lake flushing. Decreased water transparency during 1994 may have been due to significantly lower zooplankton abundance. We hypothesize that this decreased transparency was caused by increased planktivory by higher numbers of coho salmon (Oncorhynchus kisutch) fingerlings during 1994 and (or) inhibition of zooplankton grazing by Microcystis. The success of Microcystis over other cyanobacteria was associated with low nitrogen to phosphorus ratios and low nitrate-nitrogen with sufficient ammonium-nitrogen concentrations. Toxin production (i.e., micrograms of microcystin per gram of plankton biomass) was not constant over the duration of detectable toxicity; hence, no relationship was found between Microcystis abundance and microcystin concentration. However, microcystin concentration was positively correlated with increasing soluble reactive phosphorus concentrations between 1 and 10 µg·L-1, indicating that toxin production may have been limited by phosphorus.

Growth and toxin production of Azadinium poporum strains in batch cultures under different nutrient conditions

2016 ◽  
Vol 127 ◽  
pp. 117-126 ◽  
Author(s):  
Aifeng Li ◽  
Baozhou Jiang ◽  
Huidan Chen ◽  
Haifeng Gu
Keyword(s):  
Toxin Production ◽  
Batch Cultures ◽  
Nutrient Conditions

scholarly journals Highly plastic genome of Microcystis aeruginosa PCC 7806, a ubiquitous toxic freshwater cyanobacterium

BMC Genomics ◽  
2008 ◽  
Vol 9 (1) ◽  
pp. 274 ◽  
Author(s):  
Lionel Frangeul ◽  
Philippe Quillardet ◽  
Anne-Marie Castets ◽  
Jean-François Humbert ◽  
Hans CP Matthijs ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Freshwater Cyanobacterium ◽  
Plastic Genome

Effects of linear alkylbenzene sulfonate on the growth and toxin production of Microcystis aeruginosa isolated from Lake Dianchi

2014 ◽  
Vol 22 (7) ◽  
pp. 5491-5499 ◽  
Author(s):  
Zhi Wang ◽  
Junqian Zhang ◽  
Lirong Song ◽  
Enhua Li ◽  
Xuelei Wang ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Linear Alkylbenzene Sulfonate ◽  
Toxin Production ◽  
Lake Dianchi ◽  
Linear Alkylbenzene ◽  
Alkylbenzene Sulfonate

Blood pressure and hepatocellular effects of the cyclic heptapeptide toxin produced by the freshwater cyanobacterium (blue - green alga) Microcystis aeruginosa strain PCC-7820

Toxicon ◽  
1988 ◽  
Vol 26 (7) ◽  
pp. 603-613 ◽  
Author(s):  
Winnie C. Theiss ◽  
Wayne W. Carmichael ◽  
John Wyman ◽  
Richard Bruner
Keyword(s):  
Blood Pressure ◽  
Microcystis Aeruginosa ◽  
Green Alga ◽  
Blue Green Alga ◽  
Freshwater Cyanobacterium ◽  
Cyclic Heptapeptide

scholarly journals Modeling total microcystin production by Microcystis aeruginosa using multiple regression

2020 ◽  
Vol 69 (5) ◽  
pp. 415-426 ◽  
Author(s):  
Marianna Correia Aragão ◽  
Kelly Cristina dos Reis ◽  
Allan Clemente Souza ◽  
Maria Aparecida Melo Rocha ◽  
Jose Capelo Neto
Keyword(s):  
Microcystis Aeruginosa ◽  
Multiple Linear Regression Model ◽  
Toxin Production ◽  
Raw Water ◽  
Water Safety ◽  
Initial Attempt ◽  
Mathematical Correlation ◽  
Cell Age ◽  
Microcystin Production ◽  
Water Companies

Abstract Microcystis sp. is one of the most studied genus of cyanobacteria worldwide. Once it has been identified in raw water, frequent analyses of cell density and toxic metabolites (microcystins) are recommended at the water treatment plants. However, both analytical procedures are highly time-consuming and labor-intensive, allowing the potentially contaminated finished water to reach customers. The identification of easily measurable parameters related to toxin production, preferably by on-line equipment, would mitigate this issue and help water companies to improve water safety and decrease operating costs. However, these devices still have precision limitations and need efficient mathematical models for converting light signals into cyanobacteria densities or cyanotoxin concentrations. In this scenario, this research aimed to develop a mathematical correlation between microcystin production and cell age and density, chlorophyll-a, pheophytin and phycocyanin in a Microcystis aeruginosa culture using a multiple linear regression model. Despite the significant correlation (p < 0.05) found between all the variables and total microcystin, a simplified and precise model (Adjusted R2 = 0.824) involving only phycocyanin and pheophytin concentrations was developed in order to provide an initial attempt to easily and cheaply predict microcystin concentration in raw water.

Lectin-stimulated cellular iron uptake and toxin generation in the freshwater cyanobacterium Microcystis aeruginosa

Harmful Algae ◽  
2019 ◽  
Vol 83 ◽  
pp. 25-33 ◽  
Author(s):  
Tomoko Takaara ◽  
Shiori Sasaki ◽  
Manabu Fujii ◽  
Hiroaki Ito ◽  
Yoshifumi Masago ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Iron Uptake ◽  
Cellular Iron ◽  
Freshwater Cyanobacterium ◽  
Cellular Iron Uptake
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