The combined effects of Dolichospermum flos-aquae, light, and temperature on microcystin production by Microcystis aeruginosa

2016 ◽  
Vol 34 (6) ◽  
pp. 1173-1182 ◽  
Author(s):  
Ruoqi Chen ◽  
Fangfang Li ◽  
Jiadong Liu ◽  
Hongye Zheng ◽  
Fei Shen ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Combined Effects ◽  
Microcystin Production

Evaluation of changes in Microcystis aeruginosa growth and microcystin production by urea via transcriptomic surveys

2019 ◽  
Vol 655 ◽  
pp. 181-187 ◽  
Author(s):  
Yanping Zhou ◽  
Xufeng Zhang ◽  
Xuan Li ◽  
Peili Jia ◽  
Ruihua Dai
Keyword(s):  
Microcystis Aeruginosa ◽  
Microcystin Production

Microcystin production by Microcystis aeruginosa: Direct regulation by multiple environmental factors

Harmful Algae ◽  
2011 ◽  
Vol 12 ◽  
pp. 95-104 ◽  
Author(s):  
Sabine Jähnichen ◽  
Benedict M. Long ◽  
Thomas Petzoldt
Keyword(s):  
Environmental Factors ◽  
Microcystis Aeruginosa ◽  
Microcystin Production ◽  
Direct Regulation

scholarly journals Microcystin Production by Microcystis aeruginosa in a Phosphorus-Limited Chemostat

2000 ◽  
Vol 66 (1) ◽  
pp. 176-179 ◽  
Author(s):  
Hee-Mock Oh ◽  
Seog June Lee ◽  
Min-Ho Jang ◽  
Byung-Dae Yoon
Keyword(s):  
Microcystis Aeruginosa ◽  
High Performance ◽  
Specific Growth ◽  
Dry Weight ◽  
Atomic Ratio ◽  
Uv Detector ◽  
Fixation Rate ◽  
P Limitation ◽  
P Content ◽  
Microcystin Production

ABSTRACT The production of microcystins (MC) from Microcystis aeruginosa UTEX 2388 was investigated in a P-limited continuous culture. MC (MC-LR, MC-RR, and MC-YR) from lyophilized M. aeruginosa were extracted with 5% acetic acid, purified by a Sep-Pak C18 cartridge, and then analyzed by high-performance liquid chromatography with a UV detector and Nucleosil C18 reverse-phase column. The specific growth rate (μ) ofM. aeruginosa was within the range of 0.1 to 0.8/day and was a function of the cellular P content under a P limitation. The N/P atomic ratio of steady-state cells in a P-limited medium varied from 24 to 15 with an increasing μ. The MC-LR and MC-RR contents on a dry weight basis were highest at μ of 0.1/day at 339 and 774 μg g−1, respectively, while MC-YR was not detected. The MC content of M. aeruginosa was higher at a lower μ, whereas the MC-producing rate was linearly proportional to μ. The C fixation rate at an ambient irradiance (160 microeinsteins m−2s−1) increased with μ. The ratios of the MC-producing rate to the C fixation rate were higher at a lower μ. Accordingly, the growth of M. aeruginosa was reduced under a P limitation due to a low C fixation rate, whereas the MC content was higher. Consequently, increases in the MC content per dry weight along with the production of the more toxic form, MC-LR, were observed under more P-limited conditions.

Effects of glufosinate on the growth of and microcystin production by Microcystis aeruginosa at environmentally relevant concentrations

2017 ◽  
Vol 575 ◽  
pp. 513-518 ◽  
Author(s):  
Quan Zhang ◽  
Qin Song ◽  
Cui Wang ◽  
Cong Zhou ◽  
Chengsheng Lu ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Microcystin Production

Simulated microgravity alters growth and microcystin production in Microcystis aeruginosa (cyanophyta)

Toxicon ◽  
2010 ◽  
Vol 56 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Yuan Xiao ◽  
Yongding Liu ◽  
Gaohong Wang ◽  
Zongjie Hao ◽  
Yanjun An
Keyword(s):  
Microcystis Aeruginosa ◽  
Simulated Microgravity ◽  
Microcystin Production

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.

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