On the control of Microcystis aeruginosa and Synechococccus species using an algicidal bacterium, Stenotrophomonas F6, and its algicidal compounds cyclo-(Gly-Pro) and hydroquinone

2015 ◽  
Vol 28 (1) ◽  
pp. 345-355 ◽  
Author(s):  
Shengqin Lin ◽  
Mengxin Geng ◽  
Xianglong Liu ◽  
Jing Tan ◽  
Hong Yang
Keyword(s):  
Microcystis Aeruginosa ◽  
Algicidal Bacterium ◽  
Algicidal Compounds

scholarly journals Combined treatment of toxic cyanobacteria Microcystis aeruginosa with hydrogen peroxide and microcystin biodegradation agents results in quick toxins elimination

2018 ◽  
Vol 65 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Dariusz Dziga ◽  
Anna Maksylewicz ◽  
Magdalena Maroszek ◽  
Sylwia Marek
Keyword(s):  
Hydrogen Peroxide ◽  
Secondary Metabolites ◽  
Microcystis Aeruginosa ◽  
Combined Treatment ◽  
Cell Lysis ◽  
Water Reservoirs ◽  
Promising Alternative ◽  
Toxic Cyanobacteria ◽  
Algicidal Compounds

In some conditions the growth of toxic cyanobacteria must be controlled by treatment with algicidal compounds. Hydrogen peroxide has been proposed as an efficient and relatively safe chemical which can remove cyanobacteria from the environment selectively, without affecting other microorganisms. However, the uncontrolled release of secondary metabolites, including toxins may occur after such a treatment. Our proposal presented in this paper is fast biodegradation of microcystin released after cell lysis induced by hydrogen peroxide. The effectiveness of both Sphingomonas sp. and heterologously expressed MlrA enzyme in the removal of the toxin from Microcystis aeruginosa culture has been investigated. The results indicate that neither Sphingomonas cells nor MlrA are affected by hydrogen peroxide in the concentrations which stop the growth of cyanobacteria. A several-fold microcystin reduction was documented in the presence of these agents with biodegradation ability. Our results provide evidence that such a combined treatment of water reservoirs dominated by microcystin-producing cyanobacteria may be a promising alternative which allows fast elimination of toxins from the environment.

Removal Characteristics of Microcystis aeruginosa with One Brevibacillus parabrevis Strain

2010 ◽  
Vol 113-116 ◽  
pp. 928-931
Author(s):  
Rui Min Mu ◽  
Xue Liang Yuan ◽  
Gui Xia Ma
Keyword(s):  
16S Rdna ◽  
Microcystis Aeruginosa ◽  
Removal Efficiency ◽  
Water Body ◽  
Gene Sequence ◽  
Physiological Characteristics ◽  
16S Rdna Gene ◽  
Rdna Gene ◽  
Algicidal Bacterium ◽  
Brevibacillus Parabrevis

In this study, one strain of algicidal bacterium H01 was selected from the water body polluted by Microcystis aeruginosa. It had good removal effects on Microcystis aeruginosa and the removal characteristics on Microcystis aeruginosa were studied. The results indicated that the removal efficiency was connected with such factors as temperature and pH. And the experiment on algicidal mechanism indicated that it lysed the algae cells by secreting metabolites. According to the analysis of its physiological characteristics and 16S rDNA gene sequence, the strain H01 was identified as Brevibacillus parabrevis.

scholarly journals Encapsulation and Algicidal Properties of Fermentation Products From Vibrio brasiliensis H115

2021 ◽  
Vol 8 ◽  
Author(s):  
Liao Ouyang ◽  
Yan Liu ◽  
Huirong Chen ◽  
Madiha Zaynab ◽  
Xuewei Yang ◽  
...  
Keyword(s):  
Fermentation Broth ◽  
Algicidal Bacteria ◽  
Fermentation Products ◽  
Fermentation Time ◽  
Preparation Conditions ◽  
Algicidal Bacterium ◽  
Algae Blooms ◽  
Repeated Batch Fermentation ◽  
Repeated Batch ◽  
Algicidal Compounds

Algicidal bacteria offer an eco-friendly and promising approach for controlling harmful algae blooms (HABs). In this study, repeated batch fermentation of immobilized algicidal bacterium Vibrio brasiliensis H115 was preformed to enhance the productivity of the algicidal compounds. The highest algicidal efficiency of the fermentation products against Akashiwo sanguinea (100%) was achieved when the fermentation time was decreased from 24 to 14 h. The cell-free fermentation broth was then spray-dried and floating microcapsules were prepared from the dried powder. The optimum preparation conditions for floating microcapsules were: sodium alginate (SA), 3%; CaCO3: SA (mass ratio), 3:4; CaCl2, 3%; citric acid, 4%; ethylcellulose, 2%; crosslinking time, 30 min. Under the optimal conditions, the floating microcapsules displayed efficient A. sanguinea cell lysis ability and the algicidal efficiency increased from 10.62% (4 h) to 100% (24 h). These results suggest that the floating microcapsules could potentially be practically used for controlling the outbreaks of A. sanguinea.

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