Allelopathic Influence of Cyanobacteria Microcystis aeruginosa on Green Algae Chlorella vulgaris

2014 ◽  
pp. 141-150 ◽  
Author(s):  
Adam Żak ◽  
Alicja Kosakowska
Keyword(s):  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Chlorella Vulgaris

scholarly journals Toxic effect of fluorene-9-bisphenol to green algae Chlorella vulgaris and its metabolic fate

2021 ◽  
Vol 216 ◽  
pp. 112158
Author(s):  
Huijun Zhang ◽  
Tengda Ding ◽  
Xu Luo ◽  
Juying Li
Keyword(s):  
Toxic Effect ◽  
Green Algae ◽  
Chlorella Vulgaris ◽  
Metabolic Fate

A partial structure for the toxin BE-4 from the blue-green algae, Microcystis aeruginosa

1983 ◽  
pp. 652 ◽  
Author(s):  
Sitthivet Santikarn ◽  
Dudley H. Williams ◽  
Richard J. Smith ◽  
Stephen J. Hammond ◽  
Dawie P. Botes ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Partial Structure ◽  
Blue Green Algae

Demographic responses of selected rotifers (Rotifera) and cladocerans (Cladocera) fed toxic Microcystis aeruginosa (Cyanobacteria)

2020 ◽  
Vol 193 (3) ◽  
pp. 261-274
Author(s):  
Alfredo Pérez-Morales ◽  
S.S.S. Sarma ◽  
S. Nandini ◽  
Cristian Alberto Espinosa-Rodríguez ◽  
Ligia Rivera-De la Parra
Keyword(s):  
Population Growth ◽  
Life Table ◽  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Somatic Growth ◽  
Phytoplankton Species ◽  
Scenedesmus Acutus ◽  
Cladoceran Species ◽  
Toxic Cyanobacteria ◽  
Demographic Responses

Tropical waterbodies contain several species of toxic cyanobacteria including Microcystis, which adversely affect the somatic growth, survival and fecundity of zooplankton. Scenedesmus, one of the most common green algae, is even found in Microcystis -dominated waterbodies. It is, therefore possible that in natural ponds, rotifers and cladocerans feed on mixed phytoplankton species containing algae and cyanobacteria. In this work, we quantified demographic responses of three rotifer species (Brachionus calyciflorus, B. rubens, and Plationus patulus), and three cladoceran species (Simocephalus mixtus, Daphnia cf. mendotae and Moina macrocopa) fed toxic Microcystis aeruginosa only or mixed with Scenedesmus acutus. The highest population growth for both rotifer and cladoceran species was observed when Scenedesmus was offered alone or at 75 % of the diet. Daphnia cf. mendotae and B. rubens were less affected by Microcystis while M. macrocopa and B. calyciflorus were more adversely influenced, which was also corroborated by life table demography. In competition bioassays, D. cf. mendotae was more efficient, alone or in competition, when fed with 50 or 25 % of Microcystis. This work explains the dynamics of the zooplanktonic community against gradual changes in phytoplankton due to the presence of cyanobacteria.

scholarly journals Selective Inhibition on Growth and Photosynthesis of Harmful Cyanobacteria (Microcystis aeruginosa) by Water Soluble Substances of Dendranthema indicum Flowers

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2014
Author(s):  
Yunni Gao ◽  
Fang Zhang ◽  
Jing Wu ◽  
Hui Yang ◽  
Jing Dong ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Solid Phase ◽  
Haematococcus Pluvialis ◽  
Growth Promotion ◽  
Selective Inhibition ◽  
Water Soluble ◽  
Cyanobacterial Blooms ◽  
Aqueous Extracts ◽  
Active Substances

Harmful cyanobacterial blooms become serious environmental issues in various waterbodies, including aquaculture ponds, which inherently need a high biomass and healthy composition of phytoplankton to sustain their high productivity. Indoor bioassays were conducted to investigate the effects of an aqueous extract of Dendranthema indicum flowers on cyanobacteria and green algae species. The thermal stability and polarity of the water-soluble active substances of D. indicum flowers were also assessed based on the growth and photosynthesis responses of Microcystis aeruginosa. There was obvious growth promotion of green algae, including Chlorella vulgaris, Kirchneriella sp. and Haematococcus pluvialis and strong growth inhibition of toxigenic and non-toxigenic M. aeruginosa by aqueous extracts of D. indicum flowers at concentrations ranging from 0.5 to 2.0 g·DW·L−1. The cell concentrations of M. aeruginosa and C. vulgaris were 46.5% and 242.2% of those in the corresponding controls after a 10-day exposure to aqueous extracts of D. indicum flowers at 1.0 g·DW·L−1. There must be some water-soluble active allelochemicals released from D. indicum flowers that are responsible for the selective inhibition of M. aeruginosa rather than green algae. The inhibition ratio of the growth and photosynthesis of M. aeruginosa by aqueous extracts of D. indicum flowers at 2.0 g·DW·L−1 prepared with water at 25 °C and 100 °C were above 90% and 80% compared to the cell density and performance index on absorption basis (PIABS) value of M. aeruginosa in the control on day 6, without significant differences. It indicates that the active substances of D. indicum flowers were thermally stable. The methanol fraction eluted from solid phase extraction (SPE)-enriched aqueous extracts of D. indicum flowers showed the strongest inhibition of the growth and photosynthesis of M. aeruginosa compared to the other four fractions. It indicates that the most polar substances of D. indicum flowers were responsible for the selective inhibition of M. aeruginosa. More experiments are required to identify the responsible active substances and reveal the underlying mechanisms of aqueous extracts of D. indicum flowers that selectively inhibit cyanobacteria and regulate the phytoplankton community structure.

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