The effects of 5‐azacytidine and cadmium on global 5‐methylcytosine content and secondary metabolites in the freshwater microalgae Chlamydomonas reinhardtii and Scenedesmus quadricauda

2019 ◽  
Vol 55 (2) ◽  
pp. 329-342 ◽  
Author(s):  
Romana Bacova ◽  
Borivoj Klejdus ◽  
Pavel Ryant ◽  
Natalia Cernei ◽  
Vojtech Adam ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Chlamydomonas Reinhardtii ◽  
Scenedesmus Quadricauda ◽  
Freshwater Microalgae

New insights into mechanisms of copper nanoparticle toxicity in freshwater algae Chlamydomonas reinhardtii: Effects on the pathways of secondary metabolites

2021 ◽  
Vol 60 ◽  
pp. 102476
Author(s):  
Anna Janova ◽  
Martina Kolackova ◽  
Zuzana Bytesnikova ◽  
Petr Capal ◽  
Pavel Chaloupsky ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Chlamydomonas Reinhardtii ◽  
Copper Nanoparticle ◽  
Freshwater Algae ◽  
Nanoparticle Toxicity

scholarly journals Étude de l'absorption des phosphates, azote, chrome et cadmium par trois algues vertes isolées à partir d'effluents urbains

2005 ◽  
Vol 17 (3) ◽  
pp. 317-328 ◽  
Author(s):  
R. A. Zerhouni ◽  
D. Bouya ◽  
C. Ronneau ◽  
J. Cara
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Chlorella Pyrenoidosa ◽  
Scenedesmus Quadricauda

La capacité de déphosphatation et de dénitrification ainsi que la sensibilité et l'accumulation de deux métaux lourds (Cr et Cd) de Scenedesmus quadricauda, Chlorella pyrenoidosa et Chlamydomonas reinhardtii isolées des eaux usées de la ville de Fès, ont été étudiées dans les conditions de laboratoire. Les résultats ont montré que S. quadricauda présente les meilleurs taux de réduction des phosphates (83%), et d'ammonium (75%). L'étude de la sensibilité vis à vis du chrome et du cadmium des trois espèces, a montré qu'au delà d'une concentration de 1 ppm, la croissance se trouve réduite et que S. quadricauda présente une sensibilité plus faible que les deux autres espèces. Les résultats des expériences d'absorption conduites avec du chrome VI marqué au51 Cr et du cadmium marqué au109 Cd ont montré que les quantités de chrome et du cadmium prélevées par S. quadricauda dépassent celles des deux autres espèces. L'utilisation potentielle des trois espèces dans le traitement des effluents urbains est discutée à la lumière des résultats de ces expériences.

Copper and lead internalisation by freshwater microalgae at different carbonate concentrations

2013 ◽  
Vol 10 (2) ◽  
pp. 80 ◽  
Author(s):  
Paula Sánchez-Marín ◽  
Claude Fortin ◽  
Peter G. C. Campbell
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Metal Ion ◽  
Metal Uptake ◽  
Dissolved Inorganic Carbon ◽  
Aquatic Organisms ◽  
Ion Concentration ◽  
Bulk Solution ◽  
Freshwater Microalgae ◽  
Closed Systems ◽  
Free Metal

Environmental context Metal–carbonato complexes have been reported to contribute to metal uptake and toxicity in aquatic organisms. We show that in the presence of lead–carbonato complexes, Pb internalisation by the microalga Chlamydomonas reinhardtii is higher than that predicted on the basis of the free Pb2+ concentration. This effect, which was not observed for another microalga that takes up Pb more slowly, is attributed to the very high rates of Pb uptake by C. reinhardtii, which result in diffusion limitation. Abstract The possible contribution of metal–carbonato complexes to metal uptake or toxicity has been mentioned several times in the literature, often in studies where dissolved inorganic carbon (DIC) concentrations and pH were varied together, but a thorough study of the effect on DIC on metal bioavailability to aquatic organisms has not been done. By using closed systems – allowing changes in DIC concentrations at fixed pH – and ion selective electrodes to determine free metal ion concentrations, we show that lead internalisation by the unicellular alga Chlamydomonas reinhardtii in the presence of high DIC concentrations is higher than predicted by the free Pb2+ ion concentration at bulk [Pb2+] lower than 50nM, but not at higher [Pb2+]. This effect is not observed for another microalga, Chlorella vulgaris, which shows a lower rate of Pb internalisation. Copper internalisation by C. reinhardtii seems also to be slightly higher than predicted on the basis of free Cu2+ at low (20nM) bulk Cu2+ concentrations but not at higher ones. The possibility that Pb (and Cu) internalisation by C. reinhardtii is partially limited by diffusion from the bulk solution to the algal surface is identified and discussed as a possible explanation for these results.

Effect of Four Triazine Herbicides on Growth of Nontarget Green Algae

Weed Science ◽  
1992 ◽  
Vol 40 (1) ◽  
pp. 134-142 ◽  
Author(s):  
Hiran Hiranpradit ◽  
Chester L. Foy
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Chlorophyll Content ◽  
Green Algae ◽  
Chlorella Pyrenoidosa ◽  
Scenedesmus Quadricauda ◽  
Continuous Exposure ◽  
Triazine Herbicides ◽  
Algae Growth ◽  
Selection Of

Colorimetry, nephelometry, and chlorophyll assays of cultures ofChlamydomonas reinhardtiiDangeard,Chlorella pyrenoidosaChick., andScenedesmus quadricauda(Turp.) Bréb. were used as criteria for measuring algae growth. Among the fours-triazines studied, cyprazine appeared to be the most inhibitory to algae growth, followed by atrazine > simazine > cyanazine. Stimulatory effects of cyanazine, simazine, and cyprazine on chlorophyll content ofC. reinhardtiiandC. pyrenoidosawere also observed. Cyanazine was most stimulatory on both species but simazine also showed stimulation. Cyprazine was stimulatory only toC. reinhardtiiat 0.22 μM concentration but apparently was inhibitory toC. pyrenoidosaat the same concentration. In one experiment, atrazine caused a slight stimulation inC. reinhardtii. Averaged over two consecutive experiments, however, atrazine was inhibitory. Chlorophyll content of the algae was found to be the best criterion for determining effect of the chemicals on algae growth. Continuous exposure ofC. reinhardtiiculture to the highest concentration of each of the four herbicides resulted in selection of algal lines having increased triazine tolerance.

Lycorine and UV-C stimulate phenolic secondary metabolites production and miRNA expression in Chlamydomonas reinhardtii

2020 ◽  
Vol 391 ◽  
pp. 122088 ◽  
Author(s):  
Martina Kolackova ◽  
Pavel Chaloupsky ◽  
Natalia Cernei ◽  
Borivoj Klejdus ◽  
Dalibor Huska ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Chlamydomonas Reinhardtii ◽  
Mirna Expression ◽  
Metabolites Production ◽  
Uv C

Lycopene alleviates sulfamethoxazole-induced hepatotoxicity in grass carp (Ctenopharyngodon idellus) via suppression of oxidative stress, inflammation and apoptosis

2020 ◽  
Vol 11 (10) ◽  
pp. 8547-8559
Author(s):  
Hongjing Zhao ◽  
Yu Wang ◽  
Mengyao Mu ◽  
Menghao Guo ◽  
Hongxian Yu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Secondary Metabolites ◽  
Human Health ◽  
Grass Carp ◽  
Aquatic Environment ◽  
Ctenopharyngodon Idellus

Antibiotics are used worldwide to treat diseases in humans and other animals; most of them and their secondary metabolites are discharged into the aquatic environment, posing a serious threat to human health.

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