Chronic Toxicity Of High Molecular Weight Polynuclear Aromatic Hydrocarbon- Pyrene On Freshwater Cyanobacterium Anabaena Fertlissima Rao

Abstract

The aim of this work was to determine the consequences of Polynuclear aromatic hydrocarbon – Pyrene in response to growth, pigments and metabolic study on Anabaena fertilissima Rao. Test organisms were treated at different doses and encountered LC50 (Lethal concentration at which 50% growth reduction occur) concentration separately at 1.5 mg/l, 3.0 mg/l and 6.0 mg/l respectively for Anabaena fertilissima Rao. The influence of Pyrene on growth, pigments, release of metabolites such as carbohydrates, protein, amino acid, phenols was carried out. The test doses caused a concentration dependent decrease in pigments like carotenoids and phycobilliproteins and showed more sensitivity to pyrene. Depletion of carbohydrate by 13% to 81% and proteins by 47% to 93% was encountered with rise in pyrene concentrations after 16th day of exposure. However, phenols were found to rise by 27% to 50% with increased pyrene concentrations on the contrary, amino acids were reported to decline by 79% to 92%. This study therefore suggests high molecular weight pyrene that decreases in metabolite content and enzyme activity can be used as a signal of PAHs toxicity in cyanobacteria. International Journal of Environment, Volume-2, Issue-1, Sep-Nov 2013, Pages 175-183 DOI: http://dx.doi.org/10.3126/ije.v2i1.9220

Metabolic relation of cyanobacteria to aromatic compounds

“…The influence of pyrene, a polyaromatic hydrocarbon pollutant of growing concern, was investigated in a similar way in Synechocystis sp., Anabaena fertilissima and Nostoc muscorum. In this case, a comparable response to that of anthracene was obtained (Patel et al 2013; Kumar et al 2014). Very recently, Zhang et al (2018) studied the effects of pyrene and naphthalene on the growth rate, phycobiliprotein concentration, microcystin content and antioxidant enzyme activity of Microcystis aeruginosa .…”

Ecobiological study of Artemia salina L. and first determination of the toxicity of ammonium sulphate

“…The toxicity of each chemical differs from one organism to another (Patel et al 2013). Delisle et al (1977) and Greenwood et al (1984), studied sulphates and found that high values of this parameter can be observed in polluted streams, at the level of industrial waste areas (mining industry, pulp and paper mills, tanneries, textile mills).…”

An academic review of the first two volumes of the International Journal of Environment (IJE)

“…Besides, high organic carbon and total nitrogen, PAHs, heavy metal concentrations, low soil fertility index, pH and low moisture contents probably dwindle the growth of fungal strains in the contaminated soil. Patel et al (2013) determined the consequences of Polynuclear aromatic hydrocarbonPyrene in response to growth, pigments and metabolic study on Anabaena fertilissima Rao. This study therefore suggests high molecular weight pyrene that decreases in metabolite content and enzyme activity can be used as a signal of PAHs toxicity in cyanobacteria.…”