alexa Two-fold Decrease|Journals Open Access|two-fold Decrease

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Two-fold Decrease

"Decrease in pyrene concentration to 25 ppm led to a two-fold decrease in biomass level (40% decrease,); this suggestedthat a greater sensitivity to pyrene than phenanthrene at a common low concentration (10 ppm) does not necessarily result in a proportionatelyhigher toxicity at elevated concentrations (such as 25 ppm). A completely different pattern was observed in case of benzo(a) pyrene (Figure 2C) in comparison to phenanthrene and pyrene. At 10 ppm concentration, there was a significant increase (20%) in biomassproductionin comparison to the control probably because of the recognized cell proliferation effect of this PAH toward eukaryotic cells. At 25 ppm concentration, there was a growth inhibition but the mycelial mass was reduced by only 30%, a figure significantlylower than those observed for phenanthrene (50%) and pyrene (40%). Taken together (10 and 25 ppm), fungal growth inhibition effect exhibited by the PAHs followed the trend pyrene>phenanthrene>benzo(a)pyrene, suggesting that there was no uniform pattern of tolerance across the PAH types. Since pyrene showed the lowest threshold limit of tolerance (10 ppm), it was used as a model PAH for further investigationsin mixture studies with Cd. OMICS Group International is one of the leading Open Access Publishers which is publishing 350 scholarly open access journals with the support of 30,000 well-versed scholars as editorial team and aimed to disseminate the scholarly knowledge to the scientific society. OMICS Group also organizing 100 international scientific conferences and events yearly all over the world with the support of 100+ scientific associations worldwide.
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