The effect of fullerenes C60 and C70 on the growth and photosynthesis of the algae culture Scenedesmus quadricauda
G.A. Dallakyan, V.I. Ipatova, I.V. Mikheev, A.M. Lazareva, S.I. Poghosyan
Because of the increasing production of fullerenes and the likelihood of their release into the environment, studies of the effects of their impact on biological systems, on aquatic organisms, are becoming especially relevant. The effects of the action of an aqueous dispersion of fullerenes C60 and C70 at concentrations of 1, 5, and 10 mg/L on the cell number, the efficiency of photosynthesis, and the proportion of living cells in the culture of a traditional test object Scenedesmus guadricauda are described. The experiments were carried out on Uspensky medium in 100 ml conical flasks with 50 ml of medium in triplicate for each concentration and control for 17 days. A significant stimulating effect on the change of the cell number and the efficiency of photosynthesis is shown during the experiment. In the presence of 10 mg/L fullerene C60 or C70, the stimulation of the photosynthesis efficiency of the culture was up to 25% and 14%, respectively, compared to the control, and concentrations of 1 mg/L and 5 mg/L did not cause a significant effect. At the same time, when exposed to 10 mg/L of fullerene C60 and C70, the cell number increased by 27% and 20%, respectively, and with 5 mg/L of fullerene C60, the stimulating effect was less expressed. When both fullerene C60 and fullerene C70 were added to the medium, in the range of 1–10 mg/L, the cells remained viable during the experiment, while the proportion of living cells was at the control level (98-99%).