Figure 1.

Effects of light intensity on photosynthetic vitality and H₂O₂ degradation after an addition of different H₂O₂ concentrations. The graphs show the decrease in (A–E) the photosynthetic vitality of Microcystis PCC 7806 and (F–J) H₂O₂ concentration, during the first 4 h after the addition of (A,F) 1 mg/L, (B,G) 2 mg/L, (C,H) 4 mg/L, (D,I) 6 mg/L and (E,J) 10 mg/L of H₂O₂. Photosynthetic vitality is defined as the photosynthetic yield of cells treated with H₂O₂ as a percentage of the control samples of cells not exposed to H₂O₂. Dots represent data of two independent biological replicates per treatment. Lines represent the average over the two biological replicates, where different colors represent different light intensities, and dashed black lines represent the control without H₂O₂.