Fig. 5
Impact of Pt2015 knockout and overexpression on photosynthetic activity. The light intensity dependence of photosynthetic parameters has been monitored in the wild type (WT), Pt2015 knockout strain (2015KO), and the Pt2015 overexpression (oeT) strains. The quantum yield of photosystem I [Y(I)] (A), the quantum yield of photosystem II [Y(II)] (B), Y (NA) (C),Y (ND) (D), Y (NO) (E) and Y (NPQ) (F). G The rate of oxygen evolution in the WT, 2015KO, and oeT strains under 100 μmol photons m−2 s−1. H The rate of oxygen evolution in the WT, 2015KO, and oeT strains under 2000 μmol photons m−2 s−1. I The rate of oxygen evolution in the WT, 2015KO, and oeT strains under increasing light intensity (50, 100, 200, 400, 800, 1600, and 2800 μmol photons m−2 s−1). Data represent the mean ± standard deviation (SD) of four biological replicates. The different letters indicate that there was significant difference between WT, 2015KO, and oeT