Flavodiiron Proteins in Oxygenic Photosynthetic Organisms: Photoprotection of Photosystem II by Flv2 and Flv4 in Synechocystis sp. PCC 6803
Figure 5
PSII fluorescence and the phenotype of the Δflv mutants.
Cells were grown at HC and 50 µmol photons m−2 s−1 or at LC under 15, 50, 120 or 200 µmol photons m−2 s−1. (A) The amplitude of the flash-induced variable Chl fluorescence of the WT and Flv mutant cells was measured in the presence of 20 µM DCMU and at a Chl concentration of 5 µg Chl/ml. The results are shown as a percentage of the amplitude of the flash-induced variable Chl fluorescence in the WT-cells grown at HC (set as 100%). ±SD for three independent experiments. (B) Photographs of cell cultures grown under HC and 50 µmol photons m−2 s−1, (C) under LC and 50 µmol photons m−2 s−1, (D) under LC and 200 µmol photons m−2 s−1.