Fig. 7
Analysis of room temperature chlorophyll fluorescence during photosynthesis under EL. a Chlorophyll fluorescence was monitored at 24 °C in dark-adapted cultures. Cell suspensions were illuminated for 20 min and the thermal energy dissipation (NPQ) was determined during steady-state photosynthesis. Symbols and error bars show mean ± SD (n = 4). b PSII repair efficiency was quantified on WT, PG-14 and SOR strains plants by measuring Fv/Fm (PSII photoinhibition) recovery in low light (LL—20 μmol photons m−2 s−1, 24 °C) after photoinhibitory treatment (HL—1800 μmol photons m−2 s−1, 24 °C, 3 h) that reduce the Fv/Fm value to ~ 0,3 in all genotypes. Data are expressed as mean ± SD (n = 4)