Fig. 3

Photosynthetic parameters of WT and ∆ssaA mutant during recovery from nitrogen starvation. a Orange light-excited fluorescence emission spectra of WT and ∆ssaA mutant at 77 K after 14 h of recovery (+N). The spectra were normalized by dividing by the peak value of PSI at 721 nm and setting this value to 1. Oxygen evolution rates of electron transport in PSII (b) and photosynthesis (c) measured in vivo at time point 16 - 22 h + N under light-saturated conditions (3000 μmol photons m⁻² s⁻¹). Three independent biological replicates were measured and the error bars represent the standard deviation