Table 1. *OJIP parameters calculated from the direct fast imaging and P&P imaging measurements*Values represent medians ± se (*n* = 5 different plants). Asterisk signs denote significant differences between the two groups according to the Mann-Whitney test (**P* < 0.05, ***P* < 0.01), which was done as a comparison of two methods: Direct fast imaging and P&P imaging. Parameter definitions according to Stirbet and Govindjee (2011): *V*_{I}_{/}_{J}, relative variable fluorescence at the I/J step; *M*_{o}, approximate value of the initial slope of relative variable Chl fluorescence curve *V*_{t}; Φ_{Po}, maximum quantum yield of primary PSII photochemistry (equals *F*_{v}/*F*_{m}); ABS/RC, absorption flux/effective antenna size of an active reaction center; TRo/RC, trapped energy flux leading to a reduction of Q_{A}; ET2o/RC, electron transport flux further than Q_{A}; DIo/RC, dissipation flux.