Table 2. Effect of different DCCD (N,N′-dicyclohexyl-carbodiimide) concentrations on the maximal efficiency of PSII photochemistry (F_V/F_M) and on NPQ.

	0 µM	2 µM	5 µM	10 µM
NPQ	1.17	0.64	0.74	0.37
FV/FM	0.75	0.71	0.73	0.65

F_V/F_M values were calculated for dark adapted sample, NPQ was detected after 120 s irradiation by orange light (620 nm, 600 µmol m⁻² s⁻¹).