Table 2.

Correlation coefficients between changes in photosynthetic parameters induced by VP and [CO₂]-lowering.

Parameters	VP under [CO2] = 360 ppm	[CO2]- lowering to 10–15 or 150 ppm	VP under [CO2] = 10–15 ppm
n	17	19	11
EF(PSII)min- EF(PSII)initial and EF(C)min - EF(C)initial	0.11	−	−0.15
EF(PSII)min- EF(PSII)initial and EF(C)max- EF(C)min	−0.89*	−0.85*	−0.04
EF(PSII)min- EF(PSII)initial and ϕND max - ϕND initial	−0.90*	−0.90*	−0.73
ϕND max - ϕND initial and EF(C)max- EF(C)min	0.80*	0.77*	−0.20

^*Correlation coefficient is significant (p < 0.05), Student t-test.