. 2011 May 25;17(3):291–295. doi: 10.1007/s12298-011-0066-6

Table 1.

Effect of different CO₂ concentrations on C_i/C_a and C_i/g_s ratios in Cannabis sativa varieties. Values within a parameter (C_i/C_a or C_i/g_s) followed by the same letter are not significantly different at p < 0.05. C_i—intercellular CO₂ concentration, C_a—ambient CO₂ concentration, g_s—stomatal conductance

Parameters	CO₂ Levels (μmol mol⁻¹)	Cannabis varieties
Parameters	CO₂ Levels (μmol mol⁻¹)	HPM	K2	MX	W1
C_i/C_a	390	0.58 ± 0.06^a	0.58 ± 0.07 ^a	0.57 ± 0.04 ^a	0.60 ± 0.08 ^a
	545	0.66 ± 0.05 ^a	0.59 ± 0.05 ^a	0.61 ± 0.06 ^a	0.57 ± 0.05 ^a
	700	0.64 ± 0.08 ^a	0.56 ± 0.08 ^a	0.57 ± 0.05 ^a	0.61 ± 0.07 ^a
C_i/g_s	390	1.12 ± 0.14 ^a	1.02 ± 0.15 ^a	1.22 ± 0.18 ^a	1.03 ± 0.16 ^a
	545	2.19 ± 0.19 ^ab	1.62 ± 0.13 ^ab	2.31 ± 0.27 ^ab	1.15 ± 0.13 ^ab
	700	3.84 ± 0.22 ^b	3.36 ± 0.26 ^b	3.15 ± 0.25 ^b	2.48 ± 0.21 ^ab