Figure 6.

Degree of resistance to CO₂ diffusion through the leaf mesophyll over time in Arabidopsis with altered CGR2 and CGR3 expression. A, B, C, The δ¹³C_VPDB value calculated as the ratio of ¹³C to ¹²C isotopes in leaf tissue relative to a VPDB value; D, E, F, CO₂ partial pressure at Rubisco at three different harvests (H) is shown for Col-0, cgr2com, CGR2OX, and cgr2/3. H2, H3, and H4 correspond to 49, 63, and 82 DAS, respectively. Values represent the mean ± se and n = 5 plants per line. Statistical differences at α = 0.05 are marked with lower-case letters.