Table 3.
Wild‐type | 1a3b | 1a2b | 1AAt | 1AAtMOD | S2Cr | |
---|---|---|---|---|---|---|
GA Low (μmol m−2 s−1) | 9.48 ± 0.56a | 4.58 ± 0.4c | 5.69 ± 0.53c | 8.73 ± 0.09ab | 8.57 ± 0.64ab | 6.72 ± 0.49bc |
GA amb (μmol m−2 s−1) | 6.17 ± 0.36a | 2.98 ± 0.25d | 3.67 ± 0.36 cd | 5.6 ± 0.15ab | 5.49 ± 0.42ab | 4.36 ± 0.38bc |
J NADPHlow (μmol m−2 s−1) | 18.9 ± 1.1a | 9.1 ± 0.8c | 11.4 ± 1.1c | 17.5 ± 0.2ab | 17.1 ± 1.3ab | 13.4 ± 0.9bc |
J NADPHamb (μmol m−2 s−1) | 19.9 ± 0.9a | 9.2 ± 0.7c | 11.9 ± 0.9bc | 18.4 ± 0.2a | 18.2 ± 1.4a | 14.1 ± 1b |
V o (μmol m−2 s−1) | 2.21 ± 0.13a | 1.06 ± 0.11b | 1.34 ± 0.12b | 2.09 ± 0.06a | 2.06 ± 0.17a | 1.57 ± 0.07ab |
V c (μmol m−2 s−1) | 7.27 ± 0.43a | 3.52 ± 0.29d | 4.35 ± 0.41c | 6.64 ± 0.12ab | 6.52 ± 0.49ab | 5.15 ± 0.42bc |
V o/V c | 0.304 ± 0.002a | 0.302 ± 0.013a | 0.307 ± 0.008a | 0.313 ± 0.015a | 0.316 ± 0.012a | 0.307 ± 0.011a |
Arabidopsis thaliana plants (35–40 d old) were measured under 300 μmol photons m−2 s−1, and ambient CO2 of 300 μmol mol−1 as in Bellasio et al. (2014). For wild‐type, 1a3b and 1a2b values are the means ± SE of measurements made on individual leaves from five different rosettes. For transgenic lines, values are means ± SE of measurements made on 15 rosettes, five from each of the three lines. Values are followed by letters indicating significant difference (P < 0.05), as determined by ANOVA followed by Tukey's HSD tests. Values followed by the same letter are not significantly different. GA low, gross photosynthetic rate (A+R d) under 2% O2 (2%); GA amb, gross photosynthetic rate under 21% O2; J NADPHlow, NADPH produced for photosynthesis (derived from electron transport rate) under 2% O2; J NADPHamb, NADPH produced for photosynthesis under 21% O2; V o, Rubisco oxygenation rate; V c, Rubisco carboxylation rate.