. 2017 Jan 13;214(2):655–667. doi: 10.1111/nph.14414

Table 3.

Estimates of in vivo Rubisco oxygenase and carboxylase activities made from measurements of gas exchange and chlorophyll fluorescence under ambient (21%) or low (2%) O₂

	Wild‐type	1a3b	1a2b	1A_At	1A_AtMOD	S2_Cr
GA _Low (μmol m⁻² s⁻¹)	9.48 ± 0.56^a	4.58 ± 0.4^c	5.69 ± 0.53^c	8.73 ± 0.09^ab	8.57 ± 0.64^ab	6.72 ± 0.49^bc
GA _amb (μmol m⁻² s⁻¹)	6.17 ± 0.36^a	2.98 ± 0.25^d	3.67 ± 0.36 ^cd	5.6 ± 0.15^ab	5.49 ± 0.42^ab	4.36 ± 0.38^bc
J _NADPHlow (μmol m⁻² s⁻¹)	18.9 ± 1.1^a	9.1 ± 0.8^c	11.4 ± 1.1^c	17.5 ± 0.2^ab	17.1 ± 1.3^ab	13.4 ± 0.9^bc
J _NADPHamb (μmol m⁻²s⁻¹)	19.9 ± 0.9^a	9.2 ± 0.7^c	11.9 ± 0.9^bc	18.4 ± 0.2^a	18.2 ± 1.4^a	14.1 ± 1^b
V _o (μmol m⁻² s⁻¹)	2.21 ± 0.13^a	1.06 ± 0.11^b	1.34 ± 0.12^b	2.09 ± 0.06^a	2.06 ± 0.17^a	1.57 ± 0.07^ab
V _c (μmol m⁻² s⁻¹)	7.27 ± 0.43^a	3.52 ± 0.29^d	4.35 ± 0.41^c	6.64 ± 0.12^ab	6.52 ± 0.49^ab	5.15 ± 0.42^bc
V _o/V _c	0.304 ± 0.002^a	0.302 ± 0.013^a	0.307 ± 0.008^a	0.313 ± 0.015^a	0.316 ± 0.012^a	0.307 ± 0.011^a

Arabidopsis thaliana plants (35–40 d old) were measured under 300 μmol photons m⁻²s⁻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.