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. 2013 Feb 1;64(6):1485–1496. doi: 10.1093/jxb/ert005

Fig. 1.

Fig. 1.

Maximum in vivo rate of Rubisco carboxylation (V cmax) and maximum electron transport rate for RUBP regeneration (J max) and J max/V cmax in the young leaf (leaf 4) of an old (released in 1961) and a modern (released in 1997) wheat cultivar exposed to elevated CO2 and/or O3 for 21 d in OTCs. Control (CO2, 385±4 ppm+CFA, 4±0.02 ppb O3); elevated CO2 (CO2, 714±16 ppm+CFA, 4±0.02 ppb O3); O3 (ambient CO2, 385±4 ppm+elevated O3, 72±5 ppb O3 for 7h d–1, 9.00–16.00h) and elevated CO2+O3 (elevated CO2, 714±16 ppm+elevated O3, 72±5 ppb for 7h d–1). Overall, elevated CO2 significantly (P <0.05) increased V cmax, J max, and J max/V cmax in the young leaf. Exposure to O3 did not alter in vivo biochemical parameters in the young leaf. Results are shown as means±1 standard error (n=6).