Materials

Gross photosynthetic rate (GP_n) in 2% O₂ (µmol CO₂・m⁻²・s⁻¹)

Net photosynthetic rate (P_n) in 21% O₂ (µmol CO₂・m⁻²・s⁻¹)

Photorespiration rate (P_r)

(µmol CO₂・m⁻²・s⁻¹)

P_r in 21% O₂/GP_n in 2% O₂ (%)

Maize fifth leaves (M5)

20.73 ± 0.15 a

20.27 ± 0.32 a

0.47 ± 0.06 b

2.24 c

Maize first leaves (M1)

14.57 ± 0.32 b

11.97 ± 0.21 b

2.60 ± 0.22 a

17.80 b

Tobacco leaves (T5)

6.57 ± 0.20 c

3.70 ± 0.23 c

2.87 ± 0.33 a

43.50 a