Relationships between simulated photosynthetic leaf N content (_Np_ac) (A), net photosynthesis (_A_n) (B) and photosynthetic N use efficiency (PNUE) (C) and the photosynthetic traits _k_3 and _J_fac under standard mean environmental conditions (PPFD = 666 µmol m−2 s−1, _T_g = 16.9°C, _h_s = 0.74).
_k_3 is the ratio between and _Np_a. _J_fac is the ratio between _J_max and . A mesh of _k_3 values varying between 10 and 300 µmol g−1 N s−1 with 20 steps and of _J_fac values varying between 1.75 and 3.5 with 0.05 steps was used. Figures D–E–F, relationships between (_Np_ac) (D), net photosynthesis (_A_n) (E) and photosynthetic N use efficiency (PNUE) (F) and the radiation (PPFD) and temperature (_T_g) conditions during growth. Averages over the dataset of leaf photosynthetic parameters (_k_3, _J_fac and SLA) are used (_k_3 = 59.1 µmol g−1 _N_pa s−1, _J_fac = 2.45, SLA = 17.7 m2 kg−1 DM). The mesh for temperature is 0.5°C between 10 and 30°C and the mesh for radiation is 50 µmol m−2 s−1 between 300 and 1200 µmol m−2 s−1. The values of _h_s and _T_g were fixed at 0.8 and 20°C, respectively. _A_n was calculated with the coordinated leaf protein content and PNUE was calculated as the ratio between _A_n and _Np_ac.