Figure 3.

Modeled transitional variation in x (A and B), P_bs (Pa; C and D), and v_o/v_c (µmol m⁻² s⁻¹; E and F) in maize and M. giganteus with changes in light quality in the order RGB, blue, red, blue, green, blue, and RGB at an irradiance of 900 µmol quanta m⁻² s⁻¹. g_bs was estimated (0.0046 μmol m⁻² s⁻¹ Pa⁻¹ for maize and 0.01 μmol m⁻² s⁻¹ Pa⁻¹ for M. giganteus) using data obtained from the first 1 h of RGB measurements assuming x = 0.4. For the other light treatments, x was solved, assuming g_bs was constant, to minimize the least-square difference between modeled and measured Δ¹³C. The gray areas show the sensitivity of the modeled parameters assuming different values of g_bs (between 0.0069 and 0.0023 μmol m⁻² s⁻¹ Pa⁻¹ for maize and between 0.015 and 0.005 μmol m⁻² s⁻¹ Pa⁻¹ for M. giganteus).