Figure 5.
Quantum yield of ETR (A–D), ETRmax (E–H), and the curvature factor θ (I–L) for the diurnal and conventional (rapid) curves response of ETR to irradiance in leaf 8 of four cultivars of rice. All parameters are obtained from using Equation 3 using the Microsoft Excel curve fitting utility attached as Supplemental Data S1. For calculation of diurnal model parameters φETR and θ, ETRmax was constrained at the highest value predicted from fitting the conventional response curves for each cultivar as Azucena 235.1 ± 20.6, MAGIC 236.2 ± 11.32, Moroberekan 296.2 ± 16.4, and IR64-21 202 ± 19.8.