Figure 8.

Wavelength Dependence of Quantum Yield Losses due to Absorption by Carotenoids and Nonphotosynthetic Pigments.

Quantum yield for CO₂ fixation for 18 different wavelengths (400 to 720 nm) calculated from gas-exchange measurements (i.e., measured values of α as in Figure 2B; solid lines) and from the in vivo efficiency balance between the two photosystems as shown in Figure 7A (α_est; dotted lines). Note that light absorption by carotenoids and nonphotosynthetic pigments has not been taken into account in the calculation of α_est. Graphs (A), (B), and (C) correspond to leaves grown under the sunlight spectrum, the shade light spectrum, and the blue irradiance, respectively. Error bars indicate the se (n = 3).