The in vivo analysis of net CO2 assimilation rate (A) versus active photosynthetic photon flux density (DFFFA) and versus intercellular CO2 concentration (Ci), allows a more detailed evaluation of the photosynthetic process. The A/DFFFA curve can be used to establish the maximal DFFFA in which the absorbed light energy is quenched in the formation of photochemical products. Using the A/Ci curves, it was calculated the maximum rates of Rubisco carboxilation (Vc,max) of 89.3 µmol m-2 s-1, the maximum rates of Rubisco oxygenation (Vo,max) of 24.7 µmol m-2 s-1, the maximum rates of electron transport (Jmax) of 159.8 µmol m-2 s-1, from which the RuBP regeneration is dependent, the mitochondrial respiration (Rd) of 0.88 µmol m-2 s-1, and the mesophyll conductance (g m) of 0.47 mol m-2 s-1 for common bean cultivated in Brazil (Phaseolus vulgaris var. mexicanus).
common bean; mathematical models; Phaseolus vulgaris var. mexicanus
