of CO2 assimilation (data not shown) by a reiteration procedure
based on a genetic algorithm which looked for parameter values
that realized the minimum sum of squares between observations
and simulations.
The parameter value ˛ (quantum efficiency in mol electrons
per mol photons) was set at the value as derived for each wavelength
from the LICOR 7000 measurements. The measurements
used to calculate ˛ were under non-photorespiratory conditions.
Gross photosynthesis per wavelength was calculated for a rose crop
having a leaf area index (LAI) of 3, receiving 30molm−2 s−1 of diffuse
photosynthetically active radiation at the top of the canopy, at
a CO2 concentration of 350ppm and an air temperature of 22 ◦C.