Leaves of tomato plants grown in the different growth media showed an increase in the net CO2 assimilation rate (A), according to an increase in PPFD from 85 to saturation levels 1200lmolm2 s1. No significant differences among treatments were observed below 1200lmolm2 s1 PPFD. Plants grown in CM showed the highest rate (Fig. 1). The results for A are in