When PPFD was set at 80 lmol m2 s
1
, CO2 concentration of 650 ± 50 ll l1 is better than that of
950 ± 50 ll l1 or 350 ± 50 ll l1
, which indicated that under a given light intensity, CO2 concentration
enrichment has an optimum range that provides the most favorable growth conditions for the plantlets.
Tab