Table I.

Net CO₂ fixation by leaves of greenhouse-grown control maize and chamber-grown W22 and bsd2-m1 leaves at various incident light intensities

PPFD	Net CO2 Fixation
	Control	W22	bsd2-m1
	μmol m−2 s−1
100	1.24	0.94	−0.04a
400	6.04	3.81	0.17
1300	20

Each value is the mean of two measurements on three leaves per plant type. se values were no more than 10%.

^aNegative value indicates net CO₂ evolution in the light.