Table 2.

Altered amino acid contents of had1-2, had1-3, er-ant1, and had1-2 x er-ant1 mutants when compared with wt plants

Amino acid	had1-2 (%)	had1-3 (%)	er-ant1 (%)	had1-2 x er-ant1 (%)
Asp	95	98	12***	93*
Glu	104	93	24***	82*
Glycine	158	102	6,847***	6363***
Ala	115	104	20***	96
Arg	109	122	847***	124

Notes: Plants were grown at 2,000 ppm CO₂ for 4 weeks and subsequently shifted to ambient air for 5 d. Samples were taken on the fifth day, 5 h after onset of light. Shown are the mean values of four individual replicates. The obtained concentrations were normalized to the respective wt concentration (set to 100%). Asterisks indicate the significance levels between wt and mutants according to a Student’s t test.

^* P < 0.05,

^*** P < 0.001.