Table 5.

Glycine and serine levels (relative to the internal standard molecule) measured by GC–MS of whole rosette leaves harvested after 6 h in the light period from plants grown at 30 μmol quanta m⁻² s⁻¹ (30 μE; non-photorespiratory conditions) and after transferring the plants for 6 h under 600 μmol quanta m⁻² s⁻¹ (600 μE; photorespiratory conditions).

	Wild type		GMK3
	30 μE	600 μE	30 μE	600 μE
Glycine	0.67 ± 0.03	59.62 ± 7.20	0.59 ± 0.08	10.94 ± 1.90
Serine	16.80 ± 1.20	9.70 ± 1.40	7.72 ± 1.80	6.80 ± 0.50
Gly/Ser	0.040 ± 0.001	6.238 ± 0.206	0.076 ± 0.011	1.609 ± 0.235

Gly/Ser, glycine to serine ratio. The values presented are normalized per area and are means ± SE of two replicates of pools of at least eight plants each and those set in bold case indicate significant differences to the wild type values (Student’s t-test P < 0.05).