Fig. 2.

Accumulation of photorespiratory metabolites in WT and plgg1-1 plants. WT and plgg1-1 plants were grown in 3,000-ppm CO₂ conditions for 4 wk and then shifted to ambient air. Steady-state metabolite levels were measured for plants kept at high CO₂ and after 2- and 5-d shift to ambient air. All values are measured in micromole per gram of fresh weight, except hydroxypyruvate, which is shown as arbitrary units. (A) Glycolate. (B) Glyoxylate. (C) Glycine. (D) Serine. (E) Hydroxypyruvate. (F) Glycerate. Error bars indicate SD; n = 3.