Fig. 8

Phenotypes of bypass transgenics when grown in elevated or reduced CO₂ environment. a In elevated CO₂ conditions (1500 ppm), bypass plants have no detectable growth advantage over WT plants. b, c At 5 weeks of age, bypass transgenics grown in high CO₂ showed no significant height or leaf number advantage over WT (dark red bars). This is in contrast with the significant advantage (marked by asterisk) in height and leaf number observed in bypass transgenics in ambient CO₂ conditions (light gray bars). d When plants are grown in ambient CO₂ and exposed to low CO₂ conditions (100 ppm) for 5 h, WT show a shriveling response, which is not shown by the bypass transgenics. 10 ≤ n ≤ 12, error bars standard error