Figure 7. Impact of Cr-PTOX1 on plant under high light.

Cr-PTOX1-I plants were grown at 50 µmol photons m⁻² s⁻¹ for a period of 4 weeks (A) and at 125 µmol photons m⁻² s⁻¹ for 10 weeks (B). (C) The plants grown in (B) were placed at 50 µmol photons m⁻² s⁻¹ for 6 weeks. The wildtype plants shown in (B) and (C) are shown for comparison purposes and were not germinated at the same time as the mutant. (D) Phenotypic comparison of two nuclear transformants, At-PTOX-1 and AT-PTOX-2, and transplastomic Cr-PTOX1-I plants at 4-week-old stage grown at 125 µmol photons m⁻² s⁻¹. (E) PSII maximum quantum efficiency was determined by recording Fv/Fm on attached 4–6 week-old healthy leaves of WT and Cr-PTOX1-I plants grown under low light (50 µmol photons m⁻² s⁻¹) and high light conditions (125 µmol photons m⁻² s⁻¹). The leaves were dark adapted for one hour before measuring fluorescence.