Fig. 2.

Growth phenotypes of tobacco wild type and two transplastomic ∆psaI lines under (A) low-light conditions (100 µE m⁻² s⁻¹), (B) intermediate-light conditions (350 µE m⁻² s⁻¹), and (C) high-light conditions (1000 µE m⁻² s⁻¹). Except for the differences in actinic light intensity, all other environmental parameters such as day length, temperature, and relative humidity were kept constant. While under low and intermediate light intensities, no growth phenotype was observed; under high-light conditions, growth of the two transplastomic tobacco lines was slightly retarded.