Figure 5.

Changes in steady-state CPD levels in the 3rd leaves of TOG12380-OxPHR (pink line) and TOG12380-PL (orange line) rice plants grown with or without supplementary UVB radiation. (a) Changes to the steady-state CPD levels in transgenic and PL plants growing without supplementary UVB radiation. (b–d) Changes to the steady-state CPD levels in transgenic and PL plants grown with supplementary UVB radiation. Plants were first grown under visible radiation without supplementary UVB radiation in a large growth cabinet until their 3rd leaves had expanded fully. Then, some of the potted plants were grown under visible radiation with (b) 4.9 kJ m⁻² day⁻¹, (c) 9.8 kJ m⁻² day⁻¹, and (d) 14.7 kJ m⁻² day⁻¹ supplementary UVB radiation. Over the next 2 days, from groups of plants their 3rd leaves were detached after every 12 h (8 AM to 8 PM on the first day, 8 PM to 8 AM, and 8 AM to 8 PM of second day). The CPD levels in the leaf DNAs were then determined. Values are means ± SD for n = 3 replicates; asterisks indicate significant differences determined by the Tukey-Kramer test (P < .05), ns = not significant. The pale-green shaded area indicates the dark treatment.