Effects of UV-B treatment on anthocyanin and chlorophyll levels in the rosette leaves of wild-type and transgenic lipase-suppressed Arabidopsis plants. At 3.5 weeks of age, plants were either treated with UV-B for a period of 14 d or maintained under normal growth conditions for 14 d. A and C, Control growth conditions; B and D, treated with UV-B. WT, wild type; 4-2A-5, 3-2C-5, and 1-4C-8, transgenic lipase-suppressed lines. Means ± se for n = 8 are shown.