Figure 4.
Induction and reduction of CPDs and (6-4) photoproducts in wild-type and uvi1 seedlings after UV-B exposure. A, Induction of CPDs. Five-day-old seedlings grown in the light were exposed to a single pulse of UV-B (0–3 kJ m−2) and the relative amounts of CPDs were measured by ELISA. C, Reduction of CPDs formed by a single pulse of UV-B (3 kJ m−2) when seedlings were irradiated under white light. E, Reduction of CPDs formed by a single pulse of UV-B (1 kJ m−2) when seedlings were incubated in the dark. B, D, and F, Corresponding results for (6-4) photoproducts. The results represent an average of at least two independent experimental values. Error bars are se.