Figure 3.

Repair of 6-4 photoproducts in DNA from UV-irradiated plants. DNA extracted from irradiated plants was assayed for photoproducts as described in “Materials and Methods.” The plants studied were C10 wild-type (•), mutant uvh3 (□), complemented mutant uvh3 (▪), mutant uvh6-1 (▵), and complemented mutant uvh6-1 (▴). Each point represents the mean of four separate assays, and sds of the means are shown. The difference between the 24-h data points for uvh6-1 and the complemented uvh6-1 plants is statistically significant (P < 0.025).