Figure 6.

UV-B treatment is not lethal to maize plants. A, Photosynthetic CO₂ fixation before UV-B treatment (9 am), after 8 h of UV-B (5 pm), and 16 h posttreatment (next day 9 am) compared to matched, untreated plants. Total chlorophylls, chlorophyll a and b (B), and total proteins and carotenoids (C) after 8 h UV-B (8 h UV-B) and 16 h posttreatment (16 h recovery) compared to untreated controls. Measurements are the average of six adult leaves from six different plants. Statistical significance was analyzed using a paired-t test with P < 0.05; differences from the control are marked with an asterisk.