Figure 1

Photosynthetic characteristic values for Isatis indigotica in all treatments. The values shown are the mean ± SD, n = 3. Asterisks (*) indicate a significant difference at the P ≤ 0.05 level.
Photosynthetic characteristic values for Isatis indigotica in all treatments. The values shown are the mean ± SD, n = 3. Asterisks (*) indicate a significant difference at the P ≤ 0.05 level.