Figure 6.

Differences in the OJIP kinetics between mesophyll and bundle sheath cells in response to zinc deficiency stress in soybean leaves (20-nm residue from chemicals and water) compared to control (340-nm Zn) for six weeks. Three areas of mesophyll and three veins were chosen from every leaf for quantification. Values represent means ± se from n ≥ 6 leaves per treatment. The measurement was done with the macroscopic system; the number of pixels averaged per curve varied according to the size of the morphological feature, but was generally in the range of dozens.