SOD in isolated plastids.

A) Fluorescence emission spectra measured at 77 K for plastids isolated from leaves treated in the same way as for SOD identification; excitation: 440 nm; greening time–indicated in the legend; EFD–plastids isolated from leaves that were etiolated for 6 days and then illuminated with a flash of white light; plastid isolation was begun directly after the flash or indicated greening times and lasted c.a. 30 min; they were isolated under a dim green light; B) The distribution of the relative activity of SOD isoforms in plastids isolated from M leaf fragments; the data represents the mean ± SD (n = 3, * p < 0.05; ** p < 0.01).