Fig. 8

Chlorophyll fluorescence emission spectra (77 K) of S. alba thylakoids. Fluorescence was excited at 470 nm for thylakoids isolated from control (solid line), healthy 500 μg L⁻¹ of Tl (dashed line) and yellow 1000 μg L⁻¹ of Tl (dotted line) leaves (a). Fluorescence emission-difference spectra Tl treated-minus-control were calculated for H100 (b), H500 (c), G500 (d), Y500 (e), G1000 (f), Y1000 (g) - description of abbreviation on the Fig. 3 legend. The spectra were normalized to the area of 100 under the spectrum, and the difference spectra (B-G) were calculated for the respective excitation spectra. The presented spectra are representative of three independent experiments