Quantification of luciferase in luxCt transgenic lines. Equal cell numbers of WT and luxCt transgenic lines (luxCt, psbA-luxCt, rbcL-luxCt/rbcLwt, and rbcL-luxCt/rbcL-) were spotted on solid Tris-acetate-phosphate (TAP) media. The samples were treated with a decanal and visualized on a CCD camera for luminescence (middle panel) or photographed under reflective light (bottom panel). The mean values (n = 4) of CCD counts were reported as total counts per second per sample. CCD counts were acquired and the highest value set to 100%. Relative values were calculated as a percentage of the highest value. The mean values (n = 4) ± SE were presented (top panel).