909 
fluorescence (a.u.) fluorescence (a.u.) fluorescence (a.u.) fluorescence (a.u.) fluorescence (a.u.) 
400 440 480 520 560 440 480 520 560 440 480 520 560 600 
wavelength (nm) wavelength (nm) wavelength (nm) 
Fig. 1. Decay-associated-spectra of sugar beet leaves and mesophyll. 
average lifetime (ns)