Low temperature (77K) fluorescence emission spectra.

<p>The excitation wavelength was set at 436 nm and slit width was set at 5 nm for both excitation and detection. Spectra were normalized to area below the curve from 665 to 735 nm. Two prominent chlorophyll fluorescence emission peaks were observed for GV – a peak at 680 nm from PSII and peak at 710 nm from PSI; the peak at 680 nm was found to be much higher than that at 710 nm. However, OR contained no comparable peaks to GV. Dashed line represents GV and solid line represents OR.