Fig. 3.

Low-temperature (77 K) fluorescence spectra of G. theta cells grown under standard-light (SL) (30 µmol m⁻² s⁻¹), low-light (LL) (7.5 µmol m⁻² s⁻¹) or high-light (HL) (150 µmol m⁻² s⁻¹) conditions. Chlorophyll a was excited at 435 nm (a), and phycoerythrin PE545 was excited at 545 nm (b). Spectra were normalized to PSII fluorescence at 687 nm. The same number of cells was used for each measurement