Figure 5. Responses of chlorophyll fluorescence parameters to light intensities; a. Group specific relationship between PSII operational quantum yield (Φ'_M) and growth light intensity normalized to photosynthetic light saturation point (E_K ^µm).

Other panels, comparison of averaged chlorophyll fluorescence paramaters obtained for each species grown under photosynthetic light limiting (Lim) or light saturating (Sat) conditions where b. is the quantum requirement, c. the non-photochemical quenching (NPQ) and d. the relative unquenched fluorescence parameter (UQF_Rel). * Significant difference between treatment obtained for each species using t-test (p<0.05). See Table 1 for species list.