Fig. 3. Composition of nonphotochemical quenching in qE, qZ + qT, and qI fractions of Eulophia dentata, Bletilla formosana, and Saccharum spontaneum. Measurements were made at 25°C under 50, 100, 300, 500, 800, 1,000; 1,500; and 2,000 μmol m–2 s–1 PPFD for 60 min and after a dark period for 30 min. Different letters indicate significant differences in Tukey's HSD analyses at eight illuminations (P<0.05). Each datum represents the mean of five leaves. qE – energy-dependent quenching; qI – photoinhibition quenching; qT – state transition quenching; qZ – zeaxanthin-dependent quenching.
