Fig. 5
From: Functional characterization and comparison of lycopene epsilon-cyclase genes in Nicotiana tabacum
Effect of high light stress on photosynthetic parameters of detached leaves of Ntε-LCY mutant plants. a Effect of a 2-h exposure to normal light or high light stress on the leaf maximum photochemical efficiency of PSII (Fv/Fm) in Ntε-LCY mutant plants. b Non-photochemical quenching of chlorophyll fluorescence (NPQ) in detached leaves of Ntε-LCY mutant plants exposed to high light stress for 2 h. The photon flux density (PAR) of normal light was 80 μmoL m−2 s−1, and that of high light was 440 μmoL m−2 s−1. Data are presented as the mean ± SEM of four independent experiments (n = 4, *p < 0.05, **p < 0.01; two-way ANOVA, Tukey’s post-hoc test)