Fig. 3
Ratio of quantum yield of photosystem II (FV/FM and ΦPS-II), photochemical quenching (qP) and non-photochemical quenching (NPQ) in PT-plants vs. T-plants. 1 day, 2 days and 3 days after triggering in LTC- and STC primed and 20 min dark acclimated plants 0 min, 60 s and 240 s after the on-set of actinic light with 3-fold higher light intensity than growth light intensity. The crude data are standardized to the values in control plants (C). The data were analyzed by ANOVA (Tukey’s test; p < 0.05, n = 5–6). Significant differences to unprimed plants are labeled with an asterisk