Fig. 4
Correlations between photo-inhibition % to qE (panels A and C) and qI (panels C and D) in 6-month (panels A and B) and 2.4-year seedlings (panels C and D) of M. oiwakensis irradiated under 50, 100, 300, 500, 1,000, 1,500, and 2,000 μmol m−2 s−1 PPFD at 25 °C for 60 min. Each symbol represents the average of 5 leaves from one plant, and 5 plants were randomly selected from each light treatment. Each ChlF index was calculated using different seedling leaf data (n = 7) from model validation datasets. The determination coefficient (r.2) and significance of the regression are shown (*, **, ***, ****p < 0.05, 0.01, 0.001, 0.0001)