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qP (A), NPQ (B), and ETR (C) measured at a PPFD of 335 μmol photon m-2 s-1 from M. crystallinum grown under combined red- and blue-LED lightings for 21 days. Each bar is the mean of 20 measurements of four different leaves from four different plants. Values are means ± standard errors. Means with different letters are statistically different (P < 0.05; n = 20) as determined by Tukey’s multiple comparison test.
