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Intensity of chlorophyll a fluorescence in the OJIP test including F0 (A), FJ (B), FI (C), FP (D), Fv [E; (Fm − F0)] and Fv/Fm (F) from the fluorescence transient exhibited by leaves of rose plants grown under different light spectra [blue (B), red (R), white (W) and red and blue (RB)] under 250 (black bars) and 1500 (grey bars) µmol m−2 s−1 PPFD. Bars represent means ± SD.
