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Changes in green color intensity of leaf disks cut out of 24-day-old pea plants grown from the control (C), hydroprimed (H), and hydroprimed with an aqueous solution of 50 μM melatonin (H-MEL50) or 200 μM melatonin (H-MEL200) seeds. Photographs were taken after 48 h of disks incubation in 75 μM PQ solution. The content of leaf pigments with statistical analysis at this time point (48 h) is presented in Figure 3 as dark gray bars.
