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Changes in F v/F m (A), qI (B), and qE (C) under chilling treatment in tomato plants. Plants grown at 25 °C in a greenhouse were exposed to 4 °C in the chambers for 0, 3, 6, 12, and 24h in the light (200 μmol m−2 s−1). Plants were dark adapted for 30min before measurement. The values are represented as means ±SD of three independent experiments (*P<0.05). Two-month-old grown plants were used.
