Figure 1.

Physiological Performance of Arabidopsis Plants during (De-)acclimation to High Light, Heat, and Cold

(A–F) 14-day-old plants grown under standard growth conditions were exposed to high light (HL), heat, and cold for 4 days (acclimation period, highlighted by gray background), followed by a return to standard growth conditions for 4 days (de-acclimation period). Fresh weight (A), total protein content (B), anthocyanin content (C), chlorophyll (Chl a + b) level (D), effective quantum yield of photosystem II (Ф_II) (E), and non-photochemical quenching (NPQ) (F) were recorded daily. Values correspond to the mean ± SD of n ≥ 4 independent experiments. ∗∗p < 0.01; ∗p < 0.05 (Student’s t test). See Table S1 for standard deviations and statistics. See also Figure S1.