Fig. 1.

Temperature response in white light varies in different growth conditions. Hypocotyl length measurements of Col-0 and cry1 seedlings in four growth schemes: A, 4-d-old seedlings grown in 100 μmol m⁻² s⁻¹ white light in either 21 °C or 27 °C; B, 4-d-old seedlings grown in 40 μmol m⁻² s⁻¹ white light in either 21 °C or 27 °C; C, 4-d-old seedlings grown in 10 μmol m⁻² s⁻¹ white light in either 21 °C or 27 °C; D, seedlings were grown in 100 μmol m⁻² s⁻¹ white light at 21 °C for 4 days and then either transferred to 27 °C or remained at 21 °C for 4 days before measurements. The hypocotyl response to warm temperatures was measured as the percentage increase in hypocotyl length between 21 °C and 27 °C. The percentages of hypocotyl increases (mean ± SD) at 27 °C are labeled above the columns and represented by the magenta and blue bars for Col-0 and cry1, respectively. Error bars for the hypocotyl length represent SD (n > 30), errors for the percentage increase represent SD of three to six biological replicates. The underlying source data of the hypocotyl measurements are provided in the Source Data file