Chloroplast photorelocation movements in rpt2 and nch1 mutant plants. (A–D) Analysis of chloroplast photorelocation movements through the measurement of leaf transmittance changes. (A and C) After a dark treatment for 10 min, the samples were sequentially irradiated with continuous blue light at 3, 20, and 50 µmol⋅m–2⋅s–1 for 60, 40, and 40 min, indicated by white, light blue, and blue arrows, respectively. The light was turned off after 150 min (black arrow). Data are presented as means of three independent experiments, and the error bars indicate SEs. (B and D) Changes in leaf transmittance rates during the 2–6 min after changes in the light fluence rates (3, 20, and 50 µmol⋅m–2⋅s–1 or dark) are indicated as averages of transmittance changes for 1 min. Data are presented as means of three independent experiments and the error bars indicate SEs.