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Variation in light response curves of rETR in four Arabidopsis accessions grown at a low growth irradiance (growth in LL), grown in LL for 24 d followed by a high growth irradiance for 4 d (response to HL), and grown in HL for 24 d (growth in HL). The low growth irradiance level is 100 µmol m−2 s−1, and the high growth irradiance level is 600 µmol m−2 s−1. Error bars indicate se; n = 3.
