Fig. 3

Fv’/Fm’ analysis among different Arabidopsis accessions under drought conditions. (A) Fv’/Fm’ values from Col-0, Ler-0, C24, and Kondara accessions in well-watered conditions. Letters, significant differences (n = 18 plants, three independent experiments, one-way ANOVA and Tukey’s HSD test, P < 0.01). (B) Single measurements of drought-treated plants before recovery irrigation. Redline, threshold estimated by a GLM with a training sample size of 50 measurements and validated in the remaining 10 measurements (1000 iterations); R, point biserial correlation coefficient (n = 60 plants, three independent experiments). (C) Adult plants from different Arabidopsis accessions submitted to a severe drought treatment before (upper) and after (lower) receiving a recovery irrigation. Labels, Fv’/Fm’ values