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Breakpoint of plant transpiration to reduced soil water availability (TRbreak). Data were gravimetrically collected in Experiment 1 (A) and 2 (B) and daily plant transpiration was plotted against FTSW curves and subjected to segmented regression (n = 10 in A and n = 12 in B). Data were analyzed with one-way ANOVA and different letters represent significant differences according to Fisher’s test.
