Response to single versus additive stress: violin plots. Seedlings were germinated on ½ MS in the light (light), in the dark (dark), or in the dark with −0.4 MPa water stress (darkW). (A–F) Violin plots depict a direct comparison of organ lengths or the hypocotyl/root ratio between the wild type and (A) phyAphyBcry1cry2; (B) pyrpyl1pyl2pyl4; (C) bin2-3bil1bil2; (D) club-2; (E) trs120-4; (F) echidna in the same experiment and on the same PEG plates. The same datasets as shown in Fig. 5, B–E and Fig. S9, B–E were used. Decision phenotypes of bin2-3bil1bil2 and trs120-4 mutants are highlighted as follows: bin2-3bil1bil2 showed an opposite root adaptation (red asterisks) and no hypocotyl/root adaptation (non-significant [n.s.] in red) to the multiple stress conditions of darkW. trappii null mutants, club-2 and trs120-4, had an attenuated, but significant etiolation response but failed to correctly adjust their hypocotyl length under darkW (red asterisks). Additionally, trs120-4 mutants showed no root and no hypocotyl/root ratio adaptation (n.s. in red) to darkW conditions. At least three experiments were performed for each line, and a representative one is shown here on the basis of RQ and P values. P values for decision phenotypes were computed with a two-tailed Student’s t test (*: P < 0.05; ***: P < 0.001) Related to Figs. 5 and S9.