CYP20-3 relays the OPDA signal in wound-dependent up-regulation of sulfur assimilation and adjustment of redox homeostasis. (A–C) Levels of soluble reduced nonprotein thiols (A), GSH (B), and GSH/GSSG ratios (C) in wounded WT (Col-0) and mutant (cyp20-3, dde2-2, opr3, and coi1-1) plants (mean ± SD; n = 3). (D) The levels of thiols in WT (Col-0) and cyp20-3 plants at various times after exogenous application of OPDA, JA, methyl (+)-7-iso-jasmonate (MeJA), or SA (mean ± SD; n = 3).