In vitro, possesses glutathione S-transferase activity toward 1-chloro-2,4-dinitrobenzene (CDNB) and benzyl isothiocyanate (BITC). May be involved in the conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles and have a detoxification role against certain herbicides. glutathione + RX = a halide anion + an S-substituted glutathione + H(+) Interacts with BAK1. Expressed in roots, stems, floral buds, mature flowers and leaves. By dehydration stress, wounding, H(2)O(2) and jasmonate, but not by growth regulators. No visible phenotype, maybe due to the possible redundancy with GSTF9. Belongs to the GST superfamily. Phi family.