Plays a role in defense responses triggered by jasmonate, ethylene and chitin. Expressed in rosette leaves, inflorescences, roots, leaf veins, carpel heads, and silique receptacles. By oligogalacturonides and the diterpenoid compound sclareol. Accumulates in response to mechanical wounding, chitin, methyl jasmonate (MeJA) and ethylene (ET) stimuli. Belongs to the leguminous lectin family.