Repressor of jasmonate responses. By abscisic acid (ABA), and drought and salt stresses. Down-regulated by jasmonate and wounding. The jas domain (155-182) is required for interaction with COI1. Ubiquitinated. Targeted for degradation by the SCF(COI1) E3 ubiquitin ligase-proteasome pathway during jasmonate signaling. Belongs to the TIFY/JAZ family.