Transcription factor involved in senescence, biotic and abiotic stress responses by modulating various phytohormones signaling pathways (By similarity). Interacts specifically with the W box (5'-(T)TGAC[CT]-3'), a frequently occurring elicitor-responsive cis-acting element (By similarity). Required for the resistance (R) gene Mi-1-mediated resistance to potato aphid (e.g. M.euphorbiae) and root-knot nematode (e.g. M.javanica) (PubMed:21898085). Induced in response to potato aphid (e.g. M.euphorbiae) infestation and root-knot nematode (e.g. M.javanica) inoculation. Up-regulated by salicylic acid (SA) and suppressed by methyl jasmonate (MeJA). Attenuated Mi-1-mediated resistance against potato aphid (e.g. M.euphorbiae) and root-knot nematode (e.g. M.javanica). Belongs to the WRKY group III family.