Transcription factor involved in senescence, biotic and abiotic stress responses by modulating various phytohormones signaling pathways (PubMed:14742872, PubMed:16623907, PubMed:17310369, PubMed:28576847). Interacts specifically with the W box (5'-(T)TGAC[CT]-3'), a frequently occurring elicitor-responsive cis-acting element (By similarity). Binds to the 5'-[CT]GACTTTT-3' motif in promoters of target genes to induce their expression (PubMed:24104863). Plays an important but not indispensable role in jasmonate and salicylic acid signaling (PubMed:18713432). Regulates positively the salicylic acid (SA)-mediated signal pathway, but negatively the jasmonic acid (JA)-mediated signal pathway, thus determining the balance between these mutually antagonistic pathways (PubMed:14742872, PubMed:16623907, PubMed:18713432, PubMed:28837631). Together with WRKY46, WRKY53 and WRKY54, prevents defense response to the necrotrophic pathogens P.carotovorum and B.cinerea, but promotes defense responses (including SA-induced pathogenesis-related (PR) genes expression) against biotrophic/hemibiotrophic SA-monitored pathogens (e.g. P.syringae, E.carotovora subsp. carotovora SCC3193 and E.cichoracearum), probably by regulating negatively the JA/ET and positively the SA signaling pathways (PubMed:28837631, PubMed:16623907, PubMed:22325892). Contributes to the suppression of jasmonic acid (MeJA)-induced expression of JA-responsive genes (e.g. PDF1.2) (PubMed:22325892, PubMed:16623907). Promotes susceptibility to JA-monitored pathogens (e.g. A.brassicicola), probably by facilitating SA-controlled suppression of JA-mediated defense. Represses the biosynthesis of the phytoalexin camalexin and indol-3-ylmethyl glucosinolate (IGS) (PubMed:16623907). Represses both SA and JA/ethylene (ET) mediated defense marker genes expression (PubMed:17310369). Negative regulator of SA biosynthesis (PubMed:28837631). Negative regulator of EDS1-dependent defense against E.amylovora (PubMed:22316300). Required for RPP4-mediated disease resistance and basal defense against H.parasitica, probably via late up-regulation (LURP) of resistance genes (e.g. CML10/CaBP22 and LURP1) (PubMed:17313163). Probably involved in defense responses toward insects (e.g. P.xylostella and B.brassicae) (PubMed:25339349). Together with WRKY54, negative regulator of developmental senescence, probably via the regulation of several senescence-associated markers genes (PubMed:17310369, PubMed:22268143). Together with WRKY46 and WRKY54, promotes brassinosteroid (BR)-regulated plant growth but prevent drought response by modulating gene expression (PubMed:28576847). In collaboration with WRKY54, prevents stomatal closure and, consequently, osmotic stress tolerance (PubMed:23815736). Regulates rhizobacterium B.cereus AR156-induced systemic resistance (ISR) to P.syringae pv. tomato DC3000 (PubMed:26433201). Interacts with WRKY30 (PubMed:22268143). Binds to BZR2/BES1 to cooperatively regulate the expression of target genes (PubMed:28576847). Expressed in leaves and flowers. In flowers, first observed in both stigmatic papillae and the flower abscission zone, later confined to the abscission zone (PubMed:17310369). In leaves, level increases gradually up to the point of leaf senescence (PubMed:17310369, PubMed:22268143). Regulated by MYB44 (PubMed:23067202, PubMed:23603962). Basal expression levels require the presence of endogeneous salicylic acid (SA) (PubMed:14742872, PubMed:17310369). Induced by reactive oxygen species (ROS) (PubMed:22268143). Early but transient accumulation after osmotic stress (e.g. polyethylene glycol, PEG) (PubMed:23815736). Induced by SA; early induction is NPR1-independent, but full-scale induction is NPR1-dependent (PubMed:14742872, PubMed:22325892, PubMed:22268143, PubMed:26433201). Up-regulated by benzothiadiazole (BTH) (PubMed:26433201). Repressed by jasmonic acid (MeJA) by both COI1-dependent and COI1-independent pathways (PubMed:14742872, PubMed:18713432). Triggered by the pathogenic compatible bacteria E.carotovora subsp. carotovora SCC3193 (PubMed:14742872). Induced by P.syringae pv. tomato DC3000 (PubMed:17965588, PubMed:22325892). Stimulated by ATX1 (PubMed:17965588). Up-regulated by E.amylovora (PubMed:22316300). Accumulates during leaf and flower senescence (PubMed:17310369). Induced expression upon simultaneous feeding by caterpillars (e.g. P.xylostella) and aphids (e.g. B.brassicae) at a low density, but lower levels in plants induced with both caterpillars and a high aphid density (PubMed:25339349). Responsive to rhizobacterium B.cereus AR156 in leaves (PubMed:26433201). Regulated by ATX1 by epigenetic histone H3 methylation (PubMed:18375658). Phosphorylated and destabilized by ASK7/BIN2. Slightly reduced in size (PubMed:17310369). In wrky70-1 mutant, not alteration of responses to both JA and SA (PubMed:18713432). Activation of jasmonic acid (JA)-responsive genes in a COI1-dependent manner (PubMed:14742872). Enhanced disease susceptibility to the necrotrophic bacterial pathogen E.carotovora subsp. carotovora SCC3193. Impaired resistance to the salicylic acid (SA)-monitored fungal pathogen E.cichoracearum. Enhanced JA-induced accumulation of anthocyanins (PubMed:16623907). Compromised basal defense and reduced RPP4-dependent late up-regulation (LURP) of resistance genes (e.g. CML10/CaBP22 and LURP1) upon infection by H.parasitica. Reduced INA- (2,6-dichloroisonicotinic acid, SA analog) mediated resistance toward H.parasitica (PubMed:17313163). Promotion of both developmentally and dark-induced leaf senescence associated with abnormal expression levels of several senescence-associated markers genes (PubMed:17310369, PubMed:22268143). The double mutant wrky54 wrky70 exhibits stronger leaf senescence symptoms (PubMed:22268143). Almost no symptoms in response to E.amylovora (PubMed:22316300). Increased susceptibility to P.syringae associated with reduced PR1 induction in double mutants wrky46 wrky70 and wrky46 wrky53, and triple mutant wrky46 wrky70 wrky53. In these mutants, higher induction of PDF1.2 upon jasmonic acid (MeJA) treatment (PubMed:22325892). The double mutant wrky54 wrky70 exhibits an enhanced tolerance to osmotic stress associated with improved water retention and enhanced stomatal closure as well as salicylic acid (SA) accumulation, but a reduced induction of osmotic stress-responsive genes and reduced accumulation of the osmoprotectant proline (PubMed:23815736). Unstressed wrky54 wrky70 double mutant exhibits increased levels of SA, moderate accumulation of hydrogen peroxide H(2)O(2) and up-regulated expression of both SA and JA/ethylene (ET) responsive defense related genes; thus promoting cell wall fortification and consequently enhancing resistance to necrotrophic pathogens (e.g. P.carotovorum and B.cinerea) associated with reduced cell death, but is not sufficient to trigger hypersensitive reaction (HR)-like cell death and resistance to biotrophic/hemibiotrophic pathogens (e.g. P.syringae), characterized by reduced amount of callose (PubMed:28837631). Reduced rhizobacterium B.cereus AR156-induced systemic resistance (ISR) to P.syringae pv. tomato DC3000 associated with reduced (SA)-mediated signal pathway. Plants lacking both WRKY11 and WRKY70 are totally impaired in B.cereus AR156-mediated ISR (PubMed:26433201). The triple mutant wrky46 wrky54 wrky70 has defects in brassinosteroid (BR)-regulated growth and is more tolerant to drought stress (PubMed:28576847). Belongs to the WRKY group III family.