PPA1 and infection: A global gene expression profiling using Affymetrix microarrays was performed in Arabidopsis wrky33 mutant and 35S:WRKY33 overexpressing transgenic plants during infection with the necrotrophic fungus B. cinerea. Our aim was to (i) identify induced and repressed genes during B. cinerea pathogenesis; (ii) compare and link the DEGs after B. cinerea infection in presence of WRKY33 gene; and (iii) determine possible correlations of OPDA- and/or PPA1-regulated genes in response to B. cinerea in presence of TGA2/5/6 and WRKY33 as stress-associated genes.