Transcription factor that specifically binds AT-rich DNA sequences related to the nuclear matrix attachment regions (MARs) (By similarity). Negatively regulates plant innate immunity (PTI) to pathogens through the down-regulation of the PAMP-triggered NHO1 and FRK1 expression (PubMed:20738724). The PPC domain mediates interactions between AHL proteins. Overexpression of AHL20 results in a decreased expression of NHO1 and FRK1 and in an enhanced susceptibility to virulent strain DC3000.