Although host targets for effectors from filamentous fungal
pathogens are relatively less reported, increasing evidence implies
that these pathogens also use similar strategies exploited by bacterial
pathogens to abrogate the host defense functions. Effectors
Ecp6 and Slp1 are required for full virulence of leaf mold fungus
Cladosporium fulvum and rice blast fungus Magnaporthe oryzae,
respectively. Both Ecp6 and Slp1 compete with receptors CEBiP and
CERK1 for chitin binding to block PTI responses [52,53]. M. oryzea
effector AvrPiz-t targets host RING E3 ubiquitin ligase APIP6 to
suppress PTI and enhance virulence [54]. The corn smut fungal
pathogen Ustilago maydis secretes the apoplastic effector Pep1 that
directly targets the apoplastic peroxidase POX12 to suppress ROS
burst, a typical PTI response [55]