Plants are resistant to most pathogens due to a multilayered innate immunity. Pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) builds one of the first layers of plant immunity. Despite the importance of PTI for disease resistance of plants, little is known about the pathogen´s molecular patterns and corresponding plant pattern recognition receptors (PRR) that are involved in interaction of crop plants with their major pathogens (Saur and Hückelhoven, J. Plant Physiol., 2021). By using major pathogens of crops and Arabidopsis thaliana as a model, we attempt to identify PAMPs and PRRs that are of relevance for the interaction outcome of crop plants and fungal pathogens of major economic impact. For examples of our work see: Coleman et al. (2021) New Phytologist doi: 10.1111/nph.17122. or Yang & Steidele et al. (2023) Nat. Comm. doi.org/10.1038/s41467-023-39208-8 (cooperation with Andrea Gust at ZMBP Tübingen).