LRR Receptor-like Protein in Rapeseed Confers Resistance to Infection via a Conserved NEP2 Peptide.

is one of the most extensively cultivated oilseed crops in China, but its yield is significantly impacted by stem rot caused by . Receptor-like proteins (RLPs) and receptor-like kinases (RLKs) play essential roles in plant-pathogen interactions; however, their regulatory mechanisms remain largely unknown in . In this study, we investigated the function of the leucine-rich repeat receptor-like protein RLP-G13-1 in immunity. Previous observations indicated that plants expressing RLP-G13-1 exhibited enhanced resistance to . We hypothesized that RLP-G13-1 mediates pathogen recognition and immune signaling. To test this, we employed mitogen-activated protein kinase (MAPK) activity assays, transgenic overexpression analyses, and pathogen infection assays. Our results demonstrated that RLP-G13-1 recognizes the conserved necrosis- and ethylene-inducing peptide nlp24 derived from , triggering MAPK cascades and subsequent immune responses. Furthermore, protein interaction studies revealed that RLP-G13-1 physically interacts with the receptor-like kinase SOBIR1, which is essential for full antifungal defense activation. These results elucidate the molecular basis of -mediated immunity, providing insights into improving disease resistance in oilseed crops.