Argonaute 15 regulates immunity of potato to filamentous pathogens through transposon-derived small RNAs
StAGO15 binds transposon-derived small RNAs to regulate potato immunity, with deletion of a 21-nt MITE sequence restoring resistance to pathogens.
- Why it matters: Understanding how potato plants defend against filamentous pathogens is crucial for crop protection, especially as resistance mechanisms involve complex RNA pathways that are not fully understood.
- What they did: Researchers analyzed small RNAs associated with StAGO15 during Phytophthora infestans infection, using deep sequencing and bioinformatics to identify transposon-derived sRNAs targeting potato immune genes.
- The result: They found that deleting a specific 21-nt sequence from a MITE transposon disrupted a small RNA that suppresses resistance, thereby restoring immunity and revealing a novel regulatory role of transposon-derived sRNAs in plant defense.