AI Insight
Researchers have discovered that the rice blast fungus Magnaporthe oryzae produces a long non-coding RNA (lncRNA) that enters rice plant cells and acts as a molecular decoy. This fungal lncRNA sequesters a rice microRNA that normally suppresses PKR1, a protein that inhibits plant immunity. By neutralizing this microRNA, the pathogen effectively removes the brakes on PKR1, weakening the plant's immune response and enabling successful infection.
Why it matters
This finding reveals a previously unknown RNA-based strategy that pathogens use to manipulate host defense systems, opening new avenues for developing disease-resistant crops. Understanding this mechanism could lead to targeted interventions that disrupt pathogen lncRNAs or protect beneficial host microRNAs, potentially reducing crop losses from fungal infections like rice blast disease.
Nature, Published online: 20 May 2026; doi:10.1038/s41586-026-10572-x
A fungal long non-coding RNA from Magnaporthe oryzae translocates into rice cells to sequester a host microRNA that normally represses PKR1, a negative immunity regulator, thereby facilitating infection and revealing a widespread RNA-based pathogen–host interaction mechanism.
Source: A pathogen lncRNA secreted into rice sequesters a host miRNA for virulence