A Rice Receptor-like Protein Negatively Regulates Rice Resistance to Southern Rice Black-Streaked Dwarf Virus Infection
2023
Fengmin Wang | Weiqi Song | Chaorui Huang | Zhongyan Wei | Yanjun Li | Jianping Chen | Hehong Zhang | Zongtao Sun
Plants rely on various receptor-like proteins and receptor-like kinases to recognize and defend against invading pathogens. However, research on the role of receptor-like proteins in plant antiviral defense, particularly in rice–virus interactions, is limited. In this study, we identified a receptor-like gene, <i>OsBAP1</i>, which was significantly induced upon infection with southern rice black-streaked dwarf virus (SRBSDV) infection. A viral inoculation assay showed that the OsBAP1 knockout mutant exhibited enhanced resistance to SRBSDV infection, indicating that OsBAP1 plays a negatively regulated role in rice resistance to viral infection. Transcriptome analysis revealed that the genes involved in plant–pathogen interactions, plant hormone signal transduction, oxidation–reduction reactions, and protein phosphorylation pathways were significantly enriched in <i>OsBAP1</i> mutant plants (<i>osbap1-cas</i>). Quantitative real-time PCR (RT-qPCR) analysis further demonstrated that some defense-related genes were significantly induced during SRBSDV infection in <i>osbap1-cas</i> mutants. Our findings provide new insights into the role of receptor-like proteins in plant immune signaling pathways, and demonstrate that OsBAP1 negatively regulates rice resistance to SRBSDV infection.
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