The Rice XA21 Ectodomain Fused to the Arabidopsis EFR Cytoplasmic Domain Confers Resistance to Xanthomonas oryzae pv. oryzae
The Rice XA21 Ectodomain Fused to the Arabidopsis EFR Cytoplasmic Domain Confers Resistance to Xanthomonas oryzae pv. oryzae
Summary Rice (Oryza sativa) plants expressing the XA21 cell surface receptor kinase are resistant to Xanthomonas oryzae pv.oryzae (Xoo) infection. We previously demonstrated that expressing a chimeric protein containing the EFR (ELONGATION FACTOR Tu RECEPTOR) ectodomain and the XA21 endodomain (EFR:XA21) in rice does not confer robust resistance to Xoo.To test if the XA21 ectodomain is required for Xoo resistance, we produced transgenic rice lines expressing a chimeric protein consisting of the XA21 ectodomain and EFR endodomain (XA21:EFR) and inoculated these lines with Xoo. We also tested if the XA21:EFR rice plants respond to a synthetic sulfated 21 amino acid derivative (RaxX21-sY) derived from the activator of XA21-mediated immunity, RaxX.We found that five independently transformed XA21:EFR rice lines displayed resistance to Xoo as measured by lesion length analysis, and showed that five lines express markers of the XA21 defense response (generation of reactive oxygen species and defense response gene expression) after treatment with RaxX21-sY.Our results indicate that expression of the XA21:EFR chimeric receptor in rice confers resistance to Xoo. These results suggest that the endodomain of the EFR and XA21 immune receptors are interchangeable and the XA21 ectodomain is the key determinant conferring robust resistance to Xoo.
Ronald Pamela、Nalyvayko Alina、Schwessinger Benjamin、Caddell Daniel、Liu Furong、Thomas Nicholas、Oksenberg Nir、Nguyen Yen
Department of Plant Pathology and the Genome Center, University of CaliforniaDepartment of Plant Pathology and the Genome Center, University of CaliforniaDepartment of Plant Pathology and the Genome Center, University of California||The Australian National University, Research School of BiologyDepartment of Plant Pathology and the Genome Center, University of CaliforniaDepartment of Plant Pathology and the Genome Center, University of CaliforniaDepartment of Plant Pathology and the Genome Center, University of California||Department of Plant Pathology and Microbiology, University of CaliforniaDepartment of Plant Pathology and the Genome Center, University of CaliforniaDepartment of Plant Pathology and the Genome Center, University of California
分子生物学植物学遗传学
Ronald Pamela,Nalyvayko Alina,Schwessinger Benjamin,Caddell Daniel,Liu Furong,Thomas Nicholas,Oksenberg Nir,Nguyen Yen.The Rice XA21 Ectodomain Fused to the Arabidopsis EFR Cytoplasmic Domain Confers Resistance to Xanthomonas oryzae pv. oryzae[EB/OL].(2025-03-28)[2025-04-26].https://www.biorxiv.org/content/10.1101/119925.点此复制
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