We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
The rice XA21 ectodomain fused to the Arabidopsis EFR cytoplasmicdomain confers resistance to Xanthomonas oryzaepv.oryzae.
- Authors
Thomas, Nicholas C.; Oksenberg, Nir; Furong Liu; Caddell, Daniel; Nalyvayko, Alina; Nguyen, Yen; Schwessinger, Benjamin; Ronald, Pamela C.
- Abstract
Rice (Oryza sativa) plants expressing the XA21 cell-surface receptor kinase are resistant to Xanthomonas oryzaepv.oryzae (Xoo)infection. We previously demonstrated that expressing a chimeric protein containing the ELONGATION FACTOR Tu RECEPTOR (EFR) 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) of 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 share characteristic 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 toXoo.
- Subjects
PYRICULARIA oryzae; ELONGATION factors (Biochemistry); XANTHOMONAS; AMINO acid derivatives; CHIMERIC proteins; TRANSGENIC rice; RICE; HYBRID rice
- Publication
PeerJ, 2019, p1
- ISSN
2167-8359
- Publication type
Article
- DOI
10.7717/peerj.4456