Rice BiP3 regulates immunity mediated by the PRRs XA3 and XA21 but not immunity mediated by the NB-LRR protein,Pi5 |
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| Authors: | Chang-Jin Park Min-Young Song Chi-Yeol Kim Jong-Seong Jeon Pamela C. Ronald |
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| Affiliation: | 1. Department of Plant Pathology and the Genome Center, University of California Davis, Davis, CA 95616, USA;2. Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Republic of Korea;3. Department of Bioresources Engineering, Sejong University, Seoul 143-747, Republic of Korea |
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| Abstract: | Plant innate immunity is mediated by pattern recognition receptors (PRRs) and intracellular NB-LRR (nucleotide-binding domain and leucine-rich repeat) proteins. Overexpression of the endoplasmic reticulum (ER) chaperone, luminal-binding protein 3 (BiP3) compromises resistance to Xanthomonas oryzae pv. oryzae (Xoo) mediated by the rice PRR XA21 [12]. Here we show that BiP3 overexpression also compromises resistance mediated by rice XA3, a PRR that provides broad-spectrum resistance to Xoo. In contrast, BiP3 overexpression has no effect on resistance mediated by rice Pi5, an NB-LRR protein that confers resistance to the fungal pathogen Magnaporthe oryzae (M. oryzae). Our results suggest that rice BiP3 regulates membrane-resident PRR-mediated immunity. |
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| Keywords: | ER, endoplasmic reticulum BiP3, luminal-binding protein 3 BRI1, brassinosteroid-insensitive 1 EFR, elongation factor Tu receptor FLS2, flagellin sensitive 2 HSP70, heat shock protein 70 M. oryzae, Magnaporthe oryzae NB-LRR, nucleotide-binding domain and leucine-rich repeat non-RD, non-arginine-aspartate PRR, pattern recognition receptor XA21, Xanthomonas resistance 21 receptor Xoo, Xanthomonas oryzae pv. oryzae |
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