Abstract
Xanthomonas oryzae pathovar oryzae (Xoo) causes bacterial blight (BB) of rice (Oryza sativa) and is one of the major constraints for sustainable production of this staple crop worldwide. The use of resistant rice cultivars is the most economical and effective method to control this disease. Here we review the tremendous progress that has been made in elucidating molecular mechanisms of resistance against BB in the past two decades, with a focus on recent results. Of the 34 named Xoo-resistance conferring genes (Xa genes) that have been identified thus far, scientists have cloned 6 of them. These diverse loci include a resistance protein (XA1), a confirmed pattern-recognition receptor (XA21) and another gene encoding a protein with a similar structure (XA3/XA26), two promoter mutants (Xa27 and xa13), and a missense mutation in a host transcription factor (xa5). Some of the corresponding effectors and pathogen-associated molecular patterns from Xoo have also been identified. Leveraging these and other molecular data have led to the identification of numerous other molecular components that function in rice defence response. In addition to providing critical insight towards crop improvement via transgenesis or marker-assisted selection, these advances have propelled the rice-Xoo molecular interaction to the status of a model system for understanding fundamental aspects of plant disease resistance.
Original language | English |
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Title of host publication | Advances in Botanical Research |
Publisher | Academic Press Inc. |
Pages | 51-87 |
Number of pages | 37 |
DOIs | |
Publication status | Published - 2011 |
Publication series
Name | Advances in Botanical Research |
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Volume | 60 |
ISSN (Print) | 0065-2296 |
Bibliographical note
Funding Information:This work was supported by grants from the Next-Generation BioGreen 21 Program; Rural Development Administration of the Korean Ministry of Food, Agriculture, Forestry, and Fisheries (PJ008114022011 and PJ008156012011 to J.-S. J., and PJ0080982011 to S.-W. L.); and the Mid-Career Researcher Program (2010-0026679 to J.-S. J.) and the World Class University program (R33-2008-000-10168-0 to J.-S. J.) of the Korean Ministry of Education, Science, and Technology. L. E. B. is supported by the NSF-EPSCOR Bioenergy Program in Oklahoma, USA (NSF Grant No. EPS-0814361).
Keywords
- Bacterial blight disease
- Disease
- Molecular mechanism
- Resistance gene
- Rice
- Xanthomonas oryzae pathovar oryzae