Difference between revisions of "AY986492"
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===Evolution=== | ===Evolution=== | ||
Induction of Xa27 occurs only in the immediate vicinity of infected tissue, whereas ectopic expression of Xa27 resulted in resistance to otherwise compatible strains of the pathogen. Thus Xa27 specificity towards incompatible pathogens involves the differential expression of the R gene in the presence of the AvrXa27 effector. | Induction of Xa27 occurs only in the immediate vicinity of infected tissue, whereas ectopic expression of Xa27 resulted in resistance to otherwise compatible strains of the pathogen. Thus Xa27 specificity towards incompatible pathogens involves the differential expression of the R gene in the presence of the AvrXa27 effector. | ||
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| + | ==Labs working on this gene== | ||
| + | 1. Temasek Life Sciences Laboratory, National University of Singapore, Singapore, 117604, Singapore | ||
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| + | 2. Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China | ||
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| + | 2. Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China | ||
Revision as of 07:20, 24 May 2014
Function
Resistant and susceptible alleles of Xa27 encode identical proteins. However, expression of only the resistant allele occurs when a rice plant is challenged by bacteria harbouring avrXa27, whose product is a nuclear localized type-III effector. Induction of Xa27 occurs only in the immediate vicinity of infected tissue, whereas ectopic expression of Xa27 resulted in resistance to otherwise compatible strains of the pathogen. Thus Xa27 specificity towards incompatible pathogens involves the differential expression of the R gene in the presence of the AvrXa27 effector.
Expression
The Xa27(t) locus conferred a high level of resistance to 27 strains and moderate resistance to three strains. Resistance of the Xa27(t) gene was developmentally regulated in IRBB27 and showed semidominant or a dosage effect in the cv. CO39 genetic background. As a prelude to cloning Xa27(t), a molecular mapping strategy was employed with a large mapping population consisting of 3,875 gametes
Evolution
Induction of Xa27 occurs only in the immediate vicinity of infected tissue, whereas ectopic expression of Xa27 resulted in resistance to otherwise compatible strains of the pathogen. Thus Xa27 specificity towards incompatible pathogens involves the differential expression of the R gene in the presence of the AvrXa27 effector.
Labs working on this gene
1. Temasek Life Sciences Laboratory, National University of Singapore, Singapore, 117604, Singapore
2. Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China
2. Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China
