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Plant Pathogen Recognition Mediated by Promoter Activation of the Pepper Bs3 Resistance Gene
Patrick Römer,Simone Hahn,Tina Jordan,*Tina Strauß,Ulla Bonas,Thomas Lahaye
Plant disease resistance (R) proteins recognize matching pathogenavirulence proteins. Alleles of the pepper R gene Bs3 mediaterecognition of the Xanthomonas campestris pv. vesicatoria (Xcv)type III effector protein AvrBs3 and its deletion derivativeAvrBs3rep16. Pepper Bs3 and its allelic variant Bs3-E encodeflavin monooxygenases with a previously unknown structure andare transcriptionally activated by the Xcv effector proteinsAvrBs3 and AvrBs3rep16, respectively. We found that recognitionspecificity resides in the Bs3 and Bs3-E promoters and is determinedby binding of AvrBs3 or AvrBs3rep16 to a defined promoter region.Our data suggest a recognition mechanism in which the Avr proteinbinds and activates the promoter of the cognate R gene.
Institute of Biology, Department of Genetics, Martin-Luther-University Halle-Wittenberg, D-06099 Halle (Saale), Germany.
* Present address: Institute of Plant Biology, University of Zürich,Zollikerstrasse 107, 8008 Zürich, Switzerland.
To whom correspondence should be addressed. E-mail: lahaye{at}genetik.uni-halle.de
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rep16. Pepper Bs3 and its allelic variant Bs3-E encode flavin monooxygenases with a previously unknown structure and are transcriptionally activated by the Xcv effector proteins AvrBs3 and AvrBs3
To whom correspondence should be addressed. E-mail: 
