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Science 26 October 2007:
Vol. 318. no. 5850, pp. 645 - 648
DOI: 10.1126/science.1144958

Reports

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{dagger}

Plant disease resistance (R) proteins recognize matching pathogen avirulence proteins. Alleles of the pepper R gene Bs3 mediate recognition of the Xanthomonas campestris pv. vesicatoria (Xcv) type III effector protein AvrBs3 and its deletion derivative AvrBs3{Delta}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{Delta}rep16, respectively. We found that recognition specificity resides in the Bs3 and Bs3-E promoters and is determined by binding of AvrBs3 or AvrBs3{Delta}rep16 to a defined promoter region. Our data suggest a recognition mechanism in which the Avr protein binds 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.

{dagger} To whom correspondence should be addressed. E-mail: lahaye{at}genetik.uni-halle.de

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Nuclear Trafficking During Plant Innate Immunity.
J. Liu and G. Coaker (2008)
Mol Plant 1, 411-422
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Promoters enter plant pathogen fray.
N. LeBrasseur (2007)
J. Cell Biol. 179, 570
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A Bacterial Effector Acts as a Plant Transcription Factor and Induces a Cell Size Regulator.
S. Kay, S. Hahn, E. Marois, G. Hause, and U. Bonas (2007)
Science 318, 648-651
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Science. ISSN 0036-8075 (print), 1095-9203 (online)