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Functional Homologs of the Arabidopsis RPM1 Disease Resistance Gene in Bean and Pea
Jeffery L. Dangl, Claudia Ritter, Marjorie J. Gibbon, Luis A. J. Mur, John R. Wood, Sue Goss, John Mansfield, John D. Taylor and Alan Vivian
The Plant Cell
Vol. 4, No. 11 (Nov., 1992), pp. 1359-1369
Published by: American Society of Plant Biologists (ASPB)
Stable URL: http://www.jstor.org/stable/3869508
Page Count: 11
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We showed that a bacterial avirulence (avr) gene function, avrPpiA1, from the pea pathogen Pseudomonas syringae pv pisi, is recognized by some, but not all, genotypes of Arabidopsis. Thus, an avr gene functionally defined on a crop species is also an avr gene on Arabidopsis. The activity of avrPpiA1 on a series of Arabidopsis genotypes is identical to that of the avrRpm1 gene from P.s. pv maculicola previously defined using Arabidopsis. The two avr genes are homologous and encode nearly identical predicted products. Moreover, this conserved avr function is also recognized by some bean and pea cultivars in what has been shown to be a gene-for-gene manner. We further demonstrated that the Arabidopsis disease resistance locus, RPM1, conditioning resistance to avrRpm1, also conditions resistance to bacterial strains carrying avrPpiA1. Therefore, bean, pea, and conceivably other crop species contain functional and potentially molecular homologs of RPM1.
The Plant Cell © 1992 American Society of Plant Biologists (ASPB)