Interference between Two Specific Pathogen Recognition Events Mediated by Distinct Plant Disease Resistance Genes.
Open Access
- 1 February 1996
- journal article
- Published by Oxford University Press (OUP) in Plant Cell
- Vol. 8 (2), 251-257
- https://doi.org/10.1105/tpc.8.2.251
Abstract
We demonstrate that the interaction of the avirulence gene avrRpt2 and the cognate resistance gene RPS2 interferes with the interaction of avrRpm1-RPM1 in Arabidopsis. Interference is mediated outside of the bacterial pathogen Pseudomonas syringae, presumably at the level of recognition of avr-dependent signals, yet does not require the wild-type RPS2 product. A numerical excess of P. syringae expressing avrRpm1 can overcome this interference in mixed inoculations. The interference of avrRpt2-RPS2 engagement with RPM1-dependent functions is mirrored by transcriptional activation of genes preferentially expressed during RPM1- or RPS2-mediated disease resistance reactions. This demonstration of interference between two plant disease resistance genes suggests that their products compete for a common element(s) in a signal transduction pathway leading to disease resistance.Keywords
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