NDR1 , a Pathogen-Induced Component Required for Arabidopsis Disease Resistance

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Abstract
Plant disease resistance (R) genes confer an ability to resist infection by pathogens expressing specific corresponding avirulence genes. In Arabidopsis thaliana, resistance to both bacterial and fungal pathogens, mediated by several Rgene products, requires the NDR1 gene. Positional cloning was used to isolate NDR1, which encodes a 660–base pair open reading frame. The predicted 219–amino acid sequence suggests that NDR1 may be associated with a membrane. NDR1 expression is induced in response to pathogen challenge and may function to integrate various pathogen recognition signals.