Accumulation of salicylic acid and PR-1 gene transcripts in relation to the systemic acquired resistance (SAR) response induced by Pseudomonas syringae pv. tomato in Arabidopsis

The relationship between salicylic acid (SA) accumulation, PR-1 gene expression, and the degree of systemic acquired resistance (SAR) established in Arabidopsis plants has been determined by comparing the response of wild-type ecotype Columbia (Col-0) and two hypersensitive response (HR)-defective mutants (rps2-201 andrps2-101C ) during the SAR response induced by avirulent Pseudomonas syringae pv. tomato (Pst). Unlike wild-type Col-0 plants, …