The transcriptome of Arabidopsis thaliana during systemic acquired resistance

Maleck, Klaus; Levine, Aaron; Eulgem, Thomas; Morgan, Allen; Schmid, Jürg; Lawton, Kay A.; Dangl, Jeffery L.; Dietrich, Robert A.
December 2000
Nature Genetics;Dec2000, Vol. 26 Issue 4, p403
Academic Journal
Infected plants undergo transcriptional reprogramming during initiation of both local defence and systemic acquired resistance (SAR). We monitored gene-expression changes in Arabidopsis thaliana under 14 different SAR-inducing or SAR-repressing conditions using a DNA microarray representing approximately 25-30% of all A. thaliana genes. We derived groups of genes with common regulation patterns, or regulons. The regulon containing PR-1,a reliable marker gene for SAR in A. thaliana, contains known PR genes and novel genes likely to function during SAR and disease resistance. We identified a common promoter element in genes of this regulon that binds members of a plant-specific transcription factor family. Our results extend expression profiling to definition of regulatory networks and gene discovery in plants.


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