Words similar to pr-
Example sentences for: pr-
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This conclusion is consistent with the original interpretation of PR gene expression data in eds5 and sid2 mutants that PR-1 and PR-5 are regulated differently [ 20 ] .
The template DNA used for making probes to detect expression of PR-1 , PR-5 and ROC1 (cyclophilin, used to normalize for RNA loading) were PR-1 and PR-5 cDNAs [ 14 ] and an Eco RI fragment of pCG22 [ 34 ] , respectively.
We have previously argued that PR-1 gene expression is controlled by two separate pathways [ 4 ] . One pathway results from SA accumulation and is dependent upon the NPR1 gene product.
The HR occurs in response to infection with avirulent bacteria at levels of inoculum that cause a large percentage of leaf cells to undergo programmed cell death (PCD) [ 8 ] . In contrast to results with avrRpt2, P. syringae bacteria carrying the avirulence genes avrB , avrRpm1 , avrPphB or avrRps4 elicit an exaggerated HR relative to that on the wild-type Columbia parent [ 5 7 ] . In a study in which bacteria carrying avrB were chosen as a representative member of this class, in further contrast to results with avrRpt2 , these bacteria were capable of eliciting SAR and PR-1 induction on ndr1-1 mutant plants [ 4 ] .
As the double mutant was susceptible to disease caused by this bacterial strain (data not shown), perhaps this residual gene induction was due to the virulence function of avrRpt2 [ 23 ] . Mutant npr1 plants have previously been shown to be impaired in induction of PR-1 but not PR-5 in response to virulent bacterial pathogen [ 19 ] .
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