Words similar to avirulent
Example sentences for: avirulent
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Induction of SAR has been reported to be dependent upon the NPR1 gene [ 9 10 11 ] . In these studies, neither SA/SA analogs nor avirulent bacteria were able to induce SAR on npr1 mutant plants.
These details are presented in a model of the signaling network for induction of SAR, PR-1 gene expression and PR-5 gene expression by avirulent P. syringae bacteria (Figure 4).
By the same sets of criteria described above for studying the difference between wild-type and actA infections, we examined whether there were any genes reproducibly induced by cytoplasmic bacteria (wild-type or actA ) but not by the avirulent organism ( prfA ). In this dataset, no genes passed these criteria during the first 4 hours of infection.
The sagA/pel mutant of isolate CS101 fails to express β-hemolysin, SpeB, SK or surface M and M-related proteins [ 4 ] . Based on prior studies from our laboratory [ 9 10 ] , we predicted that this isolate would be avirulent in the mouse skin air sac model.
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 ] .
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