Generally, a single avirulence gene ( in the bacterium ) corresponds to a single resistance gene ( in the plant host ), giving rise to the concept of a gene-for-gene response.
12.
Several experiments support this hypothesis, e . g . the Rpm1 gene in " Arabidopsis thaliana " is able to respond to two completely unrelated avirulence factors from " P . syringae ".
13.
The corresponding avirulence genes in the bacterium are avrB, avrA, avrC, and avrD . Thus, evolution, mutation, and cases of horizontal gene transfer can make it difficult to breed longterm resistance into soybean cultivars.
14.
Yeast two-hybrid studies of the tomato Pto / Prf / AvrPto interaction showed that the Avirulence protein, AvrPto, interacted directly with Pto despite Pto not having an LRR . This makes Pto the guardee protein, which is protected by the NBS-LRR protein Prf.
15.
Resistance to " Bremia lactucae " in " Lactuca serriola " is due to " Dm " genes, or single dominant genes . meaning that each resistance gene in the plant is associated with a specific gene in the pathogen, with avirulence being dominant to virulence.
16.
Presumably, if people were desperate enough to eschew the usual gatekeeping and rent-seeking of the medical cartel " ( that'll be the day ) ", they could sicken a bunch of monkeys with Ebola Reston, take their blood, run crowds of people through its dilute aerosol, and save most of them ( learning the limits of its avirulence in the process through a few fatalities, no doubt ).
