Key points are not available for this paper at this time.
Xinnian Dong, Michael Mindrinos, Keith R. Davis, Frederick M. Ausubel, Induction of Arabidopsis Defense Genes by Virulent and Avirulent Pseudomonas syringae Strains and by a Cloned Avirulence Gene, The Plant Cell, Vol. 3, No. 1 (Jan., 1991), pp. 61-72
Dong et al. (Tue,) studied this question.