The cpr5 mutant of Arabidopsis expresses both NPR1-dependent and NPR1-independent resistance.
Bowling SA, Clarke JD, Liu Y, Klessig DF, Dong X. Plant Cell. 1997 Sep;9(9):1573-84.
...... and reduced trichome development. The cpr5 plants were found to be constitutively resistant to two virulent pathogens, Pseudomonas syringae pv maculicola ES4326 and Peronospora parasitica Noco2; to have endogenous expression of the pathogenesis-related gene 1 (PR-1); and to have an elevated level of salicylic acid (SA). Lines homozygous for cpr5 and either the SA-degrading bacterial gene nahG or the SA-insensitive mutation npr1 do not express PR-1 or exhibit resistance to P. s. maculicola ......