Arabidopsis thaliana
Leaves of six week-old Arabidopsis Columbia (Col-0) wild type grown at 24*C and 70% humidity under an 8-hour-light/16-hour-dark cycle and infiltrated with the avirulent bacterium Pseudomonas syringae pv tomato, strain DC3000 expressing avrRps4 on plasmid pV316-1A (avrRPS4, avirulent, AVR) were harvested 12 hour-post-infiltration (12hpi).