Figure 4.

Monitoring of light emissions by low-light video image analysis in a single transgenic Arabidopsis plant during the course of a compatible or an incompatible interaction. Two leaves from each plant were inoculated with either P.s. DC3000 or P.s. DC3000 (AvrRpm1) and at each time point the plant was taken from the growth chamber, sprayed with 1 mm luciferin, and immediately the photon collection was performed for 10 min. This process was repeated in the same plant at 0, 24, 48, and 72 h postinoculation with the bacteria. The left column of pictures shows a standard photograph of the single plant used in each experiment. Top, Two plants derived from the same P69B::LUC transgenic line. Bottom, Two plants derived from the same P69C::LUC transgenic line. The experiments were repeated with plants from at least three different transgenic lines for each construct and in all cases render similar results.