Figure 2. Enhanced GFP expression by Rep provision in trans using Agrobacterium-mediated infiltration. Wild type Arabidopsis (cv. Columbia) leaf samples were observed at 1 and 3 DAI for GFP fluorescence under UV light in microscope. Leaf samples were also observed under white light (18 milliseconds white light) as a control (data not shown). Exposure to UV light was one sec for 1 DAI, 2.3 sec for 3 DAI leaf samples.