The GFP and DsRed fluorescence imaging was performed by illuminating the PCPs under UV LED light (400 nm) and green LED light (530 nm), respectively. The fluorescence was observed and photographed through yellow (Roscolux 12: Straw for GFP) and red (Roscolux 19: Fire for DsRed) excitation filters with an Olympus digital camera (OLYMPUS PEN Lite E-PL3) and Zeiss Pancolar 50/1.8 lens. The pictures were taken 4 days after PCP infusion. The same procedure was used for GFP and DsRed fluorescence detection in Agrobacterium suspensions.
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