Figure 2. Schematic diagram of the Luciferase Complementation Assay (A) Select fully expanded young leaves of Nicotiana benthamiana (four-week old) for Agrobacterium injection, observe after 24-48 h (Bar=2 cm); (B) Cut the infiltrated tobacco leaves and put them into the petri dish (Bar=1 cm); (C) Use CCD imaging system to detect the luminescence of the complete tobacco leaves and captured the pictures; (D) Select infiltrated leaves for punch (Bar=1 cm); (E) Punch tobacco leaf discs of 0.6 cm in diameter from infiltrated leaf areas by a cork borer and place leaf discs in a 96-well plate containing 200 μL sterile water in each well; (F) Use luminometer to scan the fluorescence intensity of the tobacco leaves. The circles show the injection sites of Agrobacterium.