In order for our plants to produce light, there has to be something inside of the cells to generate the light first. Light in bioluminescence is generated by a reaction between luciferase and luciferin. The way to start this is to put an inverter that can turn on a protein in the absence of light. This ensures that the plants will only glow at night. The protein activated by that inverter will then produce luciferase, which in turn reacts with existing luciferin in the cell. This reaction is what we observe as the glow from a plant. The protein that is switched on to produce luciferase is referred to as adenylazyne
"BL Web: Chemistry." BL Web: Chemistry. Web. 22 Feb. 2016. <http://biolum.eemb.ucsb.edu/chem/>.