Also, if you like cut a hole with a razorblade in the trunk of a plant, and the kill a bunch of glow bugs and rub their juice in the wound. Then like water the plant with 50/50 glow bug juice and water. Then stick electric diodes into the wet soil, and connect some to the plant at an in and out point at a distance in the plant, then hook up a car battery; it is possible to get the glow bug DNA into the plant. And who knows what would happen, but it could glow. You could also add genetics from a plant that glows.
Glowing isn't a guarantee, but it could get the Genetics in there.