The brightly colored cactus that sits on top is actually a mutant variation of a standard cactus. In the wild, if a mutant pup is created, eventually it would detach from the parent plant and sadly die as it cannot photosynthesize. The reason it canâ€™t photosynthesize is because it has no chlorophyll (green pigments), which is essential in the photosynthesis process. So in order for a mutant pup to survive, we have to find some other means to give it nutrients. This is where the grafting comes in.