This knowledge would also be applicable in the solar power industry.
The basic science is credible: for lurkers, C3 and C4 metabolic pathways refer to the number of carbons stored in molecules which are intermediaries to the creation of sugar (and, thus, starch) from carbon-dioxide. C4 plants can absorb carbon dioxide at night, for photosynthesis during the day. This is important because the same pores (”stoma”) used to gain carbon dioxide allow water to escape, so absorbing carbon at night means opening stomata (pl. of stoma) only during the cooler, moister times.
Of course, simply tinkering with the carbon-fixing metabolic pathway doesn’t turn a day-breathing plant into a night-breathing one. There are many anatomical adaptations to go with it, since you can’t exactly tell a plant, “Hey, it’s day time, but hold your breath; you can do all that breathing at night because I just genetically engineered a new metabolic process for you!”