How to Design Flowers

Nick Desnoyer is a plant biologist designing flowers that do not exist in nature, most notably Paintunia: a petunia engineered to act as a living canvas. Paintunia lines carry inducible genes that switch on pigment biosynthesis when treated with small molecules like dexamethasone; touched regions produce color after roughly 16 hours. The plan is to implement three separate inducible pathways to yield cyan, magenta, and yellow pigments so users can "paint" flowers in CMY blends. Examples discussed include an engineered petunia from a two‑decade‑old paper, a true yellow line called Bees Knees (carotenoids), and hybrid crosses such as Black Mamba that combine pigments to produce near‑black effects. The project treats color as subtractive (CMYK) rather than additive (RGB), and anticipates novel interactions between pigment classes that normally do not co‑occur, like anthocyanins and betalains.

Design work pairs practical tools - breeding, genetic engineering, induced mutations, occasional pathogen tools, and deep literature searches - to make traits unreachable by conventional crosses. Desnoyer frames flower design as sculpting (organ placement, number, shape) plus painting (pigment identity and spatial patterning), and he has already converted Arabidopsis into pink "micro‑roses." He emphasizes breeding’s accessibility and history (10,000 years, teosinte→corn) while using bioengineering as a set of new levers to create unique forms. His ultimate goal is a mutant botanical garden of weird, instructive flowers that force viewers to look more closely at nature.