Chenopodium quinoa microgreens are a culinary product that, as well as other species, is rich in bioactive, health promoting compounds. The present paper shows that light spectrum alone can be used as a convenient tool for enhancing phenolic synthesis in quinoa plantlets. The methods used involved pot growth of quinoa plantlets and irradiation with a 16 : 8 photoperiod of either full spectrum (white) or a combination of blue:red:UV wavelengths and morphometric and biochemical assessments. Results shows that, while full spectrum light is more suitable for biomass accumulation, modulated light spectrum can be used for increases in the amount of phenolic compounds. Further optimization of light spectrum modulation can lead to economically higher value microgreens, with positive outcomes for both horticultural biotechnology but also for the consumer.
