Plantasia

There have been attempts before to encourage plants to glow in the dark. This involved introducing bacterial genes, carrying luciferins,  to create bioluminescence but this process was generally toxic to the plants. A new technology has been now described in which genes from a bioluminescent fungus are introduced to plants (https://www.theguardian.com/science/2020/apr/27/scientists-create-glowing-plants-using-mushroom-genes). These are tolerated by the plant as they act upon naturally-occurring caffeic acid in their hosts. The intention is, not only to produce weirdly glowing house plants as a novelty, but to trace some naturally-occurring processes in the plants per se. Leaves generally show a reduction in light emission as they age, whereas its intensity increases when they are munched upon by herbivores. The greatest degree of bioluminescence appears to come from flowers.