Developing Light‐Emitting Plants (LEPs) with SrAl₂O₄: Eu²⁺, Dy³⁺ by Using Pressure Infiltration, Optimal Conditions for Glowing and Plant Stress Response

Developing light-emitting plants (LEPs) using SrAl₂O₄ has been working for the past few years because SrAl₂O₄ is a phosphorescent material with long-lasting and bright glowing properties. The six plant species (Episcia cupreata, Tabebuia argentea, Syngonium hybrid, Mimusops elengi, Schefflera arboricola, and Pilea cadierei) were infused with SrAl₂O₄, which has a particle size of 2.7 µm. The E. cupreata exhibited the highest phosphorescence (a relative phosphorescence value of 36.93) compared to other plant species. The optimal pressure to infuse SrAl₂O₄ into the plant is 7 × 10⁴ N/m² exposed for 60 min while 17.5 g/L SrAl₂O₄ is the best concentration. After infusion, the plants did not show physical abnormalities. However, the amount of MDA and antioxidants in plants was increased. Based on metabolomics analysis, SrAl₂O₄ might stress plants, but plants might be able to respond by producing antioxidant compounds. Therefore, using SrAl₂O₄ to LEPs did not kill the plants and provided high light output.