Possibility to Apply Strontium Aluminate to Produce Light-Emitting Plants: Efficiency and Safety

Light-emitting plants (LEPs) provides light in areas without electricity. The phosphorescent compound was used as a lighting material for LEP development. However, using the phosphorescent compound for LEPs development required optimization and phytotoxicity evaluation. Strontium aluminate (SrAl₂O₄) is a phosphorescent compound that can glow for a long time and is easily recharged by visible light. In this study, using SrAl₂O₄ to develop LEPs was evaluated. Additionally, plant stress under SrAl₂O₄ was investigated. Metabolomic analysis can explain the possible mechanism of plants’ stress under SrAl₂O₄. After, injecting 3 mL of 5 % (w/v) SrAl₂O₄ products 1, 2, and 3 into the stem of Ipomoea aquatica, the result showed that SrAl₂O₄ products 2 and 3 caused oxidative stress. The metabolomic analysis also indicated that I. aquatica responded to SrAl₂O₄ product 1 by increasing pipecolic acid and salicylic acid, while I. aquatica injected with SrAl₂O₄ products 2 and 3 showed a decrease in salicylic acid around 0.005 and 0.061-fold, respectively, compared to control plants. and an excess accumulation of MDA around 10.00–12.00 μmol g⁻¹ FW. A 15 % concentration of SrAl₂O₄ can be used for LEPs development, enabling photoemission 18-fold for 50 min. SrAl₂O₄ product 1 has the potential to be a material for LEPs.