Advanced Monochromatic Red Laser Diodes Show Superior Performance to LEDs in Enhancing Photosynthesis and Plant Growth

A recent study published in Frontiers in Plant Science explores the potential of laser diodes (LDs) for enhancing plant productivity in indoor horticulture, contrasting their effects with those of traditional light-emitting diodes (LEDs). Conducted by researchers from The University of Tokyo, Stanley Electric Co., and National Chung Hsing University, the study assessed gas exchange in tobacco plants under various light sources, identifying LD 660 as notably more effective than LED 664 in promoting photosynthesis and growth. Key findings revealed that plants exposed to LD 660 demonstrated increased photochemical efficiency and starch accumulation, as well as greater shoot dry weight and leaf area compared to those under LED 664. This research highlights the advantages of LDs, including their energy efficiency and capability for remote illumination, suggesting they could significantly benefit indoor plant production.