Study on the characteristic curve of laser-induced delayed luminescence in leaves of Scindapsus

• Published in: Journal of optics (New Delhi) 2023-06, Vol.52 (2), p.908-914
• Main Authors: Jiang, Meili, Li, Chenhao, Tang, B. Qing, Gao, Peng, Wang, Jing, Yang, Yongdong, Zhang, Xiaochun, Liu, Yang
• Format: Article
• Language: English
• Subjects: Darkrooms; Decay; Delay time; Discussion; Irradiation; Lasers; Luminescence; Metabolites; Optical Devices; Optics; Parameters; Photonics; Photons; Photosynthesis; Physics; Physics and Astronomy; Physiology; Pulsed lasers; Room temperature; Stimulated emission; Wavelengths
• ISSN: 0972-8821; 0974-6900
• DOI: 10.1007/s12596-021-00743-6

At room temperature, we studied the delayed luminescence characteristic curves of the leaves of Scindapsus in darkroom and continuously irradiate at different wavelengths. The results show that the decay of stimulated emission photons induced by pulsed laser has a typical hyperbolic trend with the delay time, and the goodness of fitted curve can reach 99.9%. The initial photon intensity I (0) and decay time τ are closely related to the environment and physiological activities of plants. In the dark room, it was found that the initial intensity and decay time of the delayed luminescence curve for picked leaves decreased, while the potted leaves remained almost unchanged. The characteristic curve of laser-induced delayed luminescence accurately reflected the process and degree of plant wilting. For continuously irradiated by the laser wavelength of 520 nm and 400 nm, respectively, the change in curve parameters reflects the selective absorption of different light wavelengths. Compare the condition with having light and without, the metabolites of photosynthesis and respiration are different in plants, which leads to greatly changes in decay time. The characteristic curve of laser-induced delayed luminescence can be used as an important parameter to measure the physiological state of plants.