Effect of UV-B elicitation on spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production

Abstract Additional artificial ultraviolet-B irradiation (UV-B) is a substitute for the natural UV-B radiation, which believed to modulate antioxidants production in plants against abiotic stress. The present research was formulated by using an indoor chamber, capable of irradiating at single wavelength 315 nm on spearmint. In vitro destructive analysis revealed reduction accumulation chlorophyll and b as well carotenoids. However, elevated levels phenolic index total anthocyanins were recorded both 43.2 KJ/m 2 86.4 doses. TBARS assay carried out record lipid peroxidation spearmint likewise, enhanced secondary metabolites production, increased seen with successive UV–B A remarkable sugars, reducing sugars sucrose also noticed. vivo decrease estimated values increase flavanols. Overall leaf fluorescence performance improved under doses maximum quantum efficiency photosystem II. Decreases yield, plant height length internode observed however, number stems dose. results study not only provided clear indication potential modifying phytochemicals but opened room investigating various future studies their interaction towards UV-B. Graphical