Pacaldo, F.O. and Arradaza, C.C. 2021. Influence of plant growth regulators and UV light exposure on the formation and phenolic content of stevia rebaudiana bertoni callus: a preliminary study. Annals of Tropical Research. 43, 2 (Dec. 2021), 88–101. DOI:https://doi.org/10.32945/atr4328.2021.