Growth and phenolic constituents’ production of UKMR-2 roselle in response to soil media

Abstract

Plant phenolic content frequently varies in response to the changes in the environment and genetic factors. However, studies on the response of phenolic contents when cultivating under different soil media is still scarce. The present study investigates the phenolic constituents’ production and growth quality of roselle var. UKMR-2 in response to different soil media formulation ratio of topsoil, organic matter and sand. The UKMR-2 calyx extract was also analysed for total phenolic (TPC), total anthocyanin (TAC), antioxidant activity (in IC50) and evaluated based on HPLC-PDA. SM1 (2:1:1 v/v) soil media ratio may produce better growth, higher percentage yield and phenolic constituents’ for UKMR-2 cultivation. The HPLC-PDA showed the presence of delphinidin-3-O-sambubioside and cyanidin-3-O-sambubioside.