Identification of Bioactive Compounds and Antimicrobial Activity Test of Methanol Extracts of Leaves and Flowers of Various Tabebuya Species (Tabebuia spp.)

Abstract

Tabebuia species in South America have many functions as traditional medicines, while Tabebuia species in Indonesia are useful for making the air clean and becoming ornamental plants. The aim of this study was to determine the content of bioactive compounds and antimicrobial activity of methanol extracts of leaves and flowers of  various Tabebuia genus. The method to determine the content of bioactive compounds using GC-MS (Gas Chromatography-Mass Spectrometry) method while to determine antimicrobial activity using Kirby-Bauer method. Bioactive compounds found in all extracts were Siliconfett and Cyclotrisiloxane, hexamethyl. Methanol extract of T. aurea leaves at a concentration 6.25% had the highest mean ZOI against C. albicans. The methanol extract of T. rosea leaves at 100% concentration had the highest mean ZOI against E. coli. The methanol extract of T. aurea leaves at a concentration 25% has the highest mean ZOI against S. aureus.