Phytochemical composition and antibacterial activity of ethanol extract of Amorphophallus lanceolatus tuber (Araceae)

Abstract

Amorphophalus lanceolatus is a rare member belonged to Araceae family and is recorded as an endemic species of Binh Chau-Phuoc Buu Nature Reserve (Vietnam). The phytochemical composition and antimicrobial activity of A. lanceolatus have not been studied yet. In this study, we determined the phytochemical composition of ethanol extract of A. lanceolatus tuber using liquid chromatography-mass spectrometry (LC-MS) and evaluated the antibacterial activity of ethanol extract via disk diffusion test. We identified 12 compounds in ethanol extract of A. lanceolatus tuber, such as polyethylene glycol-diglycidyl ether, lycopersin, heptacosane, n-heneicosylcyclopentane, homalomenol F, maltitol, pyrinuron, octadecane, 2 (1 H) naphthalenone, 3,5,6,7,8,8a-hexahydro-4,8a-dimethyl-6-(1-methylethenyl), 2-methylfluoranthene, quinic acid, 1H-imidazole. Moreover, we proved that ethanol extract of A. lanceolatus tuber could inhibit the growth of B. cereus, E. coli, P. aeruginosa, S. enteritidis, S. typhimurium, and S. aureus.