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Phyton (Buenos Aires)

versión On-line ISSN 1851-5657


BARBOSA-FILHO, José Maria et al. Botanical study, phytochemistry and antimicrobial activity of Tabebuia aurea: (with 1 table & 1 figure). Phyton (B. Aires) [online]. 2004, vol.73, pp. 221-228. ISSN 1851-5657.

We report morphodiagnosis, and phytochemical and antimicrobial investigations of Tabebuia aurea. It was noted that the leaves are compostas with anomocytic stomata only on the lower side; the vascular system is concentric andthe mesophyll arrangement is dorsiventral. From the stem bark eight compounds were isolated, including: lapachol, 3,4',5-trihydroxy-7-methoxyflavone, b-sitosterol, betulinic acid, p-anisic acid, veratric acid, methyl cinnamate and ethyl p-hydroxy-cinnamate. Antimicrobial assays showed growth inhibition the of Gram positive and Gram negative bacteria, alcohol-acid bacterium and fungi.

Palabras clave : Tabebuia aurea; Bignoniaceae; Pharmacobotany; Lapachol; Chemical constituents; Antimicrobial activity.

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