Essential oils of the Sextonia rubra (Mez ) van der Werff (Lauraceae)

Abstract

RESUMOos óleos essenciais das folhas e galhos de Sextonia rubra foram obtidos por hidrodestilação e analisados por cromatografia em fase gasosa com detectores de ionização de chama e espectrometria de massas. o a-pineno (21,7%), b-pineno (15,4%), a-copaeno (12,5%) e o germacreno D (12,1%) foram identificados como constituintes majoritários no óleo essencial das folhas. no óleo essencial dos galhos foram identificados como constituintes majoritários o a-copaeno (22,9%), b-selineno (7,9%) e o b-elemeno (7,2%). A composição química destes óleos essenciais está sendo relatada pela primeira vez neste trabalho. PALAVRAS-CHAVE: Amazônia, pineno, copaeno, cariofileno, louro gamela. Essential oils of the Sextonia rubra (Mez ) van der Werff (Lauraceae). ABSTRACTThe essential oils of the leaves and branches of Sextonia rubra were obtained by hydrodistillation and analyzed by gc-FiD and gc-MS. in the leaves were identified as the major constituents a-pinene (21.7%), b-pinene (15.4%), a-copaene (12.5%) and germacrene D (12.1%). in the branches essential oil, a-copaene (22.9%), b-selinene (7.9%) and b-elemene (7.2%) were identified as the most abundant constituents. This paper describes for the first time the composition of these essential oils.

Composition of antifungal volatile organic compounds in Sextonia rubra fruit by molecular networks

“…Despite the anti-fungal activity observed against T. rubrum, the hydrolate did not show any cytotoxic activity against the MRC-5 cell line at relative concentrations of 10%, 5%, 1% (Table S3). By comparing the current scientific literature with our study, the EOs composition of S. rubra (obtained from: bark, branches, fruit, heartwood, leaves, seeds, stem and twigs) is dominated by β-caryophyllene and eucalyptol which are detected in the EO and hydrolate prepared from different organs of S. rubra [32,41]. Lauraceae's EO are characterized by a high abundance in hydrocarbons and oxygenated sesquiterpenoids, which is consistent with the relative intensities of the molecular families detected in the fruit hydrolate (Table S1).…”

“…The monoterpenes common to the hydrolate, dried fruit, branches and leaves of S. rubra are αpinene and camphene [32]. Sesquiterpenes common to the hydrolate, dried fruit, branches and leaves are α-copaene, β-caryophyllene, α-muurolene, δcadinene and α-calamenene [32]. In general, the molecular family most represented in the EO or hydrolates of the different tissues of S. rubra corresponds mainly to the sesquiterpenes with the exception of leaves.…”

“…On the other hand, a previous study carried out on essential oils (EO) of S. rubra leaves led to the identification of 44.6% monoterpenes, 3.2% oxygenated monoterpenes and 47.7% sesquiterpenoids. The EO of branches was made up of 1.2% monoterpenes, 66.8% sesquiterpenes and 26.7% sesquiterpenoids (relative areas) [32]. The monoterpenes common to the hydrolate, dried fruit, branches and leaves of S. rubra are αpinene and camphene [32].…”

“…The EO of branches was made up of 1.2% monoterpenes, 66.8% sesquiterpenes and 26.7% sesquiterpenoids (relative areas) [32]. The monoterpenes common to the hydrolate, dried fruit, branches and leaves of S. rubra are αpinene and camphene [32]. Sesquiterpenes common to the hydrolate, dried fruit, branches and leaves are α-copaene, β-caryophyllene, α-muurolene, δcadinene and α-calamenene [32].…”