Seasonal variation of essential oil of germplasm of Lippia origanoides Kunth. (Verbenaceae)

Abstract

The biological activities attributed to Lippia origanoidesKunth. vary according to the chemical composition of its essential oil, which can be related to weather factors. The aim of this research was the seasonal study of the essential oil chemical composition taken from L. origanoidesaccessions maintained in germplasm bank in vivo. The essential oil was extracted by hydrodistillation in Clevenger apparatus and identification of the components was done by GC-MS. We have identified 15 compounds of which carvacrol, p-cymene, thymol and methyl-ether-thymol were majority throughout the year for most accessions. In three accessions showed fluctuations in the production of the major compound during the year like the α-pinene, limonene and borneol. The essential oil showed variation in chemical composition throughout the year, the major compound in most of the accessions during the year is carvacrol. In some accessions, there are alterations of the majority component.

Quimiotipos de Lippia origanoides Kunth na Amazonia e sua importância farmacológica: uma revisão

“…Os metabólitos secundários, como os fenólicos, terpênicos, entre outros, são compostos envolvidos no mecanismo de defesa das plantas, atuando na resistência a fatores ambientais, de forma a aumentar sua capacidade de sobrevivência (LIANG; MCKINNON; RANKIN, 2020). A produção desses metabólitos varia de acordo com a região, o ciclo circadiano, a sazonalidade e os estresses bióticos e abióticos (FERRAZ et al, 2018;JANAÍNA S. PIRES et al, 2017;MONTEIRO, Maria Vivina Barros et al, 2007;PEREIRA, Evaristo Jose Pires et al, 2018;UNIVERSIDADE FEDERAL DE MINA GERAIS et al, 2022).…”