Variação intraespecífica na composição e teor do óleo essencial de Lippia thymoides

• Autor(a) principal: Baier Krepsky, Patrícia
• Data de Publicação: 2021
• Outros Autores: Suellen Caires Neves, Dilaine, Nunes Santana, Gabriela
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Fitos
• Texto Completo: https://revistafitos.far.fiocruz.br/index.php/revista-fitos/article/view/1062
• topic: Cromatografia gasosa; Quantificação; Óleo essencial; Terpenos; Composição química. Metabólitos secundários.

Lippia thymoides is an aromatic and medicinal plant native to the Brazilian Caatinga and Cerrado. Some research on pharmacological activities and chemical composition has been carried out. However scientific knowledge about chemical variation is inceptive. Therefore, this research is aimed to evaluate factors that interfere in essential oil content of leaves and flowers, and its chemical composition. Essential oil was quantified by means of hydrodistillation in a Clevenger apparatus. Essential oil obtained was evaluated by gas chromatography coupled to mass spectrometry. The variables were: different individuals (six), hour of collection (7, 12 and 17 hours), recovery after pruning and water stress on field. The hour of collection, pruning and drying, did not influence the essential oil content. It was detected only interindividual variation. Analysis of the chemical composition of essential oil revealed thymol, methyl-thymol and p-cymene as major components. Some variations were observed on essential oil composition, but the chromatographic fingerprint remained constant. Therefore the collection can be performed any hour of the day, and a new one can teke place after the recovery of plants without compromising oil content and chemical composition.