ORIGINAL RESEARCH article
Front. Chem.
Sec. Medicinal and Pharmaceutical Chemistry
Volume 13 - 2025 | doi: 10.3389/fchem.2025.1564404
Seasonal Changes in Aloysia oblanceolata Moldenke Essential Oil
Provisionally accepted
Paulo Vinicius Lima Santos1
Mateus Machado Lima1
Flavia Cristina A. Lucas2
JOYCE KELLY R. DA SILVA1
Jose Guilherme Soares Maia1
Pablo Luis Baia Figueiredo2*- 1Federal University of Pará, Belém, Pará, Brazil
- 2Universidade do Estado do Pará, Belem, Brazil
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Introduction: Aromatic plant species, essential oil producers, are used in traditional medicine due to the presence of bioactive compounds and their medicinal properties. This study aims to analyze the seasonal variation in Aloysia oblanceolata Moldenke essential oil's chemical composition in the Amazon region. Methods: The botanical material was one year monthly collected, the leaf essential oils were extracted by hydrodistillation, and GC-MS performed the chemical composition. The local climatic parameters of insolation, temperature, relative humidity, and precipitation were monitored. Multivariate statistical analysis was performed for hierarchical cluster analysis (HCA) and principal component analysis (PCA). Results and Discussion: The Aloysia oblanceolata essential oil (AoEO) yields ranged from 3.4% (December 2022 and February 2023) to 5.3% (August and September 2023), with an average of 4.3 ± 0.7%. The essential oil yield did not show a significant difference (p > 0.05) in the dry (4.7 ± 0.7%) and rainy (4.1 ± 0.6%) periods. GC and GC-MS identified thirty-eight chemical constituents in the essential oils, comprising approximately 94.6-97.1% of the oils analyzed in the seasonal study in the twelve-month period. The chemical constituents significantly correlated with climatic factors were trans-Pinocamphone, β-Pinene, and E-Caryophyllene. Group I was statistically different from Groups II and III regarding trans-Pinocarvyl acetate content (I = 7.0 ± 0.5%; II = 9.1 ± 0.3%; III = 8.2 ± 0.6%). Group II differed from the other groups in terms of β-pinene content (I = 4.3 ± 0.5%; II = 5.2 ± 0.3%; III = 1.6 ± 0.9%), trans-Pinocamphone (I = 13.1 ± 1.2%; II = 15.9 ± 0.4%; III = 12.5 ± 2.1%), and E-Caryophyllene content (I = 6.9 ± 0.7%; II = 4.7 ± 0.1%; III = 7.9 ± 1.6%). Furthermore, Group III differed from the other groups in terms of β-pinene content (I = 4.3 ± 0.5%; II = 5.2 ± 0.3%; III = 1.6 ± 0.9%). These results indicate changes in the seasonality of the chemical composition of the essential oil, possibly influenced by environmental factors and plant development.
Keywords: lavender, Verbenaceae, Mono and sesquiterpenes, essential oil composition, environmental factors
Received: 21 Jan 2025; Accepted: 03 Jun 2025.
Copyright: © 2025 Santos, Lima, Lucas, DA SILVA, Maia and Figueiredo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Pablo Luis Baia Figueiredo, Universidade do Estado do Pará, Belem, Brazil
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