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Published in: Journal of Natural Medicines 1/2022

01-01-2022 | Natural Resource Letter

Essential oils from Melia azedarach L. (Meliaceae) leaves: chemical variability upon environmental factors

Authors: Godfried Dougnon, Michiho Ito

Published in: Journal of Natural Medicines | Issue 1/2022

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Abstract

The chemical composition of the essential oils extracted from the leaves of Melia azedarach L. collected monthly from July 2019 to June 2020 was examined via gas chromatography (GC) and gas chromatography–mass spectrometry (GC–MS) techniques. Analysis of the essential oils identified about 17 compounds representing more than 85% of the oil. Oil yields were higher in the months of June and August, and the primary compounds identified were β-caryophyllene (3.50–63.41%), benzaldehyde (3.50–55.98%), and azulene (1.27–19.05%). A correlation analysis was performed to determine the relationship between yields and climatic conditions, and between constituent concentration and temperature and precipitation values during the study period. As per our findings, although not significant, a positive correlation was determined between yield and climatic parameters. However, the oil components were categorized into four groups based on their correlation with temperature and precipitation indices. Among the major components of the essential oils, only azulene and β-caryophyllene exhibited a negative correlation with both precipitation and temperature. The results show substantial differences in the chemical composition of M. azedarach essential oils and provide further insight into the phytochemical constituents that are sensitive to climate fluctuations. Furthermore, it provides an indication of the optimal time that the plant produces the important mono- and sesquiterpene components and the biological significance of their regulation.

Graphic abstract

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Metadata
Title
Essential oils from Melia azedarach L. (Meliaceae) leaves: chemical variability upon environmental factors
Authors
Godfried Dougnon
Michiho Ito
Publication date
01-01-2022
Publisher
Springer Singapore
Published in
Journal of Natural Medicines / Issue 1/2022
Print ISSN: 1340-3443
Electronic ISSN: 1861-0293
DOI
https://doi.org/10.1007/s11418-021-01579-x

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