Essential Oils of New Lippia alba Genotypes Analyzed by Flow-Modulated Comprehensive Two-Dimensional Gas Chromatography (GC×GC) and Chemometric Analysis

Essential Oils of New Lippia alba Genotypes Analyzed by Flow-Modulated Comprehensive Two-Dimensional Gas Chromatography (GC×GC) and Chemometric Analysis

(Mill.) N. E. Br. (Verbenaceae) is an aromatic shrub whose essential oils have stood out as a promising source for application in several industrial fields. In this study, the essential oils chemical characterization of eight new genotypes was performed. The selected materials were collected from th...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Vol. 26; no. 8; p. 2332
Main Authors: Gimenes, Leila, Silva, Júlio César R Lopes, Facanali, Roselaine, Hantao, Leandro Wang, Siqueira, Walter José, Marques, Marcia Ortiz Mayo
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 16-04-2021
MDPI
Subjects:
Breeding
Caryophyllene
Caryophyllene oxide
Chemical composition
Chemical compounds
Chromatography
Cineole
comprehensive two-dimensional gas chromatography
Endangered & extinct species
Essential oils
flow-modulated
Gas chromatography
Genotype & phenotype
Genotypes
Geranial
Germacrene
Germplasm
Hydrocarbons
lemon balm
Linalool
Lippia alba
Mass spectrometry
Mass spectroscopy
Materials selection
Metabolites
Neral
Oils & fats
Principal components analysis
Sabinene
Statistical analysis
Two dimensional analysis
Two dimensional flow
Brazil
Lippia alba
lemon balm
comprehensive two-dimensional gas chromatography
flow-modulated
essential oils
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Summary:(Mill.) N. E. Br. (Verbenaceae) is an aromatic shrub whose essential oils have stood out as a promising source for application in several industrial fields. In this study, the essential oils chemical characterization of eight new genotypes was performed. The selected materials were collected from the Active Germplasm Bank of the Agronomic Institute and the essential oils were extracted by hydrodistillation. Flow-modulated comprehensive two-dimensional gas chromatography coupled to mass spectrometry (GC×GC-MS) was employed for chemical characterization and evaluation of possible co-eluted compounds. In addition, the chemical analyses were submitted to multivariate statistical analyses. From this investigation, 73 metabolites were identified in the essential oils of the genotypes, from which α-pinene, β-myrcene, 1,8-cineole, linalool, neral, geranial, and caryophyllene oxide were the most abundant compounds among the accessions. This is the first report disclosing α-pinene in higher amounts in (19.69%). In addition, sabinene, -verbenol, myrtenol, ( )-caryophyllene, α-guaiene, germacrene D, and α-bulnesene were also found in relevant quantities in some of the genotypes, and myrtenal and myrtenol could be well separated through the second dimension. Such results contributed to the understanding of the chemical composition of those new genotypes, being important to drive a future industrial applicability and studies in genetic breeding.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26082332