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The Chemical Diversity of Eucalyptus spp. Essential Oils from Plants Grown in Brazil
Author(s) -
Filomeno Claudinei Andrade,
Barbosa Luiz Claudio Almeida,
Pereira José Luiz,
Pinheiro Antônio Lelis,
Fidêncio Paulo Henrique,
Montanari Ricardo Marques
Publication year - 2016
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201600097
Subject(s) - eucalyptus camaldulensis , eucalyptus , eucalyptol , eucalyptus tereticornis , p cymene , essential oil , chemistry , chemical composition , botany , horticulture , principal component analysis , food science , biology , mathematics , organic chemistry , ruthenium , catalysis , statistics
A chemical analysis of essential oils from leaves of eleven Eucalyptus L’ Herit taxa, grown in Viçosa, Brazil were carried out. The identification and quantification of essential oils constituents were carried out by GC ‐ FID and GC / MS . The leaves of E. camaldulensis and E. tereticornis presented the highest oil content (3.00% and 2.30% respectively). In total, 48 compounds were identified in the oils. Higher levels of 1,8‐cineole were found for oils produced by E. microcorys (66.2%), E. urophylla (65.4%) and E. camaldulensis (44.8%) and the hybrid E. urophylla × E. grandis (33.0%). The oil from E. saligna was composed mainly by α ‐pinene (92.3%). High concentrations of α ‐phellandrene were found in the oils produced by E. camaldulensis (22.9%) and E. robusta (36.6%). The oils from E. grandis and E. pilularis were rich in p‐ cymene (59.5% and 46.0%, respectively). Samples with high levels of 1,8‐cineole were classified by principal component analysis ( PCA ) using the accumulated variance of the PC 1 and PC 2 into major groups. Other samples were grouped based on their content of p ‐cymene; α ‐phellandrene, α ‐ and β ‐eudesmol; α ‐pinene. The PCA allowed the separation and classification of samples with the highest levels of different compounds, a procedure that can help in the decision of grouping oils from different sources for industrial use.