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Variation in Volatile Leaf Oils of Eleven Eucalyptus Species Harvested from Korbous Arboreta (Tunisia)
Author(s) -
Elaissi Ameur,
Medini Hanène,
Larbi Khouja Mohamed,
Simmonds Monique,
Lynene Fréderic,
Farhat Farhat,
Chemli Rachid,
HarzallahSkhiri Fethia
Publication year - 2010
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.200900381
Subject(s) - chemotype , botany , eucalyptus , alpha pinene , essential oil , myrtaceae , eucalyptus camaldulensis , genus , chemistry , horticulture , biology , limonene
Hydrodistillation of the dried leaves of eleven species of the genus Eucalyptus L ' Hér ., i.e., E. astringens Maiden , E. camaldulensis Dehnh ., E. diversifolia Bonpl ., E. falcata Turcz ., E. ficifolia F. Muell ., E. gomphocephala DC., E. lehmannii ( Schauer ) Benth ., E. maculata Hook ., E. platypus Hook ., E. polyanthemos Schauer, and E. rudis Endl ., harvested from Korbous arboreta (region of Nabeul, northeast of Tunisia) in April 2006, afforded essential oils in yields varying from 0.1±0.1 to 3.8±0.1%, dependent on the species. E. astringens and E. ficifolia showed the highest and the lowest mean percentage of essential oil amongst all the species examined, respectively. Analysis by GC ( RI ) and GC/MS allowed the identification of 138 components, representing 74.0 to 99.1% of the total oil. The contents of the different samples varied according to the species. The main components were 1,8‐cineole, followed by trans ‐pinocarveol ( 1 ), spathulenol ( 2 ), α ‐pinene, p ‐cymene, ( E , E )‐farnesol, cryptone, globulol ( 3 ), β‐ phellandrene, α ‐terpineol, viridiflorol, and α ‐eudesmol. The principal‐component and the hierarchical‐cluster analyses separated the eleven Eucalyptus leaf essential oils into seven groups, each constituting a chemotype.