engleski

Essential oil from leaf-buds of service tree, Sorbus domestica L.

Service tree (Sorbus domestica L., Rosaceae family) is rare tree of gardens and forests. The fruit of service tree is nutritive and contains biological active compounds. In early spring leaf-buds of service tree are large, sticky and have characteristic fragrance. This material contains many waxes and semi volatile compounds which can diminish rapidity of essential oil distillation and its yield. The buds were collected in early spring (March). Essential oil was isolated from fresh leaf-buds by simultaneous superheated steam distillation-solvent extraction (modified Likens Nickerson method, home made apparatus) for 3 h. Superheated steam (ca. 105 0C) was generated by heating 20% NaCl aqueous solution to boiling (3). The yield was 0.03% w/w. Isolated oil was analysed by using GC and GC/MS. The essential oil mainly contains phenylpropane derivatives and related compounds (benzaldehyde, benzyl alcohol, 2-phenylethanol, 4-hydroxy-3-methylacetophenone), sesquiterpene compounds (α -longipinene, longicyclene, longifolene, longiborneol) and aliphatic compounds (6-methyl-3, 5-heptadiene-2-on, E-2-decenal, 2, 4-decadienal, octadecenal, pentanoic, hexanoic, heptanoic and octanoic acid). Benzaldehyde is characteristic compound found in many species of Rosaceae family in form of glycoconjugated compounds such as amygdalin, prunasin. The main compounds of the oil were benzaldehyde (56%), longicyclene (11.5%), α -longipinene (4.8%), 6-methyl-3, 5-heptadiene-2-on (3.6%), longifolene (2.4%), pentanoic acid (1.9%), longiborneol (1.7%). Hexanoic, heptanoic and octanoic acids, benzyl alcohol, 2-phenylethanol, E-2-decenal, 2, 4-decadienal, octadecenal, 4-methyl-5, 6-dihydro-2H-pyran-2-on, 2, 3-dihydrobenzofuran, 4-hydroxy-3-methylacetophenone and other compounds that were identified in smaller amount. Leaf-buds essential oil of service tree has not been yet investigated.

Sorbus domestica L.; essential oil; GC-MS

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