Constituents and Antibacterial Activity of the Essential Oils from the Leaves and Fruits of Pittosporum viridulum

摘要

The essential oils obtained by hydrodistillation of the fresh leaves and mature fruits of Pittosporum viridulum were analyzed by GC and GC/MS. Fifteen components comprising 85.4% of the leaf oil and twenty-six components comprising 94.5% of the fruit oil have been identified. The major components of the leaf oil were spathulenol (28.4%), caryophyllene oxide (17.6%), and alpha-cadinol (9.0%), whereas germacrene D (28.6%), alpha-cadinol (13.0%) and delta-cadinene (9.4%) were the major components in the fruit oil. The oils showed moderate antibacterial activity against the Gram-positive bacteria Staphylococcus aureus and Salmonella typhi.