Comparison of Volatile Compounds with Characteristic Odor in Flowers and Leaves of Nojigiku (Chrysanthemum japonense)

[Abstract]: The aim of the present study was to investigate the essential oils isolated from flower and leaf in order to get insight into similarities and differences as to their aroma-active composition. The essential oil obtained from the two parts were analyzed by gas chromatography-mass spectrometry and gas chromatography olfactometry (GC-O). Flower and leaf oils, 38 and 36 constituents, representing 96.4 and 91.0% of the total oil composition, respectively, were identified. The main compounds in flower oil were camphor (47.64%), bornyl acetate (11.87%), and nojigiku alcohol (6.29%), whereas those in leaf oil were camphor (39.14%), nojigiku alcohol (10.76%) and γ-muurolene (7.02%). 13 Aroma-active compounds were identified by GC-O analysis in flower oil and 12 in leaf oil. The main aroma-active compounds in flower oil were camphor (camphor, FD (flavor dilution)=7, OAV (odor active value)=136913), bornyl acetate (camphor, FD=6, OAV=113711), and β-caryophyllene (spicy, FD=5, OAV=116480). In leaf oil, the main aroma-active compounds were camphor (camphor, FD=7, OAV=106784), nojigiku alcohol (camphor, FD=5, OAV=not determined), and β-caryophyllene (spicy, FD=6, OAV=526267).