Abstract
Article history: The aim of this work was to determine the volatile constituents of fresh and dried (shade dried) fruits of Magnolia kobus DC. using gas chromatography-mass spectrometry (GC-MS). Essential oils from fresh and dried fruits of M. kobus were obtained by steam distillation and the yields were 0.81 and 1.73% (v/w), respectively. GC-MS analysis revealed the identification of seventeen components from both the fresh and dried fruits of M. kobus, which were mostly monoterpene hydrocarbons (62.8-71.8%). A comparison of oils from fresh and dried fruits exhibited the changes in the amounts of several constituents. Major components of the essential oil were α- pinene (26.7-31.6%), β-pinene (20.2-27.9%) and limonene (8.6-10.0%). In the dried sample, concentration of α- pinene, β-pinene, caryophyllene, camphene, and α-humulene contents were decreased. On the other hand, limonene, α-terpineol, bornyl acetate and terpinen-4-ol contents were increased in the dried sample. The present investigation clearly suggested that the drying treatment decreased the concentration of major components in the essential oil of M. kobus fruit.
Highlights
Magnoliaceae is one of the families of flowering plants and the genus Magnolia contains more than 128 species, with about two-thirds of species are distributed in East and Southeast Asia (Azuma et al, 1999; Gottsberger et al, 2012)
Essential oil obtained from dry fruits of M. kobus revealed the detection of 16 different components
A comparison of oils from fresh and dried fruits revealed the changes in the amounts of several constituents, especially in mono- and sesquiterpene hydrocarbons. α-Pinene (26.7–31.6%) was the most abundant component followed by β-pinene (20.2–27.9%) and limonene (8.6–10.0%) in both the fresh and dried fruits of M. kobus
Summary
Magnoliaceae is one of the families of flowering plants and the genus Magnolia contains more than 128 species, with about two-thirds of species are distributed in East and Southeast Asia (Azuma et al, 1999; Gottsberger et al, 2012). Flower buds of different Magnolia species have been used for the treatments of nasal congestion with headache, sinusitis and allergic rhinitis (Jung et al, 1998; Kim et al, 2003). Kobayashi et al (1998) studied the antirheumatic and antiangiogenic activities of Magnolia flower. Previous studies have reported that the essential oil from different parts of Magnolia taxa have a very wide distribution of monoterpenoid and sesquiterpenoid components (Barros et al, 2012; Guerra-Boone et al, 2013). Flower buds of M. kobus are essential ingredients in the Chinese traditional medicine ‘Shin-I’, which is used for the treatments of headaches, and colds (Matsutani and Shiba, 1975). Previous chemical studies on M. kobus showed that it to be a source of bioactive terpenes and Sowndhararajan et al / Journal of Applied Pharmaceutical Science 6 (04); 2016: 146-149
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