A Study on Chemical Components of Essential Oils from Citrus bergamia and Its Close Relatives and Its Taxonomy

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A Study on Chemical Components of Essential Oils from Citrus bergamia and Its Close Relatives and Its Taxonomy

Huang Yuan-Zheng, Chen Shu-Qun, He Chung-Ying, Chen Quan-You, Wu Yun-Lun

Received:1900-01-01 Revised:1900-01-01 Online:1992-05-18 Published:1992-05-18
Contact: Huang Yuan-Zheng

Abstract

Abstract:

Citrus bergamia Risso. is a rare perfumery plant. Taxonomists have different views

on the taxonomy of C. bergamia. Chemical components of leaf and peel essential oils from C.

bergamia, and its close relatives, C. limon, C. aurantifolia and three varieties of C. aurantium,

were analyzed by GC and GC-MS. The analytical result shows that the chemical composi-

tions of the leaf essential oils from C. bergamia are basically the same as those from three va-

rieties of C. aurantium. Their main components are linalool (29.19-39.75% )and linalyl

acetate (24.73-30.24% )etc., and contents of other components are also similar. But their

peel essential oils are different. The peel essential oils from C. bergamia contain less limonene

(29.94%) than those from C. aurantium (92.55-94.31% ) and less beta-pinene (3.00%) and

y-terpinene(3.48% )than those from C. limon or C. aurantifolia (respectiyely 9.16% and

10.42% ) . The peel essential oils from C. bergamia contain not only as much linalool

(22.20%) and linalyl acetate (32.66%)as those in the leaf essential oils from C. aurantium,

but also as much limonene(29.94% )as that in the peel essential oils from C. limon or C.

aurantifolia . The contents of limonene are close to those of the essential oils from C.

aurantifolia.

This result shows that C. bergamia may be a natural hybrid between C.

aurantium and C. aurantifolia, as proposed by Sinclair W. B.

Key words: Citrus bergamia, Essential oil, Chemotaxonomy

Huang Yuan-Zheng, Chen Shu-Qun, He Chung-Ying, Chen Quan-You, Wu Yun-Lun. A Study on Chemical Components of Essential Oils from Citrus bergamia and Its Close Relatives and Its Taxonomy[J]. .

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A Study on Chemical Components of Essential Oils from Citrus bergamia and Its Close Relatives and Its Taxonomy

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