Study On The Variation And Selection Of Main Component Of Essential Oil From Cinnamomum Camphora

Camphora belonging to Lauraneae, Cinnamomum, Sect is a kind of economic forest woods with an important using value. It is not only one of excellent green and timber tree species, but also one of significant species of fragrant plant. Essential oils are contained in the organs of the plant, such as roots, tree-tranks, leaves, branches and fruits. There are more than 60 chemical components in the essential oils, such as linalool, camphora, safrole, borneol, citral, 1,8-cineole, nerolidol, isonerolidol, farnsol, methy-leugenol, α -terpineol and so on. AH the chemical components are important materials for chemical industry. They have been widely used in light-chemical industry, medicine industry, food industry, fragrant and tobacco industry. In addition, they are important export goods.There is an affluence of the essential oil resources of Cinnamomum Camphora in Fujian, China. The linnalool and camphora of oil from Cinnamomum Camphora leaf have been exploited and used for a long history. Because of unreasoningly deforesting, which include unplanned and unconfined cutting, no planning after cutting and extracting oils using trunks and roots, oil resources of Cinnamomum Camphora have been suffering from damaging and the resource amounts are constantly reducing. Therefore, it is very important to protect and exploit the valuable resources by means of effective identification.There is a remarkable feature for the essential oil resources of Sect. Camphora that, is existence of chemotypes. Because of different genetic characteristic and various environment, a species can have several different types of essential oil, which contain different main components. There are significant difference in oil content and its main components among populations and among individuals with populations. Furthermore, distinct chemotype also exists among the essential oils from different parts of the same tree. This situation brings about some difficulties to the exploitation and utilization of the essential oils. Chinese scientists have carried out many investigations and researches on chemotypes of the essential oil and made a great achievement in analysis of components of the essential oils and identification. Owing to complexity and diversification of the essential oils, the regularity of chemotypes for essential oil of Sect. Camphora has not been made clear. It is necessary to carry out further investigation on Sect. Camphora from the angle of physiology, ecology, biochemistry and molecular biology.Twenty-eight counties in fujian were selected and investigated for the essential oil variation of field investigation and analysis of the natural distribution of Cinnamomum Camphora, and the trials about...