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首页> 外文期刊>Flavour and Fragrance Journal >Use of gas chromatograms of the essential leaf oils of the genus Eucalyptus for taxonomic purposes: E. subser. Euglobulares (Blakely)
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Use of gas chromatograms of the essential leaf oils of the genus Eucalyptus for taxonomic purposes: E. subser. Euglobulares (Blakely)

机译：将桉树属必需叶油的气相色谱法用于分类学目的：E. subser。 Euglobulares（布雷克利）

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摘要

Leaves were harvested from 37 trees of Eucalyptus subser. Euglobulares Blakely, E. globulus Labill., E. bicostata Maiden, Blaekly and Simmonds, E. maidenii F. Muell. and E. pseudoglobulus Naudin ex Maiden, selected from six sites around Australia: both native-growing and cultivated taxa were chosen. Volatile leaf oils were isolated by vacuum distillation and analysed by GC (one tree was previously analysed by GC-MS). The conditions of distillation and analysis were maintained throughout this study. Many of the taxa contianed alpha-pinene (1.5-19.6%), limonene (1.0-5.1%), 1,8-cineole (39.3-71.7%), p-cymene (0.2-2.0%), pinocarvone (0.1-4.2%), beta-carayophyllene (0-5.5%), aromadendrene (0.9-20.3%), allo-aromadendrene (0.1-4.0%), alpha-terpineol (0.1-6.4%), globulol (0.1-5.5%), gamma-eudesmol (0-1.8%), alpha-eudesmol (0.1-5.6%) and beta-eudesmol (0.1-10.8%) as the main leaf oil components. The principal components analysis (PCA) and linear discriminant analysis (LDA) performed on the gas chromatograms of the 37 single trees studied revealed groupings of the taxa in approximate agrreement with the results obtained from comparative morphological studies; LDA yielded four distinct groups, while PCA was not as discriminating. Nevertheless, in both cases the five pseudoglobulus trees formed distinct groups of their own. In addition, the loading factors of the PCA analysis indicated that the pseudoglobulus group was due to the presence in this taxon of large amounts of the three eudesmoil oil components.
机译：从37棵桉木中收获叶子。 Euglobulares Blakely，E。globulus Labill。，E。bicostata Maiden，Blaekly和Simmonds，E。maidenii F. Muell。以及从澳大利亚各地的六个地点选出的假鳞茎瑙丁（E. pseudoglobulus Naudin ex Maiden）：都选择了本地种植和栽培的分类单元。通过真空蒸馏分离出挥发性叶油并通过GC进行分析（一棵树先前通过GC-MS进行了分析）。在整个研究过程中保持蒸馏和分析条件。许多分类单元包含α-pine烯（1.5-19.6％），柠檬烯（1.0-5.1％），1,8-桉树脑（39.3-71.7％），对伞花烯（0.2-2.0％），松香酮（0.1-4.2） ％），β-花椰菜烯（0-5.5％），芳香树烯（0.9-20.3％），别-芳金刚烷（0.1-4.0％），α-松油醇（0.1-6.4％），球蛋白（0.1-5.5％），γ -eudesmol（0-1.8％），α-eudesmol（0.1-5.6％）和β-eudesmol（0.1-10.8％）作为主要的叶油成分。对所研究的37棵单棵树的气相色谱图进行的主成分分析（PCA）和线性判别分析（LDA）显示，与比较形态学研究的结果相近，分类单元的分组大致相同。 LDA分为四个不同的组，而PCA则没有区别。尽管如此，在这两种情况下，五棵伪球树形成了自己的不同组。此外，PCA分析的负载因子表明，假球团是由于该分类单元中存在大量的三种欧德麦油成分。

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