Metabolite profiles of essential oils in citrus peels and their taxonomic implications
文献类型: 外文期刊
第一作者: Jing, Li
作者: Jing, Li;Zhang, Guiwei;Xi, Wanpeng;Zhou, Zhiqin;Jing, Li;Lei, Zhentian;Pilon, Alan Cesar;Huhman, David V.;Sumner, Lloyd W.;Jing, Li;Zhang, Guiwei;Xi, Wanpeng;Zhou, Zhiqin;Pilon, Alan Cesar;Xie, Rangjin
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关键词: Citrus L.;Chinese native species;Essential oils;Metabolite profiling GC-MS;Taxonomy
期刊名称:METABOLOMICS ( 影响因子:4.29; 五年影响因子:4.214 )
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收录情况: SCI
摘要: China is an important center of origin for the genus Citrus L. of the family Rutaceae and is rich in wild Citrus species. The taxonomy of Citrus has been a subject of controversy for more than a half century. We propose that the metabolite profiles of Chinese native Citrus species can be used for classification and understanding of the taxonomic relationships within the Citrus germplasm. In this study, triplicate gas chromatography-mass spectrometry (GC-MS) metabolite profiles of 20 Citrus species/varieties were acquired, including 10 native varieties originating in China. R-(+)-limonene, alpha-pinene, sabinene and alpha-terpinene were found to be major characteristic components of the essential oils analyzed in this study, and these compounds contributed greatly to the metabolic classification. The three basic species of the subgenus Eucitrus (Swingle's system), i.e., C. reticulata Blanco, C. medica L. and C. grandis Osb., were clearly differentiated based upon their metabolite profiles using hierarchical cluster analysis (HCA) and partial least square-discriminant analysis (PLS-DA). All the presumed hybrid genotypes, including sweet orange (C. sinensis Osb.), sour orange (C. aurantium L.), lemon (C. limon Burm.f.), rough lemon (C. jambhiri Lush.), rangpur lime (C. limonia Osb.) and grapefruit (C. paradisi Macf.), were grouped closely together with one of their suggested parent species in the HCA-dendrogram and the PLS-DA score plot. These results clearly demonstrated that the metabolite profiles of Citrus species could be utilized for the taxonomic classification of the genus and are complementary to the existing taxonomic evidence, especially for the identification and differentiation of hybrid species.
分类号: Q4
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