Givaudan, Kemptpark 50, 8310, Kemptthal, Switzerland.
Chemistry Department, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, USA.
Chem Biodivers. 2022 Mar;19(3):e202100963. doi: 10.1002/cbdv.202100963. Epub 2022 Feb 19.
The essential oils from leaves of 20 commercial citrus accessions maintained by the University of California, Riverside Givaudan Citrus Variety Collection and selected on the basis of their odor profile were analyzed by GCMS/FID. The main components were quantified while the semi-quantitative percentage composition data was compiled with data from other publications for sample visualization, classification and comparison with leaf oils from other citrus accessions. Some compositional clusters aligned closely with the taxonomic clades of sweet orange, bitter orange, and C. hystrix while other clades like the mandarins and lemons showed distinct chemical sub-groups. Characteristic compounds for the clusters included linalyl acetate and linalool (bitter orange leaf), sabinene (sweet orange leaf), methyl N-methyl anthranilate (mandarin leaf), γ-terpinene (yuzu leaf), citronellal (C. hystrix), limonene, citronellal and citral (lemons and citrons). A chemometric approach combined with t-SNE cluster plots can be more informative than taxonomic assignments when considering flavor and fragrance characteristics.
由加利福尼亚大学河滨分校吉凡丹柑橘品种收藏所保存的 20 种商业柑橘品种的叶片精油，根据其气味特征进行了选择，并通过 GCMS/FID 进行了分析。主要成分进行了定量分析，而半定量的百分比组成数据则与其他出版物的数据一起编制，用于样品可视化、分类以及与其他柑橘品种的叶片精油进行比较。一些成分聚类与甜橙、苦橙和 C. hystrix 的分类群密切相关，而其他分类群，如橘柚和柠檬，表现出明显的化学亚群。聚类的特征化合物包括乙酸芳樟酯和芳樟醇（苦橙叶）、柠檬烯（甜橙叶）、N-甲基-甲基邻氨基苯甲酸甲酯（橘柚叶）、γ-萜品烯（柚子叶）、香茅醛（C. hystrix）、柠檬烯、香茅醛和柠檬醛（柠檬和枸橼）。化学计量学方法结合 t-SNE 聚类图在考虑风味和香气特征时比分类学赋值更具信息量。
