Sensomics-Assisted Characterization of Key Flowery Aroma Compounds in Lu?an Guapian Green Tea Infusion (Camellia sinensis)

文献类型： 外文期刊

第一作者： Yu, Jieyao

作者： Yu, Jieyao;Wang, Yijun;Ning, Jingming;Zhang, Liang;Zhai, Xiaoting;Wan, Xiaochun;Yu, Jieyao;Ho, Chi-Tang;Wang, Yijun;Ning, Jingming;Zhang, Liang;Zhai, Xiaoting;Wan, Xiaochun;Ho, Chi-Tang;Lin, Zhi;Zhu, Yin;Feng, Zhihui;Ni, Dejiang;Zeng, Shengchun;Zeng, Xuehong

作者机构：

关键词： Lu?an Guapian; aroma of tea infusion; stable isotope dilution assay; flowery odor note; aroma recombination and omission; tea

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.1； 五年影响因子：6.3 ）

ISSN： 0021-8561

年卷期： 2023 年 71 卷 15 期

页码：

收录情况： SCI

摘要： The volatile fraction was isolated from the premium and common grade of Lu'an Guapian green tea infusion by solvent-assisted flavor evaporation distillation. With the application of aroma extract dilution analysis, a total of 52 aroma-active compounds were revealed in the flavor dilution (FD) factor area of 32-8192. Besides, five additional odorants with higher volatility were identified using solid-phase microextraction. The aroma profiles, FD factors, and quantitative data of premium Guapian (PGP) and common Guapian (CGP) showed apparent differences. The intensity of the flowery attribute was significantly higher in PGP than in CGP, while cooked vegetable-like was the most outstanding odor note in CGP. The recombination experiment and the omission test of PGP clarified that dimethyl sulfide, (E,E)-2,4-heptadienal, (E)-beta-ionone, (E,Z)-2,6-nonadienal, 2-methylbutanal, indole, 6-methyl-5-hepten-2-one, hexanal, 3-methylbutanal, gamma-hexalactone, methyl epijasmonate, linalool, geraniol, and (Z)-3-hexen-1-ol were the key odorants of PGP tea infusion. The omission and addition tests of flowery odorants manifested that (E)-beta-ionone, geraniol, and (E,E)-2,4-heptadienal, with higher odor activity values in PGP than in CGP, contributed to the flowery attribute most. The difference in the concentration of the abovementioned odorants with flowery odor notes could be one of the main factors which led to the difference in aroma quality between the two grades of Lu'an Guapian.

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