数字农科院2.0

Aroma analysis and biomarker screening of 27 tea cultivars based on four leaf color types

文献类型： 外文期刊

作者： Feiquan Wang;Hua Feng;Yucheng Zheng;Ruihua Liu;Jiahao Dong;Yao Wu;Shuai Chen;Bo Zhang;Pengjie Wang;Jiawei Yan

作者机构：

关键词： Aroma metabolomics;Biomarker;GC–MS;Tea plant

期刊名称： Food Research International

ISSN： 0963-9969

年卷期： 2025 年 201 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Green is no longer the only color used to describe tea leaves. As tea plants with different leaf colors—white, yellow, and purple—yield significant economic benefits, scholars are growing increasingly curious about whether these differently colored leaves possess unique aromatic characteristics. Headspace solid-phase microextraction (HS-SPME) combined with GC–MS was used to analyze the volatile metabolites of buds and leaves from 7 white-leaf tea plants, 9 yellow-leaf tea plants, 4 purple-leaf tea plants, and 7 normal (green) tea plants. A total of 125 aroma metabolites were identified. The aroma compounds of heterochromatic tea leaves and green-leaf tea were compared separately. It was found that white-leaf tea had the most upregulated compounds (63 up), mainly floral and fruity aromas, including nerol, Z-isogeraniol, and E-3-hexen-1-yl acetate. Purple-leaf tea had the most downregulated compounds (31 down), including β-myrcene, benzyl alcohol, and methyl salicylate, which are related to fresh and fruity aromas. According to variable importance in projection (VIP > 1) and a p-value < 0.05, a total of 40 differential compounds were detected, among which Z-3-hexenol, 1-nonanol, 2,4-di-tert-butylphenol, and 2,6,10,15-tetramethyl-heptadecane were common in all heterochromatic tea. The random forest model constructed using differential metabolites screened out five aroma metabolites, including Z-3-hexenyl isobutyrate, E-3-hexen-1-yl acetate, 2,4-di-tert-butylphenol, Z-jasmone, and Z-isogeraniol. These metabolites demonstrated high accuracy in the model (AUC = 1) and have the potential to serve as characteristic aroma compounds for distinguishing tea leaf colors.

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