Widely targeted metabolomic analysis reveals metabolite changes induced by incorporating black tea fermentation techniques in oolong tea processing for quality improvement
文献类型： 外文期刊
作者： Hao, Mengjiao 1 ; Lai, Xingfei 1 ; Li, Qiuhua 1 ; Cao, Junxi 1 ; Sun, Lingli 1 ; Chen, Ruohong 1 ; Zhang, Zhenbiao 1 ; Li, Qian 2 ; Lai, Zhaoxiang 1 ; Sun, Shili 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Tea Res Inst, Guangdong Prov Key Lab Tea Plant Resources Innovat, Guangzhou 510640, Peoples R China
2.Minist Agr & Rural Affairs, Guangdong Acad Agr Sci Sericultural & Agrifood Res, Key Lab Funct Foods, Guangdong Key Lab Agr Prod Proc, Guangzhou 510610, Peoples R China
关键词： Oolong tea; Short fermentation; Wrap-rolling; Astringency; Widely targeted metabolome
期刊名称：FOOD CHEMISTRY （ 影响因子：8.5； 五年影响因子：8.2 ）
ISSN： 0308-8146
年卷期： 2024 年 459 卷
页码：
收录情况： SCI
摘要： Oolong tea, a semi-fermented tea, has a prominent fruity and floral aroma, resembling green tea's astringency and pungency but lacking black tea's mellowness. Oolong tea incorporating black tea fermentation techniques (OT-IBTFT) not only retained its excellent floral and fruity aroma but also reduced astringency and enriched taste. However, metabolite changes remain unknown. In this study, widely targeted metabolomic analysis showed OT-IBTFT reduced prunin, gallocatechin, methyl gallate, and increased loliolide by changing the flavonoid biosynthesis and biosynthesis of secondary metabolites pathways, thereby reducing the astringency and increasing the mellow taste and richness to improve oolong tea quality. In addition, Wrap-rolling 5 times increased fermentation, improving the color and aroma of oolong tea by increasing theaflavic acid and 2-furoic acid, is more significant than wrap-rolling once. In conclusion, these findings provide a theoretical basis for the improvement of oolong tea processing techniques and flavor and quality control.
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