Dynamic changes in flavonoids content during congou black tea processing

TY - JOUR

T1 - Dynamic changes in flavonoids content during congou black tea processing

AU - Liu, Fei

AU - Wang, Yun

AU - Corke, Harold

AU - Zhu, Hongkai

PY - 2022/12/1

Y1 - 2022/12/1

N2 - Flavonoids play important roles in tea quality and flavour, but there is still limited information on flavonoid changes in tea leaves during black tea processing. We performed a comprehensive characterization of the dynamic changes of flavonoids during black tea processing by using ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). A total of 203 flavonoids were identified during black tea processing. A significant increase was observed for flavones, flavonols and flavonoid polymers (mainly consisting of theaflavins) in the withering stage, while over 80% of flavonoids decreased in the fermenting stage. In addition, the hydrolysis of flavonoid glycosides mainly occurred in the rolling stage, and the variation of flavonoids was determined by their thermal stability in the drying stage. This study can support development of approaches or strategies to regulate and control composition and content of flavonoids in black tea.

AB - Flavonoids play important roles in tea quality and flavour, but there is still limited information on flavonoid changes in tea leaves during black tea processing. We performed a comprehensive characterization of the dynamic changes of flavonoids during black tea processing by using ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). A total of 203 flavonoids were identified during black tea processing. A significant increase was observed for flavones, flavonols and flavonoid polymers (mainly consisting of theaflavins) in the withering stage, while over 80% of flavonoids decreased in the fermenting stage. In addition, the hydrolysis of flavonoid glycosides mainly occurred in the rolling stage, and the variation of flavonoids was determined by their thermal stability in the drying stage. This study can support development of approaches or strategies to regulate and control composition and content of flavonoids in black tea.

KW - Black tea

KW - Flavonoids

KW - Metabonomics

KW - Processing

KW - Thermal degradation

U2 - 10.1016/j.lwt.2022.114073

DO - 10.1016/j.lwt.2022.114073

M3 - 文章

SN - 0023-6438

VL - 170

JO - LWT - Food Science and Technology

JF - LWT - Food Science and Technology

ER -