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Food Res Int

Title:		Understanding of formation and change of chiral aroma compounds from tea leaf to tea cup provides essential information for tea quality improvement
Author(s):		Zhou Y; He Y; Zhu Z;
Address:		"Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China. Electronic address: yzhyzb@zju.edu.cn. Hainan Institute, Zhejiang University, Yazhou District, Sanya 572025, China; College of Agriculture and Biotechnology, Zhejiang University, Xihu District, Hangzhou 310030, China"
Journal Title:		Food Res Int
Year:		2023
Volume:		20230317
Issue:
Page Number:		112703 -
DOI:		10.1016/j.foodres.2023.112703
ISSN/ISBN:		1873-7145 (Electronic) 0963-9969 (Linking)
Abstract:		"Abundant secondary metabolites endow tea with unique quality characteristics, among which aroma is the core component of tea quality. The ratio of chiral isomers of aroma compounds greatly affects the flavor of tea leaves. In this paper, we review the progress of research on chiral aroma compounds in tea. With the well-established GC-MS methods, the formation of, and changes in, the chiral configuration of tea aroma compounds during the whole cycle of tea leaves from the plant to the tea cup has been studied in detail. The ratio of aroma chiral isomers varies among different tea varieties and finished teas. Enzymatic reactions involving tea aroma synthases and glycoside hydrolases participate the formation of aroma compound chiral isomers during tea tree growth and tea processing. Non-enzymatic reactions including environmental factors such as high temperature and microbial fermentation involve in the change of aroma compound chiral isomers during tea processing and storage. In the future, it will be interesting to determine how changes in the proportions of chiral isomers of aroma compounds affect the environmental adaptability of tea trees; and to determine how to improve tea flavor by modifying processing methods or targeting specific genes to alter the ratio of chiral isomers of aroma compounds"
Keywords:		*Camellia sinensis/metabolism Odorants/analysis Quality Improvement *Volatile Organic Compounds/analysis Plant Leaves/chemistry Tea/metabolism Aroma Camellia sinensis Chiral isomers Distribution Tea Variation tendency;
Notes:		"MedlineZhou, Ying He, Yunchuan Zhu, Zengrong eng Research Support, Non-U.S. Gov't Review Canada 2023/04/23 Food Res Int. 2023 May; 167:112703. doi: 10.1016/j.foodres.2023.112703. Epub 2023 Mar 17"