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Food Chem

Title:		Widely targeted metabolomic analysis reveals dynamic changes in non-volatile and volatile metabolites during green tea processing
Author(s):		Wang H; Hua J; Yu Q; Li J; Wang J; Deng Y; Yuan H; Jiang Y;
Address:		"Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China. Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China. Electronic address: 192168092@tricaas.com. Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China. Electronic address: jiangyw@tricaas.com"
Journal Title:		Food Chem
Year:		2021
Volume:		20210516
Issue:
Page Number:		130131 -
DOI:		10.1016/j.foodchem.2021.130131
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Non-volatile metabolites significantly influence the color, taste, and aromatic qualities of green tea. However, the evolutionary trajectories of non-volatile metabolites, and their transformational relationship with volatile metabolites during processing, remain unclear. In this study, ultra-performance liquid chromatography-tandem mass spectrometry and gas chromatography-tandem mass spectrometry were used to analyze a widely targeted metabolome during green tea processing. In total, 527 non-volatile metabolites, covering 11 subclasses, were identified, along with 184 volatile metabolites, covering 8 subclasses. Significant variations in metabolites were observed during processing, especially in the fixation stage, and the conversion intensity of non-volatile metabolites was consistent with the law of 'Fixation > Drying > Rolling.' A total of 153 non-volatile metabolites were screened out, and amino acids and esters were found to be closely associated with volatile metabolite formation. The results of the present study provide a theoretical basis that could guide green tea processing based on desired quality and components"
Keywords:		*Camellia sinensis Gas Chromatography-Mass Spectrometry Odorants/analysis Tea *Volatile Organic Compounds/analysis Aldehydes Amino acids Fixation Green tea Lipids Widely targeted metabolome;
Notes:		"MedlineWang, Huajie Hua, Jinjie Yu, Qinyan Li, Jia Wang, Jinjin Deng, Yuliang Yuan, Haibo Jiang, Yongwen eng England 2021/06/14 Food Chem. 2021 Nov 30; 363:130131. doi: 10.1016/j.foodchem.2021.130131. Epub 2021 May 16"