A critical review of key odorants in green tea: Identification and biochemical formation pathway

被引:105
作者
Yin, Peng [1 ,2 ]
Kong, Ya-Shuai [1 ]
Liu, Pan-Pan [2 ,3 ]
Wang, Jing-Jing [1 ]
Zhu, Yao [1 ]
Wang, Guang-Ming [1 ]
Sun, Mu-Fang [1 ]
Chen, Yi [1 ]
Guo, Gui-Yi [1 ]
Liu, Zhong-Hua [2 ]
机构
[1] Xinyang Agr & Forestry Univ, Coll Tea Sci, Henan Key Lab Tea Plant Comprehens Utilizat South, 46400, Xinyang, Henan, Peoples R China
[2] Hunan Agr Univ, Natl Res Ctr Engn & Technol Utilizat Bot Funct Ing, Key Lab Tea Sci, Minist Educ, Changsha 410128, Hunan, Peoples R China
[3] Hubei Acad Agr Sci, Fruit & Tea Res Inst, Wuhan 430064, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Green tea; Odor activity value; Flavor dilution factor; Key odorants; Biochemical pathway; SOLID-PHASE MICROEXTRACTION; GAS CHROMATOGRAPHY-OLFACTOMETRY; SIMULTANEOUS DISTILLATION-EXTRACTION; VOLATILE COMPOUNDS; MASS-SPECTROMETRY; POTENT ODORANTS; AROMA COMPOUNDS; GC-O; ACTIVE COMPOUNDS; AMINO-ACIDS;
D O I
10.1016/j.tifs.2022.09.013
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Background: Green tea, which is non-fermented, has the longest production history in China and the rest of the world. Due to the unique processing techniques, green tea has the lowest concentration of volatile compounds, and the aroma quality of green tea is endowed with pure, pleasant and long-lasting characteristics. Not all of the volatile compounds detected in green tea contribute to the aroma profile, the key odorants that do contribute can be identified by odor activity values (OAVs) and/or flavor dilution (FD) factors.Scope and approach: The aim of this review is to summarize the key odorants that have been identified in green tea and discuss the biochemical pathways involved in their formation.Key findings and conclusions: The extraction and identification methods have great effects on the measured composition and concentration of tea volatile compounds. It is therefore important to develop an appropriate combination of analytical-instrumental method to comprehensively improve our understanding of tea volatile compound profiles. The representative key odorants in green tea that have been identified to date are ketones (beta-ionone, 3-methylnonane-2,4-dione, (Z)-1,5-octadien-3-one, and coumarin), alcohols (linalool and geraniol), aldehydes (hexanal, nonanal, decanal, octanal, phenyl acetaldehyde, (E,E)-2,4-nonadienal, and vanillin), het-erooxygenates (4-hydroxy-2,5-dimethyl-3(2H)-furanone), nitrogenous compounds (indole), sulfide compounds (dimethyl sulfide), and phenols (2-methoxyphenol). Most of the key odorants are formed during green tea processing, but the biochemical pathways involved in their formation still need further study.
引用
收藏
页码:221 / 232
页数:12
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