Effects of Variety, Season, and Region on Theaflavins Content of Fermented Chinese Congou Black Tea. (25th November 2018)

• Record Type: Journal Article
• Authors: Jiang, Yongwen; Hua, Jinjie; Wang, Bei; Yuan, Haibo; Ma, Haile
• Other Names: Hernández Francisca Academic Editor.
• Is Part Of: Journal of food quality. Volume 2018(2018)
• Publication Date: 2018-11-25
• Subjects: Food industry and trade -- Quality control -- Periodicals; Food industry and trade -- Standards -- Periodicals; Food -- Periodicals; 664.07
• DOI: 10.1155/2018/5427302
• Languages: English
• ISSNs: 0146-9428

Abstract

Abstract : The effects of variety, region, and season on the theaflavins content of fermented Congou black tea were determined. Fresh tea leaves from 5 varieties, 3 tea-growing regions, and 3 harvesting seasons were treated by withering, rolling, fermenting, and drying. Contents of theaflavins, polyphenol oxidase (PPO), peroxidase (POD), and individual catechins in each treatment process were determined. The results showed that the varieties of Yinghong 9 and Hongyan 12 produced high concentrations of theaflavin, as much as 0.5% and 0.6%, respectively. The production capacity of theaflavin in different regions had the trend of Yingde > Changsha > Hangzhou. Fresh leaves plucked in spring season produced the strongest theaflavins. In tea leaves, high ratio of PPO to POD activity and high contents of certain individual catechins lead to high yield of theaflavin production during the whole process.