Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (16): 149-154.doi: 10.11924/j.issn.1000-6850.casb15110061

Special Issue: 园艺

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Analysis and Evaluation of Polyphenols Quality of High Polyphenols Content Tea Varieties in Guizhou

Zhao Huafu, Gao Xiubing, Liu Xiaoxia, Cao Yu, Zhou Shunzheng, Zhou Guolan   

  1. (Tea Research Institute of Guizhou Province, Guiyan 550006)
  • Received:2015-11-10 Revised:2015-12-08 Accepted:2015-12-23 Online:2016-06-17 Published:2016-06-17

Abstract: In order to know the polyphenols quality of high content tea varieties in Guizhou Province, based on available data, high polyphenols content tea varieties were selected to analyze the main ingredients in tea, as well as their polyphenols reversed quality index, catechins quality index, catechins bitter taste index of polyphenol and catechins. The results showed that the annual average content of polyphenol in ‘Qianmei 419’, ‘Qianmei 502’and ‘Qianmei 701’ were 25.4%, 26.5% and 25.8% respectively, which were 6.8%, 8.2%, 7.2% higher than that of ‘Fudingdabaicha’, whose figure was 17.6%,. The polyphenols difference between high polyphenols content varieties and common tea variety ‘Fudingdabaicha’ was significant. Although EGCG and total catechins content were not significantly different between high polyphenols content varieties and ‘Fudingdabaicha’, the EGCG of high polyphenols content varieties was 24.7%, 12.5%, 17.8% higher than that of ‘Fudingdabaicha’, while the total catechins content was 33.7%, 24.3%, 23.1% higher than that of ‘Fudingdabaicha’. It indicated that these three high polyphenols content tea varieties had some advantages in quality. All polyphenols reversed threshold values of these three high polyphenols content varieties were between 40%-60% of water extract, suggesting the green tea production with good quality. Comprehensively considering the catechin quality index and the astringent index, which were 3.98, 4.49 6.06 and 9.41, 9.24, 10.51 of the tree high polyphenols content varieties respectively, the polyphenols quality of ‘Qianmei 502 ’ was better than that of the other two high polyphenols content tea varieties, ‘Qianmei 419’ and ‘Qianmei 701’.