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Int J Food Sci Nutr. 2017 Aug;68(5):525-537. doi: 10.1080/09637486.2016.1263834. Epub 2016 Dec 5.

Phytochemical profiles and antioxidant activity of 27 cultivars of tea.

Zeng L1,2, Luo L1,3,2, Li H1, Liu R3.

Author information

1
a College of Food Science, Southwest University , Chongqing , PR China.
2
c Tea Research Institute, Southwest University , Chongqing , PR China.
3
b Department of Food Science , Cornell University , Ithaca , NY , USA.

Abstract

Tea, rich in phytochemicals, has been suggested to have human health benefits. The phenolic profiles, antioxidant and antiproliferative activities of 27 tea cultivars were determined. Wide ranges of variation were found in analyzed cultivars for the contents of water-soluble phenolics (121.6-223.7 mg/g dry weight (DW)), total catechins (TC) (90.5-177.2 mg/g DW), antioxidant activities (PSC values 627.3-2332.3 μmol of vitamin C equiv/g DW, ORAC values (1865.1-3489.3 μmol of vitamin C equiv/g DW), CAA values (37.7-134.3 μmol of QE/g DW without PBS wash and 25.3-75.4 μmol of QE/g DW with PBS wash) and antiproliferative activity (53.0-90.8% at the concentration of 400 μg/mL extracts). The PSC, ORAC and CAA values were significantly correlated with phenolics, epicatechin gallate (ECG), CC and TC. Knowledge of specific differences among tea cultivars is important for breeding tea cultivars and gives sights to its potential application to promote health.

KEYWORDS:

Tea; antiproliferation; catechins; cellular antioxidant activity; phenolics

PMID:
27919166
DOI:
10.1080/09637486.2016.1263834
[Indexed for MEDLINE]

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