Table 2 Concentrations of tea metabolites in C. sinensis ‘Huangjinju’ under natural sunlight and shade

N

8

8

Amino acid

2.09 ± 0.05

2.13 ± 0.05

Caffeine

3.23 ± 0.07

3.41 ± 0.14

Polyphenol

19.8 ± 1.6^a

24.9 ± 1.3^b

Total Catechin

15.1 ± 1.5^a

18.2 ± 1.1^b

Gallate

0.030 ± 0.007

0.026 ± 0.005

Epigallocatechin

0.22 ± 0.01^a

0.28 ± 0.02^b

Catechin

0.08 ± 0.01^a

0.12 ± 0.01^b

Epicatechin

0.47 ± 0.07

0.53 ± 0.03

Epigallocatechin gallate

12.2 ± 1.7

14.3 ± 1.0

Gallocatechin gallate

0.18 ± 0.05

0.17 ± 0.04

Epicatechin gallate

1.78 ± 0.4^a

2.51 ± 0.4^b

Catechin gallate

0.13 ± 0.01^a

0.20 ± 0.03^b