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Table 4 Contents of catechins (mg/g fresh weight) and caffeine in the leaves of tea plant treated with methionine sulfoximine (MSX). The value shown is mean ± standard deviation (SD). CK indicates plants grown without MSX treated, while MSX indicates plants treated with MSX. The asterisk indicates significant difference between MSX and CK group (*P < 0.05, **P < 0.01 in student’s t-test). For each treatment, 3 biological replicates were applied

From: Short-term inhibition of glutamine synthetase leads to reprogramming of amino acid and lipid metabolism in roots and leaves of tea plant (Camellia sinensis L.)

  CK MSX P (t-test)
Caffeine 0.37 ± 0.03 0.19 ± 0.07* 0.02
Gallocatechin 3.50 ± 0.38 1.02 ± 0.34** 0.0011
Epigallocatechin 12.7 ± 0.94 7.26 ± 2.70* 0.03
Catechin 0.34 ± 0.05 0.19 ± 0.03* 0.0143
Epigallocatechin gallate 26.4 ± 1.59 17.8 ± 6.33 0.09
Epicatechin 0.25 ± 0.01 0.27 ± 0.10 0.83
Gallocatechin gallate 0.17 ± 0.02 0.12 ± 0.04 0.16
Epicatechin gallate 1.37 ± 0.08 0.92 ± 0.33 0.08
Catechin gallate 0.26 ± 0.02 0.19 ± 0.07 0.17