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. 2019 Nov 27;10:1543. doi: 10.3389/fpls.2019.01543

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Copyright © 2019 Li, Lu, Li, Zheng, Wang, Wang, Wang, Ding, Liang and Yang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Caffeine, theanine and catechin biosynthetic pathways in plants, and expression patterns of genes related to quality metabolites in ‘Xiaoxueya’ leaves. (A) Genes involved in the caffeine metabolic pathway. (B) Genes involved in the theanine biosynthetic pathway. (C) Genes involved in the catechin biosynthetic pathway. Genes used for expression analysis are shown in red. The heat maps were generated using the mean of three replicates and MeV software. The blue-white-red schemes are labelled above the heat map. Red and blue represent relatively high and low expression levels, respectively, compared to those shown in white. Asterisks (*) indicate significant differences (p value ≤ 0.05) and |log2FoldChange| ≥ 1 between the values from the sample and third leaf.