Journal of Tea Science Research, 2024, Vol.14, No.3, 169-181 http://hortherbpublisher.com/index.php/jtsr 176 and technical support for future tea plant improvement. Additionally, the organ-dependent changes in metabolite profiles indicate that the interaction between genetics and environment is crucial for understanding tea quality. The study demonstrated that the metabolite profiles related to tea quality in young leaves could distinguish genetic populations of tea, while the profiles in stems could not, indicating a complex network of genetic and environmental interactions (Yamashita et al., 2021). The interaction between the age of tea plants and environmental factors affects metabolite production, with older tea plants exhibiting specific genotype responses under different environmental conditions (Yue et al., 2022). These findings underscore the need for integrated approaches that consider both genetic and environmental factors to optimize tea quality and metabolite production. Table 1 Variations in tea flavor-related metabolite levels in Population (Adopted from Fang et al., 2021) Metabolite Season Range (%) Mean (%) aSD bCV CH' Heritability Theanine Spring 0–4.03 1.56 0.84 0.54 2.03 0.6 (TN) Summer 0–2.58 0.94 0.51 0.54 2.06 Autumn 0–6.01 1.92 1.03 0.54 2.01 Mean – 1.47 0.79 0.54 2.03 Caffeine Spring 0.09–5.36 2.72 0.81 0.3 1.9 0.7 (CAF) Summer 0–3.48 2.29 0.64 0.28 1.85 Autumn 0.03–5.0 2.84 0.81 0.29 1.83 Mean – 2.62 0.75 0.29 1.86 (+)-Gallocatechin Spring 1.08–3.50 2.19 0.47 0.21 2.04 0.55 (GC) Summer 1.38–4.21 2.63 0.6 0.23 2.05 Autumn 1.40–5.31 2.84 0.81 0.29 1.79 Mean – 2.55 0.63 0.24 1.96 (−)-Epigallocatechin Spring 0.40–5.11 2.11 0.81 0.39 2.02 0.59 (EGC) Summer 0.40–9.93 2.37 1.14 0.48 1.96 Autumn 0.40–5.18 2.48 0.93 0.38 2.07 Mean – 2.32 0.96 0.42 2.02 (+)-Catechin Spring 0.83–4.01 1.22 0.45 0.37 1.49 0.9 (C) Summer 0.87–3.14 1.3 0.44 0.34 1.51 Autumn 0.88–3.95 1.36 0.44 0.32 1.58 Mean – 1.29 0.44 0.34 1.53 (−)-Epicatechin Spring 0.08–0.37 0.16 0.05 0.31 1.88 0.7 (EC) Summer 0.08–0.46 0.18 0.06 0.33 1.92 Autumn 0.09–0.34 0.17 0.05 0.29 1.99 Mean – 0.17 0.05 0.31 1.93 (−)-Epigallocatechin3-gallate (EGCG) Spring 3.55–16.24 8.85 2.28 0.26 2.09 0.67 Summer 3.42–12.40 7.47 1.87 0.25 2.08 Autumn 3.68–13.76 8.28 1.96 0.24 2.09 Mean – 8.2 2.04 0.25 2.09 (−)-Gallocatechin gallate Spring 3.10–12.22 5.27 1.16 0.22 1.87 0.75 (GCG) Summer 3.19–7.59 4.93 0.83 0.17 2.03 Autumn 3.05–9.08 5.35 0.83 0.17 2.02 Mean – 5.18 0.94 0.19 1.97 (−)-Epicatechin-3-gal late (ECG) Spring 1.96–8.35 3.7 0.93 0.25 1.92 0.57 Summer 2.02–6.70 3.62 0.73 0.2 2 Autumn 2.06–6.79 3.75 0.86 0.23 1.93 Mean – 3.69 0.84 0.23 1.95 Catechin gallate Spring 3.00–5.74 3.7 0.42 0.11 1.93 0.56 (CG) Summer 3.08–4.94 3.73 0.35 0.09 2.04 Autumn 3.06–6.51 3.82 0.43 0.11 1.89 Mean – 3.75 0.4 0.1 1.95 Note: aSD: standard deviation; bCV: Coefficient of variation; cH’: Shannon-Wiener diversity index
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