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Metabolic dependence of green tea on plucking positions revisited: a metabolomic study.
J Agric Food Chem. 2011 Oct 12; 59(19):10579-85.JA

Abstract

The dependence of global green tea metabolome on plucking positions was investigated through (1)H nuclear magnetic resonance (NMR) analysis coupled with multivariate statistical data set. Pattern recognition methods, such as principal component analysis (PCA) and orthogonal projection on latent structure-discriminant analysis (OPLS-DA), were employed for a finding metabolic discrimination among fresh green tea leaves plucked at different positions from young to old leaves. In addition to clear metabolic discrimination among green tea leaves, elevations in theanine, caffeine, and gallic acid levels but reductions in catechins, such as epicatechin (EC), epigallocatechin (EGC), epicatechin-3-gallate (ECG), and epigallocatechin-3-gallate (EGCG), glucose, and sucrose levels were observed, as the green tea plant grows up. On the other hand, the younger the green tea leaf is, the more theanine, caffeine, and gallic acid but the lesser catechins accumlated in the green tea leaf, revealing a reverse assocation between theanine and catechins levels due to incorporaton of theanine into catechins with growing up green tea plant. Moreover, as compared to the tea leaf, the observation of marked high levels of theanine and low levels of catechins in green tea stems exhibited a distinct tea plant metabolism between the tea leaf and the stem. This metabolomic approach highlights taking insight to global metabolic dependence of green tea leaf on plucking position, thereby providing distinct information on green tea production with specific tea quality.

Authors+Show Affiliations

School of Life Science and Biotechnology, Korea University , Seoul 136-701, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21899366

Citation

Lee, Jang-Eun, et al. "Metabolic Dependence of Green Tea On Plucking Positions Revisited: a Metabolomic Study." Journal of Agricultural and Food Chemistry, vol. 59, no. 19, 2011, pp. 10579-85.
Lee JE, Lee BJ, Hwang JA, et al. Metabolic dependence of green tea on plucking positions revisited: a metabolomic study. J Agric Food Chem. 2011;59(19):10579-85.
Lee, J. E., Lee, B. J., Hwang, J. A., Ko, K. S., Chung, J. O., Kim, E. H., Lee, S. J., & Hong, Y. S. (2011). Metabolic dependence of green tea on plucking positions revisited: a metabolomic study. Journal of Agricultural and Food Chemistry, 59(19), 10579-85. https://doi.org/10.1021/jf202304z
Lee JE, et al. Metabolic Dependence of Green Tea On Plucking Positions Revisited: a Metabolomic Study. J Agric Food Chem. 2011 Oct 12;59(19):10579-85. PubMed PMID: 21899366.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Metabolic dependence of green tea on plucking positions revisited: a metabolomic study. AU - Lee,Jang-Eun, AU - Lee,Bum-Jin, AU - Hwang,Jeong-Ah, AU - Ko,Kwang-Sup, AU - Chung,Jin-Oh, AU - Kim,Eun-Hee, AU - Lee,Sang-Jun, AU - Hong,Young-Shick, Y1 - 2011/09/16/ PY - 2011/9/9/entrez PY - 2011/9/9/pubmed PY - 2012/2/1/medline SP - 10579 EP - 85 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 59 IS - 19 N2 - The dependence of global green tea metabolome on plucking positions was investigated through (1)H nuclear magnetic resonance (NMR) analysis coupled with multivariate statistical data set. Pattern recognition methods, such as principal component analysis (PCA) and orthogonal projection on latent structure-discriminant analysis (OPLS-DA), were employed for a finding metabolic discrimination among fresh green tea leaves plucked at different positions from young to old leaves. In addition to clear metabolic discrimination among green tea leaves, elevations in theanine, caffeine, and gallic acid levels but reductions in catechins, such as epicatechin (EC), epigallocatechin (EGC), epicatechin-3-gallate (ECG), and epigallocatechin-3-gallate (EGCG), glucose, and sucrose levels were observed, as the green tea plant grows up. On the other hand, the younger the green tea leaf is, the more theanine, caffeine, and gallic acid but the lesser catechins accumlated in the green tea leaf, revealing a reverse assocation between theanine and catechins levels due to incorporaton of theanine into catechins with growing up green tea plant. Moreover, as compared to the tea leaf, the observation of marked high levels of theanine and low levels of catechins in green tea stems exhibited a distinct tea plant metabolism between the tea leaf and the stem. This metabolomic approach highlights taking insight to global metabolic dependence of green tea leaf on plucking position, thereby providing distinct information on green tea production with specific tea quality. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/21899366/Metabolic_dependence_of_green_tea_on_plucking_positions_revisited:_a_metabolomic_study_ L2 - https://doi.org/10.1021/jf202304z DB - PRIME DP - Unbound Medicine ER -