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Journal of Tea Science ›› 2013, Vol. 33 ›› Issue (6): 491-499.doi: 10.13305/j.cnki.jts.2013.06.008

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Metabonomic Analysis on the Effects of different Nitrogen Application Rates and Light/Dark Change on Metabolism in Tea Leaves

YANG Yi-yang1,2, MA Li-feng2, LI Xing-hui3, R. G. Ratcliffe4, N. J. Kruger4, RUAN Jian-yun2, *   

  1. 1. Institute of Horticulture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
    2. Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;
    3. Tea Research Institute, Nanjing Agricultural University, Nanjing 210095, China;
    4. Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
  • Received:2013-03-21 Revised:2013-10-04 Online:2013-12-30 Published:2019-09-04

Abstract: Amino acids, polyphenols, caffeine and other metabolites such as sugars and aromatic substances are important determinants of tea quality. Different cultivation practices affect tea quality by altering the basic metabolite profiles. In this study, the metabolomic changes through nitrogen and samples collected in day and night were investigated in fresh tea shoots by 1H-NMR for non-targeted analysis coupled with a multivariate data analysis and by HPLC for targeted analysis to reveal the mechanism of formation, transformation and relationship of the major characteristic quality components in fresh tea leaves. Non-targeted analysis with 1H-NMR showed significant effect of samples collected in day and night but no difference among N application rates. However, targeted analysis with HPLC showed both significant variations in amino acids and catechins as affected by N rates and light/dark change. There were higher sensitivity of amino acids and sugars but lower sensitivity of tea polyphenols through the metabolomic analysis using 1H-NMR.

Key words: Camellia sinensis, nitrogen application rate, light/dark, polyphenols, amino acids

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