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UV-B Radiation-Induced Changes in Tea Metabolites and Related Gene Expression

  • Fang-yuan FanEmail author
  • Chun-lin Li
  • Zhou Luo
  • Gui-zhen Tang
Chapter

Abstract

UV-B radiation is an inevitable abiotic stress, which could induce a series of changes in metabolites and related metabolisms in plants. UV-B-induced metabolic changes in leaves of Camellia sinensis affect the tea quality. This review summarizes the recent investigations into UV-B radiation-induced changes in tea metabolites and their related gene expression, involving in flavonoids, amino acids, and volatile compounds. UV-B radiation induces flavonoid accumulation by increasing expression of key genes in general phenylpropanoid pathway and flavonoid pathway. The UV-B radiation-induced gene expressions in flavonoid biosynthesis pathway also are affected by transcription factors and endogenous phytohormones signaling pathway. Changes of individual amino acids under UV-B radiation exhibit significant variation among different plants, and their responses to UV-B radiation dose are different. These regulations involve in modulation of gene expressions related to GABA shunt and tricarboxylic acid cycle (TCA). Volatile compounds in Camellia sinensis under UV-B radiation are regulated by both metabolites biosynthesis and volatile glycosidic-precursors hydrolysis. In a word, UV-B radiation influences metabolisms in tea in a rather complex way. More researches on UV-B-induced transcriptional regulation, endogenous-phytohormone signal regulation, metabolisms diversions regulation, etc. are needed in the future.

Keywords

UV-B radiation Tea polyphenols Amino acids Volatile compounds Signal regulation Gene expression 

Notes

Acknowledgments

We thank Eric Scott (Tufts University, USA) for improvements and corrections on the manuscript.

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© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Fang-yuan Fan
    • 1
    Email author
  • Chun-lin Li
    • 1
  • Zhou Luo
    • 1
  • Gui-zhen Tang
    • 1
  1. 1.Zhejiang University Tea Research InstituteHangzhouChina

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