Effect of ultraviolet B irradiation on accumulation of catechins in tea (Camellia sinensis (L) O. Kuntze

  • XQ Zheng
  • J Jin
  • H Chen
  • YY Du
  • JH Ye
  • JL Lu
  • C Lin
  • JJ Dong
  • QL Sun
  • LY Wu
  • YR Liang
Keywords: Camellia sinensis, UV-B, catechins, tea cultivar, influence rate, irradiation time.


Effect of UV-B irradiation time on accumulation of foliar catechins in two tea cultivars was investigated. Low influence rate and short term irradiation of UV-B stimulated accumulation of major tea catechins, resulting in an increase in level of total catechins. Excessive irradiation of UV-B supressed the accumulation of tea catechins. Epigallocatechin gallate (EGCG) increased more quickly than the other catechins under appropriate UV-B irradiation. The difference in response of different tea cultivars to
UV-B is discussed.

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eISSN: 1684-5315