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Location affects fatty acid composition in Camellia sinensis cv Tieguanyin fresh leaves

  • Li Guo
  • Zheng-hua Du
  • Zan Wang
  • Zhi Lin
  • Ya-ling GuoEmail author
  • Ming-jie ChenEmail author
Original Article
  • 13 Downloads

Abstract

Tieguanyin tea is a typical representative of oolong tea in China, and is famous for its orchid-like aroma. Fatty acids are one of the important precursors for aroma production. However, fatty acid contents and compositions in Tieguanyin largely remain undefined. In this study, we quantified the fatty acid composition in Tieguanyin and its offspring by gas chromatography–flame ionization detector, and compared the effects of growth sites and harvest time on the leaf fatty acid composition. The results showed that total fatty acid contents in Tieguanyin fresh leaves were higher than its offspring. Growth sites had significant impacts on fatty acid contents. Tieguanyin grown in Anxi County showed higher total fatty acid contents, and higher ratio of total unsaturated fatty acids to total saturated fatty acids. The fresh leaves in the morning showed higher total fatty acid contents compared to samples harvested in the afternoon or evening, suggesting a dynamic fatty acid degradation during day period. During tea processing, unsaturated fatty acids including linolenic acid, linoleic acid and oleic acid (18:1Δ9c) decreased 13.1%, 13.2% and 84.2%, respectively. The ratio of unsaturated fatty acids to saturated fatty acids still was above 300%. We found that Tieguanyin was a typical 18:3 plant, and the higher ratio of unsaturated fatty acids to saturated fatty acids of Tieguanyin grown in Anxi County may contribute to its characteristics aroma.

Keywords

Tieguanyin Oolong tea Fatty acid Gas chromatography–flame ionization detector 

Notes

Acknowledgements

This work was financially supported by the Science and Technology Innovation Fund of Fujian Agricultural and Forestry University (CXZX2017350), the Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (CAAS-ASTIP-2014-TRICAAS), and the Earmarked Fund for China Agricultural Research System (CARS-19).

Supplementary material

13197_2019_4034_MOESM1_ESM.docx (25 kb)
Supplementary material 1 (DOCX 24 kb)
13197_2019_4034_MOESM2_ESM.docx (1.3 mb)
Supplementary material 2 (DOCX 1368 kb)

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Copyright information

© Association of Food Scientists & Technologists (India) 2019

Authors and Affiliations

  1. 1.College of Horticulture and Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyFujian Agriculture and Forestry UniversityFuzhouChina
  2. 2.Tea Research InstituteChinese Academy of Agricultural SciencesHangzhouChina
  3. 3.Horticultural Plant Biology and Metabolomics Center/FAFU-UCR Joint Center, Haixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhouChina

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