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Application of Aspergillus sydowii NRRL250 to Degrade Caffeine in Pu-erh Tea

Received: 30 August 2018    Accepted: 17 September 2018    Published: 15 October 2018
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Abstract

Pu-erh tea is produced by a solid-state fermentation. The natural microbiota presented in pu-erh tea influence caffeine level. In previous study, one effective fungi was selected from pu-erh tea and identified as Aspergillus sydowii NRRL250, which could lead caffeine degradation. In this paper, A. sydowii NRRL250 was inoculated into a liquid medium with different initial caffeine concentrations (600, 1200 and 1800 mg/L of caffeine, respectively) to explore caffeine degradation products. The solid-state fermentation of sun-dried tea leaves and submerged fermentation of tea infusion were carried out to investigate the application of A. sydowii NRRL250 through an inoculation. Samples were collected periodically, and the contents of caffeine, theophylline, 3-methylxanthine and theobromine were determined by HPLC. In the substrate tests, caffeine degraded drastically, theophylline and 3-methylxanthine were detected and increased obviously with the degradation of caffeine, and theobromine was not detected. In the solid-state and submerged fermentation, caffeine decreased radically (p<0.05), only about 4.14±0.771 mg/g and 157.8±10.21 mg/L of caffeine were remained, respectively. And theophylline had a dramatic increase (p<0.05), 28.29±2.463 mg/g and 501.2±13.55 mg/L of theophylline were produced in the end of the fermentation. 3-Methylxanthine also increased significantly (p<0.05) in the fermentation. Theobromine remained stable without significant change (p>0.05). Compared with the submerged fermentation without caffeine addition, the extra addition of caffeine could enhance the productions of theophylline and 3-methylxanthine significantly (p<0.05). Therefore, theophylline and 3-methylxanthine were the main degradation products from caffeine, caffeine concentration had a significant (p<0.05) effect on the productions of theophylline and 3-methylxanthine. And A. sydowii NRRL250 had great application potential to produce decaffeinated and high-theophylline tea through an inoculation.

Published in American Journal of Agriculture and Forestry (Volume 6, Issue 6)
DOI 10.11648/j.ajaf.20180606.11
Page(s) 162-168
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Pu-erh Tea, Fungi, Caffeine, Theophylline, Fermentation

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Cite This Article
  • APA Style

    Binxing Zhou, Cunqiang Ma, Hongzhen Wang, Tao Xia, Xiaohong Li, et al. (2018). Application of Aspergillus sydowii NRRL250 to Degrade Caffeine in Pu-erh Tea. American Journal of Agriculture and Forestry, 6(6), 162-168. https://doi.org/10.11648/j.ajaf.20180606.11

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    ACS Style

    Binxing Zhou; Cunqiang Ma; Hongzhen Wang; Tao Xia; Xiaohong Li, et al. Application of Aspergillus sydowii NRRL250 to Degrade Caffeine in Pu-erh Tea. Am. J. Agric. For. 2018, 6(6), 162-168. doi: 10.11648/j.ajaf.20180606.11

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    AMA Style

    Binxing Zhou, Cunqiang Ma, Hongzhen Wang, Tao Xia, Xiaohong Li, et al. Application of Aspergillus sydowii NRRL250 to Degrade Caffeine in Pu-erh Tea. Am J Agric For. 2018;6(6):162-168. doi: 10.11648/j.ajaf.20180606.11

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  • @article{10.11648/j.ajaf.20180606.11,
      author = {Binxing Zhou and Cunqiang Ma and Hongzhen Wang and Tao Xia and Xiaohong Li and Yang Wu},
      title = {Application of Aspergillus sydowii NRRL250 to Degrade Caffeine in Pu-erh Tea},
      journal = {American Journal of Agriculture and Forestry},
      volume = {6},
      number = {6},
      pages = {162-168},
      doi = {10.11648/j.ajaf.20180606.11},
      url = {https://doi.org/10.11648/j.ajaf.20180606.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaf.20180606.11},
      abstract = {Pu-erh tea is produced by a solid-state fermentation. The natural microbiota presented in pu-erh tea influence caffeine level. In previous study, one effective fungi was selected from pu-erh tea and identified as Aspergillus sydowii NRRL250, which could lead caffeine degradation. In this paper, A. sydowii NRRL250 was inoculated into a liquid medium with different initial caffeine concentrations (600, 1200 and 1800 mg/L of caffeine, respectively) to explore caffeine degradation products. The solid-state fermentation of sun-dried tea leaves and submerged fermentation of tea infusion were carried out to investigate the application of A. sydowii NRRL250 through an inoculation. Samples were collected periodically, and the contents of caffeine, theophylline, 3-methylxanthine and theobromine were determined by HPLC. In the substrate tests, caffeine degraded drastically, theophylline and 3-methylxanthine were detected and increased obviously with the degradation of caffeine, and theobromine was not detected. In the solid-state and submerged fermentation, caffeine decreased radically (p0.05). Compared with the submerged fermentation without caffeine addition, the extra addition of caffeine could enhance the productions of theophylline and 3-methylxanthine significantly (pA. sydowii NRRL250 had great application potential to produce decaffeinated and high-theophylline tea through an inoculation.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Application of Aspergillus sydowii NRRL250 to Degrade Caffeine in Pu-erh Tea
    AU  - Binxing Zhou
    AU  - Cunqiang Ma
    AU  - Hongzhen Wang
    AU  - Tao Xia
    AU  - Xiaohong Li
    AU  - Yang Wu
    Y1  - 2018/10/15
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ajaf.20180606.11
    DO  - 10.11648/j.ajaf.20180606.11
    T2  - American Journal of Agriculture and Forestry
    JF  - American Journal of Agriculture and Forestry
    JO  - American Journal of Agriculture and Forestry
    SP  - 162
    EP  - 168
    PB  - Science Publishing Group
    SN  - 2330-8591
    UR  - https://doi.org/10.11648/j.ajaf.20180606.11
    AB  - Pu-erh tea is produced by a solid-state fermentation. The natural microbiota presented in pu-erh tea influence caffeine level. In previous study, one effective fungi was selected from pu-erh tea and identified as Aspergillus sydowii NRRL250, which could lead caffeine degradation. In this paper, A. sydowii NRRL250 was inoculated into a liquid medium with different initial caffeine concentrations (600, 1200 and 1800 mg/L of caffeine, respectively) to explore caffeine degradation products. The solid-state fermentation of sun-dried tea leaves and submerged fermentation of tea infusion were carried out to investigate the application of A. sydowii NRRL250 through an inoculation. Samples were collected periodically, and the contents of caffeine, theophylline, 3-methylxanthine and theobromine were determined by HPLC. In the substrate tests, caffeine degraded drastically, theophylline and 3-methylxanthine were detected and increased obviously with the degradation of caffeine, and theobromine was not detected. In the solid-state and submerged fermentation, caffeine decreased radically (p0.05). Compared with the submerged fermentation without caffeine addition, the extra addition of caffeine could enhance the productions of theophylline and 3-methylxanthine significantly (pA. sydowii NRRL250 had great application potential to produce decaffeinated and high-theophylline tea through an inoculation.
    VL  - 6
    IS  - 6
    ER  - 

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Author Information
  • State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China; College of Long Run Pu-erh Tea, Yunnan Agricultural University, Kunming, China

  • Kunming Dapu Tea Industry Co., LTD, Kunming, China; College of Long Run Pu-erh Tea, Yunnan Agricultural University, Kunming, China; Henan Key Laboratory of Tea Comprehensive Utilization in South Henan, Xinyang Agriculture and Forestry University, Xinyang, China

  • College of Long Run Pu-erh Tea, Yunnan Agricultural University, Kunming, China

  • State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China

  • College of Long Run Pu-erh Tea, Yunnan Agricultural University, Kunming, China

  • College of Long Run Pu-erh Tea, Yunnan Agricultural University, Kunming, China

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