Food Chemistry: X (Dec 2023)

Changes in sensory characteristics, chemical composition and microbial succession during fermentation of ancient plants Pu-erh tea

  • Teng Wang,
  • Ruo-yu Li,
  • Kun-yi Liu,
  • Qiu-yue Chen,
  • Nian-guo Bo,
  • Qi Wang,
  • Yan-qin Xiao,
  • Gen Sha,
  • Si-qin Chen,
  • Xin Lei,
  • Yi Lu,
  • Yan Ma,
  • Ming Zhao

Journal volume & issue
Vol. 20
p. 101003

Abstract

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“Ancient tea plants” are defined as tea trees > 100 years old, or with a trunk diameter > 25 cm; their leaves are manufactured to high - quality, valuable ancient plants pu-erh tea (APPT). In this study, a fermentation of APPT were developed, and outstanding sweetness of APPT infusion was observed. During fermentation, the content of soluble sugars, theabrownins (p 1.0; p 2]; While relative levels of 72 metabolites were decreased (VIP > 1.0, p < 0.05 and FC < 0.5. Staphylococcus, Achromobacter, Sphingomonas, Thermomyces, Rasamsonia, Blastobotrys, Aspergillus and Cladosporium were identified as dominant genera, and their relative levels were correlated with contents of characteristic components (p < 0.05). Together, changes in sensory characteristics, chemical composition and microbial succession during APPT fermentation were investigated, and advanced the formation mechanism of its unique quality.

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