期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 159, 期 -, 页码 363-371出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2021.01.003
关键词
Camellia sinensis; Heat stress; GABA; Polyphenols; Antioxidant system; Gene expression
资金
- National Natural Science Foundation of China [31870680]
- Fundamental Research Funds for the Central Universities [KYZ201842]
- earmarked fund for China Agriculture Research System [CARS-19]
- Keypoint Research and Invention Program of Jiangsu Province [BE2019379]
- Jiangsu Agriculture Science and Technology Innovation Fund [CX(20)2004]
- Changzhou Science and Technology Support Program [CE20202003]
- Science and Technology support project of Guizhou Province [[2020]1Y004]
Polyphenols in tea plants play a key role in biological and antioxidant activities. Exogenous GABA was found to increase polyphenol content and enhance antioxidant activity in tea plants under heat-stress conditions. The study also revealed that GABA is crucial for the accumulation of polyphenols and upregulation of the antioxidant system.
Polyphenols are important active components in tea plants, which have strong biological activity and antioxidant activity. A certain degree of stress or exogenous substances can significantly increase the content of polyphenols in plants. gamma-Aminobutyric acid (GABA), a natural functional amino acid, was used to study whether exogenous GABA can increase the content of polyphenols and enhance antioxidant activity in tea plants under heat-stress conditions. The results showed that the content of GABA was positively correlated with the content of polyphenols (r = 0.649), especially with the content of total catechins (r = 0.837). Most of the related genes encoding flavonoid metabolism (PAL, C4H, 4CL, CHS, CHI, F3H, F3'H, F3' H, DFR, LAR, ANS, ANR and FLS) as well as enzyme activities (PAL, C4H and 4CL) were upregulated. In addition, the activities of antioxidant enzymes were induced under heat-stress conditions. However, 3-mercaptopropionic acid (3-MPA), an inhibitor of GABA synthesis, exhibited opposite results under heat-stress conditions compared with GABA treatment. These results indicated that GABA plays a key role in the accumulation of polyphenols and the upregulation of the antioxidant system in tea plants under heat-stress conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据