2021年10月17日 星期日
低温处理对茶树叶片中 γ-氨基丁酸和其他活性成分含量的影响
Effect of low temperature treatment on contents of γ-aminobutyric acid and other active components in leaf of Camellia sinensis
2020年 第29卷 第5期 页码[75-77]    下载全文[0.7MB]  
Abstract

Taking leaf of Camellia sinensis (Linn.) Kuntze 'Longjing 43' as research material, variations of contents of γ-aminobutyric acid (GABA) and other active components in leaf were analyzed after 4 ℃ low temperature treatment for 0 (CK), 3, 6 and 9 h. The results show that after 4 ℃ low temperature treatment for different times, there is a certain degree of change in contents of GABA, water extracts, free amino acids, tea polyphenols and catechins in leaf, while no significant variation in contents of caffeine, gallocatechin, epi-gallocatechin, catechin and epicatechin. In which, GABA content is the highest (0.98 mg·g-1) after treatment for 6 h, and significantly (P<0.05)  higher than that of the control; contents of water extracts and free amino acids after treatment for 3 and 6 h are significantly higher than those of the control, while there are no significant differences in other components; contents of tea polyphenols, catechins and 2 esterified catechins components after treatment for 9 h are all significantly lower than those of the control. The comprehensive analysis result shows that 4 ℃ low temperature treatment for 3-6 h can maintain the tea quality and accumulate GABA.

关键词茶树叶片; 低温处理; γ-氨基丁酸(GABA); 茶多酚; 茶叶品质
Key wordsleaf of Camellia sinensis (Linn.) Kuntze; low temperature treatment; γ-aminobutyric acid (GABA); tea polyphenols; tea quality
作者夏兴莉, 廖界仁, 任太钰,马媛春, 王玉花,房婉萍,朱旭君
所在单位南京农业大学园艺学院, 江苏 南京 210095
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基金项目国家自然科学基金资助项目(31870680);江苏省现代农业(茶叶)产业技术体系项目(JATS[2019]423);国家现代农业产业技术体系项目(CARS-19);贵州省科技支撑计划项目(黔科合支撑[2020]1Y004)