茯砖茶加工过程中主要活性物质的变化及其抗氧化活性研究  

Study on the change of main active substances and antioxidantactivity in the processing of Fuzhuan tea

作　　者：毛文彬 孙玉姣[1] 郭梦园 李宝宝 袁旭霜 郝俊宇 MAO Wen-bin;SUN Yu-jiao;GUO Meng-yuan;LI Bao-bao;YUAN Xu-shuang;Hao Jun-yu(School of Food Science and Engineering,Shaanxi University of Science&Technology,Xi′an 710021,China)

机构地区：[1]陕西科技大学食品科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报》2024年第4期53-62,共10页Journal of Shaanxi University of Science & Technology

基　　金：陕西省西安市未央区科技计划项目(202134);陕西省科协青年人才托举计划项目(20220216);陕西科技大学大学生创新创业训练计划项目(S202210708054);陕西科技大学博士科研启动基金项目(BJ16-17)。

摘　　要：研究了陕西茯砖茶不同发花时期主要活性成分的变化和抗氧化活性.研究发现茯砖茶发花第1天、第5天、第20天三组样品可溶性蛋白、总多酚、游离氨基酸含量总体呈现下降趋势,总黄酮呈现先下降后上升趋势(p<0.05).可溶性糖含量总体呈现先上升后下降的趋势,其中鼠李糖、葡萄糖含量总体呈现下降趋势,阿拉伯糖、半乳糖含量呈现先下降后上升趋势,甘露糖含量呈现上升的趋势,木糖含量保持不变(p<0.05).发花第1天、第5天、第20天三组样品抗氧化活性指标中还原力、亚铁离子螯合能力、ABTS自由基清除能力与样品浓度呈正相关,在样品浓度较高时均表现出了较好的抗氧化活性.在低浓度时(0.01~0.05 mg/mL),发花第5天和发花第20天的还原力相较于第1天的还原力显著增强(p<0.05).研究结果可为茯砖茶的标准化加工和开发利用提供理论依据.This article studied the changes in the main active ingredients and antioxidant activity of Shaanxi Fuzhuan brick tea at different flowering stages.The study found that the soluble protein,total polyphenols,and free amino acid content of the three groups of samples from Fuzhuan brick tea showed an overall downward trend on the 1st,5th,and 20th day of flowering,while the total flavonoids showed a first decreasing and then increasing trend(p<0.05).The overall soluble sugar content showed a trend of first increasing and then decreasing,with the content of rhamnose and glucose showing an overall downward trend,the content of arabinose and galactose showing a trend of first decreasing and then increasing,the content of mannose showing an upward trend,and the content of xylose remaining unchanged(p<0.05).On the 1st,5th,and 20th day of blooming,the antioxidant activity indicators of the three groups of samples showed a positive correlation with sample concentration,including reducing ability,ferrous ion chelating ability,and ABTS free radical scavenging ability.They all exhibited good antioxidant activity at high sample concentrations.At low concentrations(0.01~0.05 mg/mL),the reducing power on the 5th and 20th day of flowering was significantly enhanced compared to the first day(p<0.05).The research results can provide theoretical basis for the standardized processing and development and utilization of Fuzhuan tea.

关 键 词：茯砖茶 发花时间 活性成分 抗氧化活性 

分 类 号：TS272.54[农业科学—茶叶生产加工]