天然产物研究与开发 ›› 2021, Vol. 33 ›› Issue (增刊2): 84-91.

• 开发研究 • 上一篇    下一篇

红雪茶总酚酸提取工艺优化及其抗氧化活性研究

周怡伶,罗丰霞,冯士令,丁春邦*   

  1. 四川农业大学生命科学学院,雅安 625000
  • 出版日期:2021-12-28 发布日期:2021-11-23

Optimal extraction and antioxidant activity of total phenolic acids from Lethariella spp.

ZHOU Yi-ling,LUO Feng-xia,FENG Shi-ling,DING Chun-bang*   

  1. College of Life Science,Sichuan Agricultural University,Ya'an 625000,China
  • Online:2021-12-28 Published:2021-11-23

摘要:

以红雪茶为试验材料,利用醇提法并结合Box-Behnken设计,对红雪茶总酚酸提取工艺进行优化。结果显示:当液料比30 mL/g,乙醇浓度为82%,提取时间为1.8 h时,总酚酸得率最高,为13.43±0.56 mg/g(n = 3)。抗氧化试验显示,总酚酸提取物DPPH自由基清除率和总还原能力活性较低,但其体内抗氧化能力较高,0.05 mg/mL总酚酸提取物显著提高热应激损伤组秀丽线虫存活率(15.73%±4.89%,P < 0.01)。研究表明红雪茶提取物具有较好的热应激保护力,可以被开发成具有抗氧化功能食品或饮品。

关键词: 红雪茶, 总酚酸, 优化提取, 秀丽线虫, 抗氧化活性

Abstract:

The extraction process on total phenolic acids from Lethariella spp.was optimized using Box-Behnken design.The result showed that the highest yield of total phenolic acid was 13.43±0.56 mg/g (n = 3) under the optimal extraction condition that the liquid to solid ratio was 30 mL/g,the ethanol concentration was 82%,and the extraction time was 1.8 h.In vivo antioxidant assays demonstrated that total phenolic acids from Lethariella spp.could scavenge DPPH free radical to some degree and also possess a certain total reducing power.Moreover,the total phenolic acids extract could significantly increase the survival rate (15.73%±4.89%,P< 0.01) ofCaenorhabditis elegans under thermal stress at 0.05 mg/mL.The finding suggested that the total phenolic acids extract from Lethariella spp.was a potential natural antioxidant that could be developed into a novel functional product.

Key words: Lethariella spp., total phenolic acid, optimal extraction, Canorhabditis elegans, antioxidant activity

中图分类号:  R284.2