食品科学

• 基础研究 • 上一篇    下一篇

枸杞晒干过程中黄酮类化合物和苯丙氨酸解氨酶活性的变化

李朋亮,廖若宇,王 旭,龚 媛,刘敦华*   

  1. 宁夏大学农学院,宁夏 银川 750021
  • 发布日期:2014-12-15

Variations in Flavonoids and PAL Activity from Lycium barbarum L. during Sun-Drying

LI Peng-liang, LIAO Ruo-yu, WANG Xu, GONG Yuan, LIU Dun-hua*   

  1. School of Agriculture, Ningxia University, Yinchuan 750021, China
  • Published:2014-12-15

摘要:

本实验在枸杞表面涂抹Na2CO3、Na2SO3溶液作为除蜡剂,以不涂抹除蜡剂为空白对照,研究晒干过程中总黄酮和苯丙氨酸解氨酶(phenylalanine ammonialyase,PAL)活性的变化,并利用高效液相色谱(highperformance liquid chromatography,HPLC)法检测枸杞中山奈酚、芦丁和槲皮素含量的变化。对总黄酮含量和PAL活性、3 种不同处理方式条件下3 种黄酮类化合物含量之间进行相关性分析。结果表明:Na2CO3、Na2SO3和空白对照处理下的枸杞在晒干过程中PAL活性、总黄酮含量呈现持续上升的趋势,山奈酚、芦丁和槲皮素含量均呈现先增加后下降趋势;同一处理下的PAL活性和总黄酮含量变化呈显著极强正相关,山奈酚、芦丁和槲皮素含量变化呈正相关;除蜡剂影响同一干燥时间下PAL活性、总黄酮、山奈酚、芦丁和槲皮素含量的大小,并且其达到最高值的时间也受除蜡剂的影响。

关键词: 枸杞, 黄酮类化合物, 苯丙氨酸解氨酶, 晒干, 山奈酚, 芦丁, 槲皮素

Abstract:

In this study, sodium carbonate solution and sodium sulfite solution were used as wax removers to smear the
surface of wolfberry (Lycium barbarum L.) fruits and the fruits without wax removal were used as blank control. The
changes in phenylalanine ammonialyase (PAL) activity and total flavonoid content were determined during sun-drying
of wolfberries. Variations in kaempferol, rutin and quercetin contents were also analyzed by high performance liquid
chromatography (HPLC). Meanwhile, correlation analyses were conducted between the content of total flavonoids and PAL
activity, and among the contents of kaempferol, rutin and quercetin. The results showed that continuous accumulations
of PAL activity and total flavonoids were determined during sun-drying. The contents of kaempferol, rutin and quercetin
increased firstly and then decreased. Using the same wax remover, the content of total flavonoids exhibited a significantly
positive correlation with PAL activity. There were also positive correlations among the variations in the contents of
kaempferol, rutin and quercetin for the same treatment. Wax removers affected PAL activity and the contents of total
flavonoid, kaempferol, rutin and quercetin at the same drying time. The time to reach the highest values of total flavonoids,
kaempferol, rutin and quercetin was also influenced by wax removers.

Key words: Lycium barbarum L., flavonoid, phenylalanine ammonialyase, sun-drying, kaempferol, rutin, quercetin

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