Crops ›› 2018, Vol. 34 ›› Issue (2): 123-128.doi: 10.16035/j.issn.1001-7283.2018.02.022

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Changes of Functional Component Content and Antioxidant Activity during the Growth of Quinoa Sprouts

Luo Xiuxiu1,Qin Peiyou1,Yang Xiushi1,Mei Li2,Ren Guixing1   

  1. 1 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    2 Beijing Agricultural Technology Extension Station, Beijing 100029, China
  • Received:2018-01-10 Revised:2018-02-08 Online:2018-04-20 Published:2018-08-27

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Abstract:

In order to promote the development of a new functional vegetables from quinoa sprouts, a selected quinoa material YY22 with high content of total flavonoids (0.72mg/g) and total polyphenols (1.97mg/g) was used in this study.The changes of functional components including total flavonoids, total polyphenols, and total saponins of quinoa sprouts during seedling stage (14-48d) as well as the vitro antioxidant activity were determined using DPPH and ABTS methods. The results showed that the sprouts grew slowly in the initial period and faster after about 20d of growth. The plant height was 37.37cm when harvested on the 48th day. The total flavonoids and total polyphenols contents in sprouts decreased during growth time, which were still higher than those in the seeds. The content of total saponin showed a dynamic change,it was lower than that in the seeds during growth time and reached a minimum on the 48th day.The vitro antioxidant activity of quinoa sprouts decreased with the growth. There was a significantly positive correlation between the vitro antioxidant activity and total flavonoids content. A highly significantly positive correlation between the vitro antioxidant activity and total polyphenols content were found.The 48-day sprouts behaved higher biological yield, fresher quality, relatively higher contents of total flavonoids (3.19mg/g) and total polyphenols (4.36mg/g), with lower saponin (2.28mg/g) which was benificial to palatability. In addition, the sprouts showed certain DPPH and ABTS scavenging activities.

Key words: Quinoa sprouts, Total flavonoids, Total polyphenols, Total saponins, Antioxidant activity

Fig.1

Changes of plant height of quinoa sprouts during the growth time"

Fig.2

Changes of content of total flavonoids, total polyphenols and total saponins of quinoa sprouts during the growth time"

Fig.3

Changes of antioxidant activity of quinoa sprouts in vitro during the growth time"

Table 1

Correlation analysis between content of total flavonoids, total polyphenol, total saponins and antioxidant activity in vitro of quinoa sprouts at different growth time"

指标Index 总黄酮
Total flavonoids		 总多酚
Total polyphenols		 总皂苷
Total saponins		 DPPH清除活性
DPPH radical-scavenging activity
总多酚Total polyphenols -0.958**
总皂苷Total saponins -0.193 -0.092
DPPH清除活性DPPH Radical-scavenging activity -0.830* -0.937** 0.085
ABTS清除活性ABTS Radical-scavenging activity -0.816* -0.891** 0.172 0.968**
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