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.2022 Feb 24:9:849615.
doi: 10.3389/fnut.2022.849615. eCollection 2022.

The Effects of Plasma-Activated Water Treatment on the Growth of Tartary Buckwheat Sprouts

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The Effects of Plasma-Activated Water Treatment on the Growth of Tartary Buckwheat Sprouts

Ya Wang et al. Front Nutr..

Abstract

The aim was to investigate the effects of buckwheat sprout treated with plasma-activated water (PAW) and their quality, nutrients (protein, amino acids, fat, and carbohydrates), functional active ingredients (total flavonoids, total phenolic acids, γ-gamma aminobutyric acid (GABA), and polysaccharides), and antioxidant activity during germination. PAW had no negative effects on the germination rate, but promoted the stem growth instead, which indicated 1.12-fold higher germination rate compared with the control group. The results of sensory evaluation demonstrated that the obtained sprouts were bright green, shinning, crisp and smooth, with sufficient moisture, and easy to chew. During germination (1-9 days), the water content, amino acids, and reducing sugars of sprouts showed an increasing trend and were basically higher in the PAW group than in the control group, while protein, carbohydrate, and crude fat presented a decreasing trend. The results were that the flavonoid, phenolic acid, γ-GABA, polysaccharides content, and antioxidant activity during germination showed a gradual upward trend but with slight differences, and the antioxidant properties of buckwheat sprouts might be related to the phenolic acid and polysaccharides content. These data show that the PAW treatment on buckwheat sprout have great potential as a dietary source of antioxidant function with health benefits.

Keywords: antioxidant activity; buckwheat; functional activity; germination; nutrients; plasma-activated water.

Copyright © 2022 Wang, Nie and Ma.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Schematic diagram of experimental set-up for plasma-activated water (PAW) generation. 1. Gas source; 2. Gas flow tester; 3. Reactor; 4. Sliding arc discharge; 5. Sample stage; 6. Power supply.
Figure 2
Figure 2
Effects of PAW on moisture content(A), sensory evaluation scores of sprouts in different periods(B).
Figure 3
Figure 3
Changes of nutrients during the germination of buckwheat: protein and total amino acid content(A), carbohydrate and reducing sugar(B).
Figure 4
Figure 4
Changes of crude fat during the germination of buckwheat.
Figure 5
Figure 5
Changes of active substances during the germination of Tartary buckwheat: total flavonoids(A), total phenolic(B), gamma aminobutyric acid (GABA)(C), polysaccharides(D).
Figure 6
Figure 6
Changes of the antioxidant activity during the germination of Tartary buckwheat.
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References

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