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The Changes in GABA, GAD and DAO Activities, and Microbial Safety of Soaking- and High Voltage Electric Field-Treated Adzuki Bean Sprouts

Author

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  • Kai-Ying Chiu

    (Department of Post-Modern Agriculture, MingDao University, Changhua 52345, Taiwan)

Abstract

The level of γ-aminobutyric acid (GABA) in nongerminated adzuki bean seeds is low, but it increases substantially during germination and sprouting. In this study, three seed treatments, including soaking (S), high voltage electric field (HVEF), and soaking plus HVEF (SHVEF), were used to examine their effects on sprout growth, sprout GABA content, sprout glutamate decarboxylase (GAD), and diamine oxidase (DAO) activities and microbial loads on 6-day-old adzuki bean sprouts. All the treatments enhanced sprout growth, increased sprout’s GABA, and increased sprouts’ GAD and DAO activities. The examined seed treatments also significantly reduced the microbial loads of the produced 6-day-old adzuki bean sprouts. The most effective treatment that improved the morphological and biochemical traits and reduced microbial loads on produced sprouts was the SHVEF treatment. SHVEF treatment also achieved a 5-log reduction in the microbial loads of total aerobic bacterial counts, total coliform counts, and total mold counts on the produced adzuki bean sprouts. Therefore, SHVEF is effective for increasing adzuki bean sprout production. It can also be used to improve nutritional quality and provide an intervention technique against microbial contamination on produced sprouts.

Suggested Citation

  • Kai-Ying Chiu, 2022. "The Changes in GABA, GAD and DAO Activities, and Microbial Safety of Soaking- and High Voltage Electric Field-Treated Adzuki Bean Sprouts," Agriculture, MDPI, vol. 12(4), pages 1-11, March.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:4:p:469-:d:780052
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    References listed on IDEAS

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    1. Yusaf, Talal & Al-Juboori, Raed A., 2014. "Alternative methods of microorganism disruption for agricultural applications," Applied Energy, Elsevier, vol. 114(C), pages 909-923.
    2. Matej Holc & Peter Gselman & Gregor Primc & Alenka Vesel & Miran Mozetič & Nina Recek, 2022. "Wettability and Water Uptake Improvement in Plasma-Treated Alfalfa Seeds," Agriculture, MDPI, vol. 12(1), pages 1-13, January.
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