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Soybean seeds contain many antioxidants, including flavonoids and other phytochemicals. Isoflavone is a phytoestrogen that mimics estrogenic effects on target tissues and also exerts antioxidant activity by sequestering free radicals. Despite many cultivars developed to date, varietal differences in flavonoid content and antioxidant activity in Japanese soybean accessions remain less well characterized. Here, we evaluated the seed content of isoflavones, total flavonoids, and total phenolics in 26 soybean accessions. Next, the antioxidant activity of each accession was examined using antioxidant responsive element (ARE) linked to a luciferase reporter in human HepG2 stable cells. The relative ARE luciferase activity rate of all soybean accessions varied up to 4-fold which ranged from 1.00 to 4.02; and 22 accessions exhibited significant antioxidant activities. Correlation analysis indicated that the level of total isoflavone moderately correlated with antioxidant activity. © The Author(s) 2020. Published by Oxford University Press on behalf of Japan Society for Bioscience, Biotechnology, and Agrochemistry.


Hana Akari Arifin, Takuyu Hashiguchi, Kiyoko Nagahama, Masatsugu Hashiguchi, Melody Muguerza, Yoichi Sakakibara, Hidenori Tanaka, Ryo Akashi. Varietal differences in flavonoid and antioxidant activity in Japanese soybean accessions. Bioscience, biotechnology, and biochemistry. 2021 Mar 24;85(4):916-922

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PMID: 33590836

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