Characterization and comparison of antioxidant properties and bioactive components of virginia soybeans.
Nine Virginia soybeans grown in a single location were evaluated and compared for their antioxidant properties and isoflavone profiles. The total phenolic content (TPC) in the soybean extracts was significantly different among different genotypes. The V01-4937, V03-1144, and MFS-511 soybeans had the highest TPC values of 3.89, 3.63, and 3.53 mg of gallic acid equiv/g of seeds, respectively. The isoflavone composition was also different among the different soybean varieties. Malonylgenistin was the major isoflavone in all soybean seeds, accounting for 75-83% of the total measured isoflavones. The V01-4937 variety had the highest total isoflavones and malonylgenistin content followed by the V03-5794. The antioxidant activities of the soybean extracts were also significantly different. V01-4937 and Teejay showed the strongest ORAC values, which were 70% higher than that of the V00-3493 soybean, which had the lowest ORAC value (115.7 micromol of Trolox equiv/g of seeds). However, their ORAC values were correlated with neither TPC nor total isoflavone content. The MFS-511, V01-4937, and Teejay soybeans had the highest DPPH radical scavenging activities of 4.94, 4.78, and 4.64 micromol of Trolox equiv/g of seeds. Overall, the V01-4937 soybean stood out among the tested Virginia soybeans with regard to having the highest TPC, ORAC value, and isoflavone content as well as the second highest DPPH scavenging activity.
Chung
Hyun
H
Department of Food Science, Technology, Crop and Soil Environmental Science, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
Hogan
Shelly
S
Zhang
Lei
L
Rainey
Katy
K
Zhou
Kequan
K
D000975:Antioxidants / Q000737:chemistry*; D005838:Genotype; D007529:Isoflavones / Q000737:chemistry; D010636:Phenols / Q000032:analysis*; D013025:Glycine max / Q000737:chemistry* / Q000235:genetics; D014768:Virginia
D000975:Antioxidants; D007529:Isoflavones; D010636:Phenols