{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T08:59:15Z","timestamp":1785488355905,"version":"3.56.0"},"reference-count":56,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T00:00:00Z","timestamp":1785456000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>In this study, total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity (I) were determined in eight soybean cultivars. Assays were conducted on above-ground parts (AGP) and seeds. Peak areas (STIC+ and STIC\u2212) of major metabolites in the total ion current (TIC) chromatogram, obtained by HPLC\u2013MS\/MS, were also calculated. TPC in AGP and seeds ranged from 5.8% to 10.8% and from 2.2% to 4.4%, respectively. TFC was 0.3\u20131.2% and 0.02\u20130.07% for AGP and seeds, respectively. The coefficient of variation of I was 42% for AGP and 45% for seeds. The highest I in AGP was observed in Khabarovskij yubilyar (56.5%) and Kobra (54.3%), while that of seeds was observed in Kobra (47.5%). A positive correlation was found in AGP between I and TPC (0.75), as well as between I and STIC+ (0.81). Strong significant correlations were found in seeds between I and TPC (0.90), TFC (0.83), STIC+ (0.78), and STIC\u2212 (0.87). Leaf TPC, TFC, and I of the eight cultivars showed no correlation with AGP. These findings indicate that conducting targeted studies on AGP and seeds of food and vegetable varieties can help establish sustainable breeding programs for developing functional food products and animal feed.<\/jats:p>","DOI":"10.3390\/molecules31152671","type":"journal-article","created":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T08:20:18Z","timestamp":1785486018000},"page":"2671","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Determination of Phenolic Content and Antioxidant Activity in Khabarovsk Soybean Cultivars"],"prefix":"10.3390","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-0142-5258","authenticated-orcid":false,"given":"Andrei","family":"Kholodkov","sequence":"first","affiliation":[{"name":"Far-Eastern Agriculture Research Institute, 680521 Vostochnoe, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8395-8350","authenticated-orcid":false,"given":"Alexey","family":"Stepanov","sequence":"additional","affiliation":[{"name":"Far-Eastern Agriculture Research Institute, 680521 Vostochnoe, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0244-9576","authenticated-orcid":false,"given":"Natalja","family":"Tsimbalist","sequence":"additional","affiliation":[{"name":"Central Research Laboratory, Department of Biochemical Research Methods, Far Eastern State Medical University, 680000 Khabarovsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9732-1649","authenticated-orcid":false,"given":"Mayya","family":"Razgonova","sequence":"additional","affiliation":[{"name":"N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190031 Saint Petersburg, Russia"},{"name":"Advanced Engineering School, Institute of Biotechnology, Bioengineering and Food Systems, Far Eastern Federal University, Fr. Russian, Ajax, 10, 690922 Vladivostok, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,31]]},"reference":[{"key":"ref_1","unstructured":"FAO (2025). Agricultural Production Statistics\u20142010\u20132024, Food and Agriculture Organization of the United Nations. FAOSTAT Analytical Briefs, No. 121."},{"key":"ref_2","first-page":"64","article-title":"Analysis of the soybean seed market and regional specifics of the placement of originator organizations of varieties","volume":"5","author":"Degtiareva","year":"2024","journal-title":"Econ. Agric. 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