Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: 1/31/2004
Publication Date: 5/5/2004
Citation: Panizzi, M.C., Erhan, S.Z. 2004. Tocopherol composition in brazilian soybean cultivars. Annual Meeting and Expo of the American Oil Chemists' Society. p. 80.
Technical Abstract: Information about chemical composition of soybean cultivars and environmental effects on their composition are important for processors and exporters to attend the demand of niche markets. Tocopherol composition (alpha, beta, gama, delta, and total), was analyzed in 183 Brazilian soybean cultivars grown under fertile soil (pH=5.0, Al=0.0; K=0.43; Ca=2.97; Mg=1.29 and H+Al=10.45 cmolc/dm^3; C=22.75g/dm^3; P=11.96mg/dm^3). A large range of variability was observed among cultivars: 11 to 191ppm for alpha, 6 to 64ppm for beta, 304 to 1333ppm for gama, 174 to 578ppm for delta, and 561 to 1982ppm for total tocopherols. As an antioxidant compound, tocopherol may improve seed quality characteristics, which is highly important for good seed germination in tropical regions. Soybean cultivar Davis presented low concentration of total tocopherols (706ppm), and has been reported as having low seed quality. Comparing the geographic Brazilian regions (South, Central, and Northeast) where soybean is cultivated, same cultivars sowed in two different locations of each region showed greater variability for alpha and gama and less variability for beta and delta tocopherols. In the Central region, Anápolis was the location that showed higher amounts of alpha and gama tocopherols (cv. BRS Nina). In the South region, Londrina was the location that presented higher content of alpha and gama tocopherols (cv. BRS 134). In the Northeast region, in Sambaíba (cv. BRS Seridó) higher concentration of alpha and gama tocopherols were produced. In the Minas Gerais and Goiás states (16 locations), cv. MG/BR 46 Conquista showed higher content of total tocopherol in Conquista, Uberaba, Sacramento, and Cerrado, and lower contents were observed in Alvorada, Iraí, and Uberlândia. The cultivar IAS 5, sowed in different locations (13) of Paraná and São Paulo States showed high total tocopherol content in Londrina, Pedrinhas, Ponta Grossa, and Nuporanga, and lower amounts in Cascavel, Pirassununga, Luiziânia, and Morro Agudo. These data demonstrate that tocopherol content in soybean seeds of same cultivars are influenced by local factors of different locations.