Alteration of tocochromanol pattern in some plant oils soybean soja hispida lupine lupinus mutabilis sunflower helianthus annuus and wheat triticum aestivum during germination and growth

Schulz, H.; Lausch, G.; Feldheim, W.

Zeitschrift fuer Naturforschung Section C Journal of Biosciences 40(11-12): 760-766


Accession: 004702976

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Seed, sprout and plant oils from soybean (Soja hispida), lupine (Lupinus mutabilis), sunflower (Helianthus annuus) and wheat (Triticum aestivum) were assayed for their tocochromanol content and composition. High-performance liquid chromatography (HPLC) with fluorescence detection was used to determine tocopherols and tocotrienols of laboratory-extracted soils. In general, leaves of lupine, soja, and wheat with a high chlorophyll-a-content also were found to be rich of alpha-tocopherol; roots contained very little or no tocopherol. Contents of gamma- and delta-tocopherol in soja and lupine decreased during germination and growth, whereas the alpha-tocopherol concentration increases significantly. This evidence suggests that non-alpha-tocopherols might be methylated enzymatically to alpha-tocopherol. Tocohromanol pattern of wheat also changes characteristically in an analogous manner during plant development. Germination of sunflower seeds also resulted in a conversion of beta- and gamma-tocopherols and in a slight decrease of the predominantly occurring alpha-tocopherol. In relation to the lipid content, the concentration of total tocopherols in oil plants increases significantly during growth. Possible implications for the biosynthesis of tocochromanols are discussed.