Vitamin E concentration in upland cotton seeds
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Vitamin E, tocopherol, is a naturally occurring antioxidant that has been implicated in human health issues such as decreased risk of cardiovascular disease and some forms of cancer, improved immune functions, and in slowing the progress of degenerative diseases. Tocopherol affects plant health much as it does human health, i.e., by scavenging free radicals, thus protecting plant membrane integrity. Tocopherol is a strong antioxidant and increases oil oxidative stability in cottonseed oil. Little is known about the tocopherol content of cotton (Gossypium hirsutum L.) seed. 'Acala 1517-88' and 'Acala 1517-SR2' are reportedly higher in -tocopherol than 'Deltapine 50' or 'Stoneville 825.' Objectives of this research were to determine the variability in vitamin E content among several current upland cotton genotypes grown during 1997 and 1998 at College Station, TX, and when grown at College Station and Chillicothe, TX, in 1997. Tocopherol was extracted from cotton seeds with hexane and levels were determined by HPLC. Years were significant for - and -tocopherol and location was significant for /-tocopherol. However, no differences were detected among 18 genotypes grown during 1997 and 1998 at College Station nor among 13 genotypes grown at College Station and Chillicothe during 1997.