Tocopherols in Sunflower Seedlings under Light and Dark Conditions

TheScientificWorldJournal
L Del MoralLeonardo Velasco

Abstract

The objective of this study was to evaluate the dynamics of tocopherols in cotyledons and radicles from sunflower seeds with high and low total tocopherol content, mainly in the α-tocopherol form, and from seeds with increased proportions of β-, γ-, and δ-tocopherol, both under dark and light conditions. Tocopherol content was measured every 24 h from 1 to 12 days after sowing. In all cases, the content of individual tocopherol forms in the cotyledons and radicles was reduced along the sampling period, which was more pronounced under light conditions. The presence of light had a slightly greater effect on α- and γ-tocopherol than on β- and δ-tocopherol. A marked light effect was also observed on total tocopherol content, with light promoting the reduction of tocopherol content in cotyledons and radicles. The study revealed only slight differences in the patterns of tocopherol losses in lines with different tocopherol profiles, both under dark and light conditions, which suggested that the partial replacement of α-tocopherol by other tocopherol forms had no great impact on the protection against oxidative damage in seedlings.

References

Dec 20, 2003·Plant Molecular Biology·Eveline BergmüllerPeter Dörmann
Jul 13, 2005·Journal of Plant Physiology·Sergi Munné-Bosch
Jan 18, 2007·Journal of Agricultural and Food Chemistry·Haiyan ZhangMahinda Wettasinghe
Dec 29, 2009·Plant Physiology and Biochemistry : PPB·Laurent Mène-Saffrané, Dean DellaPenna
Aug 5, 2011·Journal of the Science of Food and Agriculture·Lidia Del MoralLeonardo Velasco

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Methods Mentioned

BETA
light treatment

Software Mentioned

Origin Pro
SPSS Statistics

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