Grain quality, phenolic acid contents and antioxidative capacity of different spelt wheat (Triticum aestivum ssp. spelta) cultivars

摘要

The aim of the current study was to characterize five different spelt wheat cultivars (T. aestivum L ssp. spelta) by their physical grain properties and phenolic compounds. The following parameters were detected: thousand kernel weight (TKW), hectoliter weight (HLW), SDSS (sodium dodecyl sulphate sedimentation) test, falling number (FN), crude protein (CP), gluten and Gluten-Index (Gl) as well as total phenolic acid (TPA) contents in total and in three diffemet extracted fractions. Additionally, the antioxidative capacity was analysed by Folin-Ciocalteu (TPC) and ORAC assay. It was observed that most of the quality parameters of spelt wheat grain were determined by the cultivars. TPA contents ranged from 287.2 to 408.7 μg GAE/g. Ferulic acid (FA) was the abundant phenolic acid in grain of the analyzed spelt wheat samples. FA contributed 74 % in total and 91 %for the cell wall bound fraction. TPC values ranged from 1175.0 μg GAE/g to 1375.0 μg GAE/g in total with no significant differences between cultivars. Cell wall bound phenolic acids contributed the highest antioxidative capacity for the Folin-Ciocalteu assay as well as for the ORAC assay. ORAC values were ranging between 27.5 μmol TE/g and 24.6 μmol TE/g. Especially cell wall bound phenolic acids showed highest values which lead to the suggestion of consuming whole wheat products of spelt in order to benefit of their antioxidative effects.