Seeds and oil polyphenol content of sunflower (Helianthus annuus L.) grown with different agricultural management

Using a long term experiment (20 and 11 years of organic cultivation on the same soil), sunflower was cultivated on these soils under organic management and in a different part of the same farm under conventional management. Kernels, teguments and oils were analyzed for their polyphenols content. Five caffeoylquinic acids were identified. No qualitative differences were found in the three cases, while quantitative differences have been pointed out and discussed.