The use of whole grain rye products, beneficial to one's health, could be substantially extended if their flavour characteristics were better known, and the typical intensively bitter flavour of rye could be modified. The aim of the study was to specify, how the flavour components are distributed in a rye grain, and what could be the contribution of non-volatile, phenolic compounds on the perceived flavour. Rye grains of the cultivar Amilo were milled into five milling fractions. The sensory flavour profiles and amounts of phenolic compounds (phenolic acids, alk(en)ylresorcinols and lignans) of the fractions were determined and related statistically by PLS regression. The flavour components were unevenly distributed in the rye grain, the innermost endosperm being the mildest and the outer bran layers being the most bitter and intense in flavour. The shorts fraction just inside the bran layer proved to be interesting for further applications of new rye products by having a cereal-like flavour without any obvious bitterness. Phenolic compounds, most of which are bioactive and thus health-beneficial, were distributed with a similar pattern in the rye grain as the flavour components: the phenolic compounds were clearly linked to the outer bran fractions, but not to the inner layers of the grain. In conclusion, by milling fractionation of rye uneven distribution of perceived flavour components and non-volatile, flavour-active phenolic compounds in rye grain was shown. This finding might lead to new, rye-based food applications by the use of the middle shorts fraction, which gave cereal-like notes without bitterness and contained more bioactivity than the endosperm of rye grain.
|Publication status||Published - 2004|
|MoE publication type||Not Eligible|
|Event||The First European Conference on Sensory Science of Food and Beverages: A sense of Identity - Florence, Italy|
Duration: 26 Sep 2004 → 29 Sep 2004
|Conference||The First European Conference on Sensory Science of Food and Beverages|
|Period||26/09/04 → 29/09/04|
- milling fractionation
- phenolic compounds
- PLS regression
Heiniö, R-L., Liukkonen, K-H., Myllymäki, O., Pihlava, J. M., Adlercreutz, H., Heinonen, S. M., & Poutanen, K. (2004). Relation between flavour components and bioactive phenolic compounds in rye grain. Abstract from The First European Conference on Sensory Science of Food and Beverages, Florence, Italy.