Comprehensive characteristic of lipid fraction as a distinguishing factor of three lupin seed species

Abstract

Lupin seeds are indispensable as valuable sources of proteins that possess good technological properties and show health-beneficial effects. Unfortunately, because of the relatively low content, lupin seed oil has not been studied in such a detailed manner as the proteins. Therefore, this study aimed to provide comprehensive data on the chemical composition and technological parameters of the seed lipid fraction isolated from four cultivars of Lupinus angustifolius as well as two cultivars of L. albus and L. luteus. Among the analyzed seeds, L. albus had the highest fat content (10.52–12.06%) and total tocopherols (125.55–130.22 mg/kg dm), while L. angustifolius were marked with the highest carotenoids content (17.20–62.52 mg/kg oil). The fatty acid profile of the studied seeds was determined to be species-specific. From a technological point of view, L. albus seed oils show the highest oxidative stability. The principal components analysis revealed that the chemical composition and technological parameters were markedly different between the different lupin seeds species. The obtained results expand our knowledge of the chemical composition of lupin seed lipids fraction and will help it better utilization as a valuable food ingredient.