Abstract

Seeds of wild lupin species and several cultivars were analyzed for phytate, calcium, zinc, iron, copper and manganese composition. Mineral content showed high variability within varieties, particularly Mn, with 61–327 mg/100 g dry matter for L. albus and 1·5–38 mg/100 g dry matter between other species. The ranges (mg/100 g dry matter) of other minerals were: Ca, 134–350; Fe, 2·4–10·8; Zn, 2·9–17·6; Cu, 0·4–1·4. Phytate varied from 0·4 to 1·2 g/100 g dry matter with cultivars of L. albus and L. cosentinii presenting the lowest values. Very low phytate: Zn and (phytate × Ca) : Zn molar ratios were observed in wild L. digitatus (4·4 and 0·3) and L. pilosis P23030 (5·3 and 0·3), indicating excellent Zn bioavailability. Phytate : Ca molar ratios of all samples indicate similar or better bioavailability of Ca as compared to other legume seeds.

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