PHYTIC ACID AND SELECTED MINERAL-COMPOSITION OF SEED FROM WILD-SPECIES AND CULTIVATED VARIETIES OF LUPIN

Seeds of wild lupin species and several cultivars were analyzed for ph ytate, calcium, zinc, iron, copper and manganese composition. Mineral content showed high variability within varieties, particularly Mn, wit h 61-327 mg/100 g dry matter for L. albus and 1.5-38 mg/100 g dry matt er between other species. The ranges (mg/100 g dry matter) of other mi nerals were: Ca, 134-350; Fe, 2.4-10.8; Zn, 2.9-17.6; Cu, 0.4-1.4. Phy tate varied from 0.4 to 1.2 g/100 g dry matter with cultivars of L. al bus and L. cosentinii presenting the lowest values. Very low phytate:Z n and (phytate X Ca):Zn molar ratios were observed in wild L. digitatu s (4.4 and 0.3) and L. pilosis P23030 (5.3 and 0.3), indicating excell ent Zn bioavailability. Phytate:Ca molar ratios of all samples indicat e similar or better bioavailability of Ca as compared to other legume seeds.