Assessment of nutritional compounds and antinutritional factors in pea (Pisum sativum) seeds

Abstract

The nutrient and antinutritional factor content of 18 pea lines was studied. The following levels were found: non-protein nitrogen 5.2-10.2 g kg-1 DM, protein nitrogen 35.3-42.4 g kg-1 DM, lysine 50.7-76.3 g kg-1 protein DM, histidine 17.8-24.8 g kg-1 protein DM, tyrosine 22.6-30.0 g kg-1 protein DM, protein 25.9-31.9% DM, in vitro protein digestibility 89.3-95.6%, vitamin B1 5.9-10.3 mg kg-1 DM, vitamin B2 1.1-3.7 mg kg-1 DM, sucrose 11.6-25.4 g kg-1 DM, raffinose 4.1-10.3 g kg-1 DM, stachyose 10.7-26.7 g kg-1 DM, verbascose 0.0-26.7 g kg-1 DM, total α-galactosides 22.6-63.4 g kg-1 DM, trypsin inhibitor activity 0.8-8.4 TIU mg-1 DM, inositol hexaphosphate 2.3-6.5 g kg-1 DM, inositol pentaphosphate 0.1-1.8 g kg-1 DM and total inositol phosphates 2.8-7.1 g kg-1 DM. Peas with yellow cotyledons had the highest trypsin inhibitor activities, those with fight green cotyledons had the highest lysine contents, and those with dark green cotyledons were the richest in vitamins B1 and B2. Peas with brown testae had the lowest verbascose and sucrose contents, while they were the richest in inositol hexaphosphate. Smaller peas were characterised by the highest protein nitrogen contents as well as the highest contents of vitamins B1 and B2, verbascose and inositol pentaphosphate. Peas of medium size showed the lowest verbascose, α-galactoside and vitamin B2 contents. Bigger peas showed the lowest inositol pentaphosphate contents.