Amino acid composition, hemicellulose and soluble sugars content in narrow-leaved lupin seeds [Lupinus angustifolius L.] under the effect of Reglone Turbo 200 SL

The aim of the study was to determine the effect of Reglone Turbo 200 SL (diquat) as a desiccant applied to ‘Sonet’ narrow-leaved lupin on protein, amino acid, soluble carbohydrates and hemicellulose content in seeds. Reglone Turbo 200 SL was used at the dose of 2.0 lˇha-1 on day 35 after lupin flowering. The diverse weather conditions significantly influenced the accumulation of some amino acids (threonine, proline, cysteine, glycine, tyrosine, leucine, histidine and lysine), content of soluble sugars and hemicellulose in the seeds tested. The desiccant applied to plants resulted in drought effect and hence an increase in soluble sugars content, particularly cyclitols (D-pinitol, D-chiro-inositol, myo-inositol). A similar effect was observed for hemicellulose. The desiccant applied did not modify the profile, content of amino acids and protein in the seeds tested.