O. TENEVA1, М. ZLATANOV1, G. ANTOVA1 and M. MARCHEVA2
1 University of Plovdiv “P. Hilendarski”, Department of Chemical Technology, BG - 4000 Plovdiv, Bulgaria
2 Agricultural University of Plovdiv, BG – 4000 Plovdiv, Bulgaria
TENEVA, O., М. ZLATANOV, G. ANTOVA and M. MARCHEVA, 2014. Changes of composition in triacylglycerols, sterols and tocopherols of flax during the vegetation. Bulg. J. Agric. Sci., 20: 112-116
The changes of content and composition of flax seed fatty acids, sterols and tocopherols during vegetation in period April - July were investigated. The quantity of glyceride oil increased from 174 - 327g.kg-1 between 21 - 35 day after flowering. In the triacylglycerol fraction the content of oleic acid decreased from 383 g.kg-1 to 322 g.kg-1 at the expense increasing of linolenic acid (from 294 to 342 g.kg-1). In sterol esters higher content of monounsaturated oleic acid was detected – from 392 g.kg-1 at 21 day after flowering to 517 g.kg-1 at 35 day after flowering. The quantity of stearic acid decreased from 167 g.kg-1 to 107 g.kg-1. The content of sterols was 4 g.kg-1 in whole period. β-Sitosterol was the main component in free (454 – 523 g.kg-1) and esterified sterols (553 – 566 g.kg-1) during vegetation, followed by campesterol. The percentage of tocopherols was highest in the first stage of development (975 mg/kg vs 898 mg/kg) in the last period.