GLYCOSIDICALLY BOUND AROMA COMPOUNDS IN THE FRUITS OF PRUNUS SPECIES - APRICOT (PRUNUS-ARMENIACA L), PEACH (P-PERSICA, L), YELLOW PLUM (P-DOMESTICA, L SSP SYRIACA)

HRGC and HRGC-MS identifications of bound aroma compounds from fruits of Prunus species (apricot, P. armeniaca, L.; peach, P. persica, L.; yellow plum, P. domestica, L. ssp. syriaca) were achieved after isolation of extracts obtained by Amberlite XAD-2 adsorption and methanol elution followed by simultaneous enzyme catalysis extraction (SECE) using beta-glucosidase (emulsin). In total, 47 bound aglycons were identified, from which 21 originated from the terpene metabolism. Among them, the following monoterpene diols were found: 3,7-dimethyloct-1-ene-3,7-diol; (E)-2,6-dimethylocta-2,7-diene-1,6-diol; 2,6-dimethyl-1,8-octanediol; and (2E,6Z)-3,7-dimethyl-2,6-octadiene-1,8-diol. The group of C-13 norisoprenoids comprises 3- and 4-hydroxy-beta-damascones, 3-hydroxy-7,8-dihydro-beta-ionone, 3-oxo-alpha-ionol, 3-hydroxy-beta-ionol, 3-hydroxy-7,8-dihydro-beta-ionol, 3-hydroxy-beta-ionone, 3-hydroxy-5,6-epoxy-beta-ionone, dehydrovomifoliol, and vomifoliol. In addition, in peach the isomeric marmelolactones were detected.