Investigation of bound aroma constituents of yellow-fleshed nectarines (Prunus persica L. Cv. Springbright). changes in bound aroma profile during maturation.
Glycosidically bound volatile constituents of yellow-fleshed clingstone nectarines (cv. Springbright) were identified and quantified at three stages of maturity. Glycoconjugates were isolated by LC on a C(18) reversed phase column with methanol elution followed by hydrolysis with a commercial pectinase enzyme. Forty-five bound aglycons were identified for the first time in yellow-fleshed nectarine. Thirty were terpene derivatives, and the most abundant ones were (E)- and (Z)-furan linalool oxides, linalool, alpha-terpineol, (E)-pyran linalool oxide, 3,7-dimethylocta-1,5-diene-3,7-diol, linalool hydrate, 8-hydroxy-6,7-dihydrolinalool, (E)- and (Z)-8-hydroxylinalools, and (E)- and (Z)-8-hydroxygeraniols. The group of C(13) norisoprenoids included 3-hydroxy-beta-damascone, 3-hydroxy-7,8-dihydro-beta-ionone, 3-oxo-alpha-ionol, 3-hydroxy-7,8-dihydro-beta-ionol, 3-hydroxy-beta-ionone, 3-oxo-7,8-dihydro-alpha-ionol, 3-hydroxy-5,6-epoxy-beta-ionone, 3-oxo-retro-alpha-ionol (isomers I and II), 3-hydroxy-7,8-dehydro-beta-ionol, 4,5-dihydrovomifoliol, and vomifoliol. Generally, levels of bound compounds, in particular monoterpenols and C(13) norisoprenoids, increased significantly with maturation. delta-Decalactone was the only lactone found in the enzymatic hydrolysate of yellow-fleshed nectarine, but its level was much lower than that of its free form.
D002849:Chromatography, Gas; D002853:Chromatography, Liquid; D005638:Fruit / Q000737:chemistry* / Q000254:growth & development*; D006001:Glycoconjugates / Q000032:analysis; D006868:Hydrolysis; D039821:Monoterpenes / Q000032:analysis / Q000737:chemistry; D009812:Odorants / Q000032:analysis*; D011096:Polygalacturonase / Q000378:metabolism; D027861:Prunus / Q000737:chemistry* / Q000254:growth & development; D013729:Terpenes / Q000032:analysis; D014835:Volatilization
D006001:Glycoconjugates; D039821:Monoterpenes; D013729:Terpenes; D011096:Polygalacturonase