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Contribution to aroma potential of andean blackberry (Rubus glaucus benth.)

Meret M., Brat P., Mertz C., Lebrun M., Günata Z.. 2011. Food Research International, 44 (1) : p. 54-60.

DOI: 10.1016/j.foodres.2010.11.016

Free and glycosidically bound volatiles of purees from Andean blackberry (Rubus Glaucus Benth.) fruit were determined. Free volatile compounds were extracted by two techniques: solvent extraction and Solid-Phase Micro-Extraction (SPME). The glycosidically bound volatiles were isolated using Solid Phase Extraction (SPE) technique. The analysis of free volatiles and enzymatically released aglycons were performed by GC-MS. Fifty five volatile compounds were identified and quantified from solvent extraction. The major class was the carboxylic acids (68.8%), dominated by palmitic acid (16.8%) and benzoic acid (15.0%). Alcohols were highly represented (23.4%), with 2-heptanol (10.6%) and terpinen-4-ol (5.7%) being prevalent compounds of this class. Using HS-SPME, among the seventy-one identified compounds, alcohols (47.3%) including 2-heptanol (17.9%) and terpinen-4-ol (20.0%), and esters (39.8%) with ethyl and methyl benzoate (33.9 and 3.8% respectively) were the two predominant classes. ?-damascenone, a potent flavour compound was detected using SPME method. Fifty-three aglycons were identified, acids (57.4%), norisoprenoids (15.4%), terpenic alcohols (10.3%) and some aliphatic and shikimic alcohols (15.0%) predominated in the glycosidically bound fraction. Acetylenic precursors of ?-damascenone were present at noticeable level in the glycosidic fraction.

Mots-clés : rubus; mûre; composé aromatique; composé volatil; composition chimique; terpénoïde; isoprénoïde; Équateur; france; rubus glaucus

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