Characterization of monovarietal virgin olive oils from introduced cultivars in eastern Morocco

摘要

The aim of this study was to characterize monovarietal virgin olive oils (VOOs) of newhigh-density planting system of three European cultivars (Arbequina, Arbosana andKoroneiki), recently introduced in eastern Morocco. VOOs’ characterization has beencarried out by analyzing several parameters, such as quality indexes, fatty acid contents,minor components, and olive oils’ oxidative stability index (OSI). In this study, we havealso conducted a comparison between these monovarietal VOOs and olive oils ofautochthones cultivar Picholine marocaine. Significant differences between the analyzedVOOs were highlighted. Koroneiki’s VOO had a high phenols content (493.66 mg/kg) and,consequently, the best oxidative stability (94.83 h); Arbrosana’s VOO was distinguishedby its abundance of α-tocopherol (460.07 mg/kg) and by an intermediate OSI (64.83 h).In addition, results showed, firstly, that in all the analyzed oils decarboxymethyl ligstrosideaglycone and decarboxymethyl oleuropein aglycone were the main phenolic compounds,and, secondly, that VOOs of Koroneiki and Arbosana seem to have similar profiles, with ahigh content of natural antioxidants and a high oleic/linoleic ratio, thus boasting a bettershelf life.