Seasonal variations in antioxidant compounds of Olea europaea leavescollected from different Italian cultivars

Journal of Applied Botany and Food Quality

Maria Stella Simonetti¹  Claudia Chiesi¹  Eleonora Urbani¹  Lina Cossignani² 

[1] ;University of Perugia;

关键词: Olea europaea leaves;    antioxidant activity;    oleuropein;    hydroxytyrosol;    HPLC-DAD;   

DOI  :  10.5073/JABFQ.2016.089.025

来源: DOAJ

【 摘 要 】

The objectives of this research were to study the best conditions for phenol extraction from olive tree leaves and to evaluate the content of phenolics and the antioxidant activity by in vitro assays in olive leaves harvested in different periods from four different Italian cultivars. The results showed that leaves/solvent ratio and temperature showed a significant and positive correlation with phenol extraction yield. In all harvesting periods the phenol content of Dolce Agogia samples was higher (P ≤ 0.05) with respect to Moraiolo, Leccino and Frantoio samples. The results of analysis by high-performance liquid chromatography coupled with diode array detector (HPLC-DAD) showed that Dolce Agogia had the highest concentrations of hydroxytyrosol and oleuropein. Moreover the highest contents of bioactives have been found in olive leaves harvested in December and March. In these months, corresponding to olive harvest and pruning of olive trees, leaves represent a waste product and this interesting result could be useful in the production of nutraceuticals.

【 授权许可】

Unknown