Talhaoui Nassima, Gómez-Caravaca Ana María, Roldán Cristina, León Lorenzo, De la Rosa Raúl, Fernández-Gutiérrez Alberto, Segura-Carretero Antonio
Department of Analytical Chemistry, University of Granada , Avda. Fuentenueva s/n, 18071 Granada, Spain.
J Agric Food Chem. 2015 Feb 18;63(6):1722-9. doi: 10.1021/jf5058205. Epub 2015 Feb 4.
Leaves from six important olive cultivars grown under the same agronomic conditions were collected at four different times from June to December and analyzed by high performance liquid chromatography-diode array detector-time-of-flight-mass spectrometry (HPLC-DAD-TOF-MS). Twenty-eight phenolic compounds were identified and quantified. No qualitative differences were detected among leaves. However, for all cultivars, total concentrations of phenolic compounds decreased from June to August, then increased from October on, and reached higher levels again in December. Principal component analysis provided a clear separation of the phenolic content in leaves for different sampling times and cultivars. Hence, the availability of phenolic compounds depends on both the season and the cultivar. June and December seem to be good times to collect leaves as a source of phenolic compounds. December coincides with the harvest period of olives in the Andalusian region. Thus, in December olive leaves could be valorized efficiently as olive byproducts.
在相同农艺条件下种植的六个重要橄榄品种的叶子于6月至12月的四个不同时间采集，并通过高效液相色谱-二极管阵列检测器-飞行时间质谱（HPLC-DAD-TOF-MS）进行分析。鉴定并定量了28种酚类化合物。在叶子之间未检测到定性差异。然而，对于所有品种，酚类化合物的总浓度从6月到8月下降，然后从10月开始上升，并在12月再次达到较高水平。主成分分析清楚地分离了不同采样时间和品种的叶子中的酚类含量。因此，酚类化合物的可用性取决于季节和品种。6月和12月似乎是收集叶子作为酚类化合物来源的好时机。12月与安达卢西亚地区的橄榄收获期一致。因此，在12月，橄榄叶可以作为橄榄副产品有效地加以利用。
