Department of Agroindustrial Science and Technology, Faculty of Engineering Eliseu Maciel, Federal University of Pelotas (UFPEL), CEP 96010-610 Pelotas, RS, Brazil.
Federal University of Pampa (UNIPAMPA), Campus Bagé, CEP 96413-172 Bagé, Brazil.
Food Chem. 2021 May 30;345:128758. doi: 10.1016/j.foodchem.2020.128758. Epub 2020 Dec 10.
Due to the appreciable amounts of bioactive compounds in olive leaves and the effect of abiotic stresses on their synthesis, this study evaluated the metabolic profile of leaves of olive cultivars (Arbequina, Manzanilla and Picual) collected in four periods of the year (autumn, winter, spring and summer). The determination of the profile of bioactive compounds (phenolic compounds, flavonoids, tannins, carotenoids and chlorophylls) by spectrophotometry and the individual compounds by liquid chromatography coupled to mass spectrum, as well as antioxidant potential tests were performed. As results it was possible to observe that the leaves of the cultivar Manzanilla presented the highest levels of phenolic compounds and that the leaves collected in the summer presented a number of compounds much more relevant than the others. Thus, it was possible to conclude that the cultivar and the collection season significantly affect the bioactive content and the antioxidant potential of olive leaves.
由于橄榄叶中含有相当数量的生物活性化合物，以及非生物胁迫对其合成的影响，本研究评估了在一年中的四个时期（秋季、冬季、春季和夏季）采集的橄榄品种（Arbequina、Manzanilla 和 Picual）的叶片的代谢谱。通过分光光度法测定生物活性化合物（酚类化合物、类黄酮、单宁、类胡萝卜素和叶绿素）的图谱，并通过液相色谱-质谱联用仪测定各个化合物，以及抗氧化潜力测试。结果表明，Manzanilla 品种的叶片表现出最高水平的酚类化合物，而在夏季采集的叶片则表现出比其他季节更多的相关化合物。因此，可以得出结论，品种和采集季节对橄榄叶的生物活性含量和抗氧化潜力有显著影响。
