a Dipartimento di Scienze , Università degli Studi della Basilicata , Viale dell'Ateneo Lucano 10, 85100 Potenza , Italy.
Nat Prod Res. 2015;29(17):1673-7. doi: 10.1080/14786419.2014.990906. Epub 2014 Dec 23.
Five landraces of Smallanthus sonchifolius [(Poepp. and Endl.) H. Robinson], known as yacon, were investigated in total phenolic content, antioxidant activity and chemical composition of ethanol extracts (EEs) and decoction extracts (DEs). The results demonstrated that DEs are rich in phenolic acids as caffeic acid, while the EEs show an higher amount of flavonoids, as luteolin 3',7-O-diglucoside and luteolin 7-O-glucoside. These flavonoid glycosides were identified for the first time in yacon extracts, together with apigenin and luteolin. The phytochemical profile explains the different antioxidant activities shown in our study. The landraces PER6-DE and PER4-DE showed the highest radical-scavenging activity and reducing power related to their polyphenolic contents. Results also show that yacon can be considered an important source of bioactive compounds with significant differences among the analysed landraces.
对 5 种菊薯（Smallanthus sonchifolius [(Poepp. 和 Endl.) H. Robinson]）地方品种（被称为雅甘菊）的总酚含量、抗氧化活性和乙醇提取物（EEs）和煎煮提取物（DEs）的化学成分进行了研究。结果表明，DEs 富含咖啡酸等酚酸，而 EE 则含有更多的类黄酮，如木樨草素 3'，7-O-二糖苷和木樨草素 7-O-葡萄糖苷。这些类黄酮糖苷是首次在雅甘菊提取物中鉴定出来的，同时还鉴定出了芹菜素和木樨草素。植物化学成分解释了我们研究中显示的不同抗氧化活性。PER6-DE 和 PER4-DE 两个品种的 DEs 提取物具有最高的自由基清除活性和还原能力，与其多酚含量有关。结果还表明，雅甘菊可以被认为是生物活性化合物的一个重要来源，不同品种之间存在显著差异。
