Janda Bogdan, Stochmal Anna, Montoro Paula, Piacente Sonia, Oleszek Wieslaw
Biochemistry Department, Institute of Soil Science and Plant Cultivation, State Research Institute, ul. Czartoryskich 8, 24-100 Pulawy, Poland.
Nat Prod Commun. 2009 Dec;4(12):1661-4.
The nutritional quality of Persian clover (Trifolium resupinatum), an important pasture crop, depends not only on a high protein content but also on the occurrence of animal health and welfare promoting phytochemicals. Nine phenolic constituents present in the aerial parts of this species were isolated and their structures confirmed by NMR and ESI-MS analyses. The compounds included two chlorogenic acids, four quercetin and two kaempferol glycosides, as well as the isoflavone formononetin-7-glucoside. The concentration of isoflavone was low, not exceeding 1.2 mg/g of dry matter. The concentration of flavonols ranged between 5.9 and 11.8 mg/g, depending on the sampling dates, with the highest concentration occurring in the first cut. A similar trend in the concentration was found for chlorogenic acids, which ranged from 2 mg/g in summer to 7.3 mg/g in spring.
波斯三叶草（Trifolium resupinatum）是一种重要的牧草作物，其营养品质不仅取决于高蛋白含量，还取决于是否含有促进动物健康和福利的植物化学物质。从该物种地上部分分离出九种酚类成分，并通过核磁共振（NMR）和电喷雾电离质谱（ESI-MS）分析确定了它们的结构。这些化合物包括两种绿原酸、四种槲皮素和两种山奈酚糖苷，以及异黄酮芒柄花素-7-葡萄糖苷。异黄酮的浓度较低，不超过1.2毫克/克干物质。黄酮醇的浓度在5.9至11.8毫克/克之间，具体取决于采样日期，首次刈割时浓度最高。绿原酸的浓度也呈现类似趋势，夏季为2毫克/克，春季为7.3毫克/克。
