Seagrasses are marine plants that play important ecological functions in coastal ecosystems. The species Zostera noltei is widely distributed along the European coasts thriving in a variety of environmental conditions. In this study, the phenolic natural products of Z. noltei have been analyzed quantitatively by using UPLC-MS. Plants from the Natural Park of the Bay of Cadiz (Spain) were shown to contain rosmarinic acid (1) and the flavonoids apigenin-7-0- glucoside (2), luteolin-7-sulfate (7), apigenin-7-sulfate (8), diosmetin-7-sulfate (9), and acacetin-7-sulfate (10). The analysis by UPLC-MS of extracts allowed the quantification of all the compounds and evidenced the intraspecific variations in the profile of natural products among plants collected at different dates and locations within the Bay. The flavonoids 2, and 7-10 were present in all the analyzed samples with a total flavonoid content in the range 12.8-72.3 mg/g dry wt, while rosmarinic acid (1) was only present in some samples, reaching up to 19.6 mg/g dry wt. A distinctive feature of plants from the Bay of Cadiz is the common presence of apigenin-7-sulfate (8) as major flavonoid, differing from plants from other regions whose major flavonoid is diosmetin-7-sulfate (9).

中文翻译：

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通过UPLC-MS对海藻Zostera noltei中的酚类天然产物进行分析。

海草是在沿海生态系统中起重要生态功能的海洋植物。Zostera noltei物种在各种环境条件下兴旺的欧洲沿海广泛分布。在这项研究中，采用UPLC-MS对No. Z.的酚类天然产物进行了定量分析。来自加的斯湾自然公园（西班牙）的植物显示含有迷迭香酸（1）和类黄酮芹菜素-7-0-葡萄糖苷（2），木犀草素-7-硫酸盐（7），芹菜素-7-硫酸盐（8），7硫酸二乙美汀（9）和7硫酸阿沙西汀（10）。通过UPLC-MS对提取物的分析可以对所有化合物进行定量，并证明了在海湾内不同日期和位置收集的植物之间天然产物的种内差异。黄酮类化合物2 在所有分析样品中，总黄酮含量为12.8-72.3 mg / g，而7-10则存在，而在某些样品中仅存在迷迭香酸（1），最高可达19.6 mg / g。 。加的斯湾植物的一个显着特征是芹菜素-7-硫酸盐（8）作为主要类黄酮的普遍存在，与其他地区的主要黄酮类化合物为薯os皂素-7-硫酸盐（9）不同。