Lin Shang, Li Hong-Yi, Wang Zi-Ying, Liu Xin, Yang Yang, Cao Zheng-Wen, Du Gang, Zhao Li, Zhang Qing, Wu Ding-Tao, Qin Wen
Institute of Food Processing and Safety, College of Food Science, Sichuan Agricultural University, Ya'an 625014, China.
Sichuan Provincial Institute for Food and Drug Control, Chengdu 611730, China.
Antioxidants (Basel). 2019 Aug 1;8(8):266. doi: 10.3390/antiox8080266.
The root of is used as an important edible and medicinal plant in China. However, its leaves are generally considered byproducts, and therefore do not have a use. Thus, the phenolic compounds in the methanolic extracts (CVLMs) and the chemical characteristics of crude polysaccharides (CVLPs) from the leaves of and their in vitro antioxidant activities were explored. The results showed that chlorogenic acid and rutin were the major individual phenolic compounds in the leaves, which ranged from 1.22 ± 0.03 to 2.87 ± 0.04 mg/g DW, and from 2.25 ± 0.04 to 4.03 ± 0.05 mg/g DW, respectively. Meanwhile, the extraction yields of CVLPs from the leaves ranged from 4.73% to 5.41%. The CVLPs consisted of mannose, rhamnose, galacturonic acid, glucose, galactose, and arabinose, suggesting the existence of pectic polysaccharides. Furthermore, both CVLMs and CVLPs exhibited strong antioxidant activities. Chlorogenic acid and rutin were major contributors to the antioxidant activities of CVLMs, and the antioxidant activities of CVLPs were closely correlated to their α-1,4-D-galactosiduronic linkages. The results are beneficial for understanding the chemical properties and in vitro antioxidant activities of CVLMs and CVLPs. The leaves of have potential to be developed as natural antioxidants.
在中国，[植物名称]的根是一种重要的食用和药用植物。然而，其叶子通常被视为副产品，因此没有用途。因此，对[植物名称]叶子的甲醇提取物（CVLMs）中的酚类化合物、粗多糖（CVLPs）的化学特性及其体外抗氧化活性进行了研究。结果表明，绿原酸和芦丁是叶子中主要的酚类化合物，含量分别为1.22±0.03至2.87±0.04毫克/克干重，以及2.25±0.04至4.03±0.05毫克/克干重。同时，叶子中CVLPs的提取率为4.73%至5.41%。CVLPs由甘露糖、鼠李糖、半乳糖醛酸、葡萄糖、半乳糖和阿拉伯糖组成，表明存在果胶多糖。此外，CVLMs和CVLPs均表现出较强的抗氧化活性。绿原酸和芦丁是CVLMs抗氧化活性的主要贡献者，CVLPs的抗氧化活性与其α-1,4-D-半乳糖苷键密切相关。这些结果有助于了解CVLMs和CVLPs的化学性质和体外抗氧化活性。[植物名称]的叶子有开发成天然抗氧化剂的潜力。
