In Vitro Antioxidant Properties and Total Phenolic Contents of Wetland Medicinal Plants in Taiwan

本文章研究目的是評估台灣濕地藥用植物之甲醇和水萃取物之抗氧化活性。評估的項目，包括ABTS 清除，清除DPPH 自由基，還原力，總多酚含量，總類黃酮類含量、總黃酮醇類含量。結果顯示，31 種濕地藥用植物中以水豬母乳、燈心草、碎米莎草、水柳、泥花草、短葉水蜈蚣和香蒲共七種，其抗氧化物和多酚類均具不錯之效果和含量。且由抗氧化活性和總多酚含量之線性相關係數結果得知，水萃取物相關係數為0.14 和甲醇萃取物相關係數為0.23。結果顯示，植物中化學物質含量可能有助於顯著的抗氧化活性，但這種關係並不一定成正比。濕地藥用植物未來在醫藥和保健食品行業中將可作為一個容易取得的天然抗氧化劑的來源。

關鍵字

濕地藥用植物；抗氧化劑；多酚類；黃酮類；黃酮醇類

並列摘要

The aim of this study was to examine the possible antioxidant activities of the methanol and water extracts of 31 medicinal wetland plants in Taiwan. We assayed for such properties such as: TEAC, DPPH radical scavenging, total polyphenol content, total flavonoid and total flavonol contents using the reducing power method. Our results showed that Rotala rotundifolia, Juncus effusus var. decipiens, Cyperus iria, Salix warburgii, Lindernia antipoda, Kyllinga brevifolia, and Typha orientalis possessed both high antioxidant activities and high total polyphenol contents. There was a low correlation between TEAC and total polyphenol content (water extracts, R(superscript 2)=0.14; methanol extracts, R(superscript 2)=0.23) thus eliminating high phenolic content as an important factor in determining the wetland plants' antioxidant capacities. Our results demonstrated that although phytochemicals in the wetland medicinal plants may contribute significantly to their antioxidant activities, these antioxidant activities were not directly related to the polyphenol quantity. Phytochemicals may play key roles in the potent antioxidant activity of wetland medicinal plants. The potential of these easily accessible sources of natural antioxidants should be explored by the pharmaceutical, medical, and health food industries.

並列關鍵字

Antioxidant ； Flavonoid ； Flavonol ； Polyphenol ； Wetland medicinal plant

國際替代計量

In Vitro Antioxidant Properties and Total Phenolic Contents of Wetland Medicinal Plants in Taiwan

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